Best Solar Panel Warranty Guide for Installers for 2026

When you install rooftop solar at your home, you invest a few lakhs with the expectation that the panels will generate electricity from sunlight at no cost for 25 years. A solar panel warranty is the legal protection that ensures this investment remains secure throughout the entire 25-year period.

Simply put, a solar panel warranty is the manufacturer’s written commitment that if the panel underperforms, develops a defect, or fails due to manufacturing issues within the promised period, it will be repaired, replaced, or compensated as per the warranty terms.

Usually, there are two main types of solar panel warranties that manufacturers offer:

• Solar panel product warranty: It covers manufacturing defects in the solar module. If the panel stops working due to internal faults during the warranty period, the manufacturer must replace it at no cost. In India, this usually ranges from 10 to 15 years.
• Solar panel performance warranty: It’s a 25-30 years manufacturer’s warranty that ensures the panel will maintain a specified level of power generation over its lifespan. Most high-efficiency modern solar panels guarantee ~90% output at 10 years and ~80-85% output after 25 years.

DISCLAIMER: Solar panel warranty coverage, duration, claim process, and compensation structure vary by manufacturer, model, and installation standards. Terms may differ based on maintenance compliance and approved installation practices. Always refer to the official warranty document issued by the manufacturer and installer for exact conditions, exclusions, and limitations before relying on any coverage.

You must understand that warranty protection comes with conditions. Skipping regular solar cleaning, using unauthorized technicians for repairs, drilling into module frames, or attempting DIY cleaning and modifications (handling cleaning and maintenance on your own instead of hiring professionals) can void the warranty of solar panels completely.

Solar panel manufacturers clearly define installation and maintenance standards. If those guidelines are ignored, even a genuine defect claim can be rejected. Protecting your warranty requires professional installation, maintenance, and certified handling from day one.

Read on to discover the ins and outs of a solar panel warranty in India, its types, reasons that can make a warranty void, how to ensure that the warranty remains intact, what it covers and what it doesn’t, and how Assure by SolarSquare can help you in maintaining your solar panels and protecting your warranty.

TL;DR Summary Box: How Long is a Solar Panel Warranty in India?

Solar panel performance warranty in India is offered for 25-30 years. It means the manufacturer promises that the panel will continue to produce a certain minimum level of solar electricity for 25-30 years.

All solar panels slowly lose efficiency over time. That’s why most brands guarantee that even after 25 years, the panel will still produce ~80-85% of its original power output. This warranty only protects power generation. Manufacturing defects are covered under product warranty, which is usually offered for 10-15 years, depending on the brand.

Here are the main topics covered in this blog in detail:

DISCLAIMER: Solar panel warranty coverage, duration, claim process, and compensation structure vary by manufacturer, model, and installation standards. Terms may differ based on maintenance compliance and approved installation practices. Always refer to the official warranty document issued by the manufacturer and installer for exact conditions, exclusions, and limitations before relying on any coverage.

What is a Solar Panel Warranty and Why is it Important?

A solar panel warranty is a written assurance from the panel manufacturer that protects you if the module develops defects (covered under the product warranty of 10-15 years) or fails to deliver the promised power (covered under the solar panel performance warranty of 25-30 years).

Since PV panels are expected to last 25 years and are exposed to outdoor conditions every day, panel warranty coverage becomes very important.

Let’s understand why it’s so important to have a solar warranty in India.

• Legal assurance that binds the manufacturer: The warranty of solar panels defines what the manufacturer is responsible for and under what conditions they must repair, replace, or compensate you. Simply put, it’s your legal defence when something goes awry without any fault of yours.
• It covers manufacturing defects that are not your fault: Issues such as cell cracks, delamination, or backsheet problems are covered if they arise during the product warranty period.
• It ensures long-term power output: The solar panel performance warranty guarantees that the panel will continue generating electricity at the committed levels year after year for 25-30 years.

What’s the Difference Between Warranty, Guarantee, and Insurance?

Confusion between warranty, guarantee, and insurance usually starts when customers hear terms like 25-year assurance without understanding who is responsible and under what conditions.

Many assume everything is covered for every type of damage, which is not true. Each term defines a different type of protection, and understanding the differences helps avoid solar panel warranty problems and rejected claims later.

Let’s understand what each term means and covers:

• Warranty: A panel warranty is the manufacturer’s written promise to repair or replace a solar panel if it develops a manufacturing defect within a specified period. For example, if the module stops functioning due to internal faults or defective cells during the warranty period, the manufacturer will replace it at no cost under the terms of the warranty. There are some terms and conditions under which warranties are promised by the manufacturer. Please ask for necessary documentation regarding the same to your vendor.
• Guarantee: A solar panel guarantee refers to the power generation commitment. For instance, if the manufacturer or installer promises that the panel will generate a certain percentage of its original output over time, that is a performance guarantee. There are some terms and conditions under which guarantees are promised by the manufacturer. Please ask for necessary documentation regarding the same to your vendor.
• Insurance: Insurance covers external risks beyond the manufacturer’s control. Damage caused by floods, cyclones, lightning, or other natural disasters falls under insurance coverage. In such cases, the insurance company pays for the damage in accordance with the policy terms.

Why Rs. 2-3 Lakh Solar Investment Needs Legal Warranty Protection?

When you invest a few lakhs in rooftop solar systems, you are planning for 25 years of power generation. And that’s a long time for any electrical equipment to operate outdoors. Over two decades, exposure to heat, humidity, dust, heavy rainfall, and voltage fluctuations can affect performance. Even if panels are designed for durability, unexpected manufacturing defects or early component failures can occur.

A legal solar warranty ensures you are not left bearing the cost if something goes wrong during the covered period.

Not just panels, every major solar component comes with its own warranty timeline.

• Solar panels: They have a performance warranty of 25-30 years and a product warranty of 10-15 years.
• Mounting structures: Product warranty for 10 years and design warranty for 25 years.
• Solar inverters: They come with a solar warranty of 5 to 10 years, depending on the brand.

Since solar warranty terms vary based on manufacturer and component type, reviewing the exact coverage before installation is essential. Clear documentation protects your investment and defines who’s responsible for which failure from day one.

Warranty vs Lifespan: What Most Homeowners Confuse

Many homeowners who install a rooftop solar panel system at home assume that a 25-year solar panel warranty means the panel will function perfectly for 25 years without any issues. This is where confusion begins. Lifespan and warranty are two different concepts.

• Lifespan: It refers to the expected working life of a solar panel under normal conditions. Most types of tier-1 solar panels are designed to last 25 years or more, and many continue generating electricity even beyond that period.
• Warranty: It is the protection offered if the panel fails or underperforms within a defined timeframe. If a panel gets damaged early due to a manufacturing defect or its performance drops below the guaranteed level during the warranty period, the manufacturer is responsible for repair, replacement, or compensation as per the terms.

In simple terms, the lifespan of a panel is how long it is expected to work, while a warranty protects you if the actual panel performance falls short of what the warranty promises.

What are the Different Types of Solar Panel Warranties in India?

Solar panel warranties in India are divided into different types, and each type protects a specific aspect of the panel. Many buyers hear a 25-year warranty and assume everything is covered for 25 years. In reality, one warranty covers manufacturing defects for a shorter period, and another covers the solar panel output for a longer period.

• If the panel hardware fails, you rely on the product warranty.
• If the panel’s power output drops below committed levels, the solar panel performance warranty applies.

Let’s now understand all types of solar warranties in detail.

#1. Solar Panel Performance Warranty

A solar panel performance warranty is valid for 25-30 years. It solely focuses on power generation output. Solar panels produce their maximum rated power in the first year of operation. After that, output declines every year due to natural degradation. The performance warranty guarantees that this reduction will remain within defined limits.

In most cases, manufacturers promise that the solar panel will produce ~90% of its original power after 10 years and ~80-85% output after 25 years.

If the panel’s actual generation falls below the guaranteed levels for no fault of the customer, the manufacturer is obligated by law to address the issue under the warranty terms.

#2. Solar Panel Product Warranty

A panel product warranty lasts 10-15 years, depending on the brand, and covers manufacturing defects in the module’s hardware. It is only applicable when the physical components of the panel fail due to faults during solar panel production.

It can cover the following solar panel issues:

• Defective solar cells
• Delamination or backsheet failure
• Junction box defects
• Soldering defects caused during manufacturing
• Internal electrical faults

Unlike a solar panel performance warranty, which focuses on power output over time, a product warranty addresses the module’s build quality and physical integrity.

Solar System Warranty

When evaluating solar warranty coverage for the entire solar energy system, it is important to separately review the warranties of components such as mounting structures and inverters.

These warranties are issued by the respective OEMs and differ from the warranty on solar panels.

• Inverter warranty duration: 5-10 years (as per OEM)
• Mounting structure warranty duration: Product warrant for 10 years and design warranty for 25 years.
• Monitoring system warranty duration: 5-10 years (as per OEM)

Solar Panel Product Warranty vs Solar Panel Performance Warranty: What’s the Difference?

It’s easy to confuse a solar panel product warranty with a performance guarantee, since both are marketed together under the 25-year promise. In reality, they protect different aspects of your solar panels. One focuses on physical defects, while the other focuses on long-term power output commitment.

Here’s a side-by-side comparison table that explains both:

What Is Covered Under a Solar Panel Warranty?

A solar panel warranty covers technical failures and performance shortfalls that occur during the warranty period. The exact coverage depends on whether you are referring to product warranty, performance warranty, or workmanship warranty, and varies by manufacturer.

• Manufacturing defects: Product warranty covers faults that occur in panels during manufacturing. This can include defective solar cells, backsheet failure, delamination, frame defects, or junction box malfunction. If such issues cause the panel to stop functioning within the warranty period, the manufacturer is responsible for repair or replacement.
• Performance degradation beyond guaranteed levels: Solar panel performance warranty protects against excessive power loss beyond the promised degradation levels. For example, if a manufacturer guarantees 90% output at 10 years, and the panel falls below these thresholds, corrective action is taken.
• Installation errors covered by workmanship warranty: Separate from the manufacturer’s warranty, installers may offer a workmanship warranty of their own. This covers installation-related faults such as improper mounting, loose wiring, or incorrect handling during installation that lead to performance issues.

DISCLAIMER: Solar panel warranty coverage, duration, claim process, and compensation structure vary by manufacturer, model, and installation standards. Terms may differ based on maintenance compliance and approved installation practices. Always refer to the official warranty document issued by the manufacturer and installer for exact conditions, exclusions, and limitations before relying on any coverage.

What Is Not Covered Under a Solar Panel Warranty?

A solar panel warranty can protect you against manufacturing defects and performance shortfalls, but it does not cover every type of damage your panels may endure over their life. Many solar panel warranty problems and claim rejections happen because customers assume all failures are automatically covered.

So, let’s find out what a solar panel warranty does not cover:

• • Damage from natural disasters: Extreme weather events and natural calamities such as lightning, floods, or cyclones are outside the manufacturer’s responsibility. Such damage must be covered under a separate insurance policy, as it does not fall within the scope of the panel warranty.
  • Theft or external physical damage: If your panels are stolen or damaged due to vandalism or external impact during maintenance due to stepping on the panels, panel warranty coverage does not apply.
  • Accidental breakage or mishandling: Damage caused during transport, installation errors, drilling, or improper handling is excluded from manufacturer’s warranty.
  • Cosmetic issues that don’t affect performance: Minor scratches, discoloration, or visual changes that do not reduce power output are not considered valid claims.
  • Damages caused due to non-adherence to prescribed maintenance protocols: Every manufacturer has a set of rules for maintenance and cleaning. If a damage occurs due to non-compliance, the manufacturer is not responsible.

What Can Void Your Solar Panel Warranty?

If you ignore the installation and maintenance terms and conditions set by the panel manufacturer, chances are very high that your warranty claim will get rejected.

Here are the mistakes that many people make, only to realize later that the warranty has become void.

• Improper or irregular maintenance: Solar panels need periodic cleaning and maintenance performed by verified companies such as Assure by SolarSquare. Heavy dirt buildup, corrosion due to neglect, or lack of routine care can lead to claim rejection if poor maintenance contributed to the issue.
• Using unauthorized technicians for repairs: If repairs or inspections are carried out by local electricians who are not qualified to perform repairs and maintenance, warranty protection will most likely become invalid.
• DIY modifications (handling modifications on your own instead of hiring professionals) or structural changes: Drilling into the panel frame, changing the wiring connections, moving the panels without approval, or making physical changes such as cutting the frame, opening the back sheet, or tampering with the junction box can void the warranty immediately.
• Installation by non-certified installers: If panels get damaged during installation being carried out by someone who is not authorized by the DISCOM to install rooftop solar in India, panel warranty claims may not be honored.
• Failure to register warranty or maintain documentation: Many brands require product registration after installation. Missing invoices, serial numbers, maintenance records, or commissioning documents can also delay or invalidate claims.

How Can Improper Maintenance Void Your Solar Warranty?

Improper maintenance is one of the most common reasons solar warranty claims get rejected in India. Most manufacturers clearly state that panels must be maintained by trained professionals only. If a defect is traced back to neglect, corrosion, excessive dirt buildup, or poor maintenance, the manufacturer can legally deny the claim.

• Manufacturer warranty maintenance requirements: Manufacturers have simple conditions for maintaining the warranty, including periodic cleaning, visual inspections, ensuring proper drainage, and preventing prolonged shading. If maintenance guidelines are not followed and damage occurs as a result, the issue may be classified as preventable rather than a manufacturing defect.
• Impact of dirt, bird droppings, and corrosion on warranty claims: Heavy dust accumulation, bird droppings, and standing water can accelerate corrosion or create hot spots on modules. When left unchecked, these conditions reduce solar output and even damage components. If performance loss is linked to these poor maintenance practices rather than internal defects, the claim can be rejected.

What are the Common Solar Panel Warranty Problems that Homeowners Face?

A solar panel warranty is extremely reassuring because 25+ years is a long time for panels to malfunction. However, if you do not follow the proper cleaning, installation, and maintenance practices as listed by the panel manufacturer, you may face multiple issues, including claim rejection due to a fault even during the solar warranty period.

Let’s have a look at the most common solar warranty problems that homeowners can face due to ignorance:

• Claim rejections due to poor documentation: Manufacturers ask for purchase invoices, serial numbers, installation reports, maintenance records, and performance data. If these documents are missing or incomplete, claims can be delayed or rejected.
• Disputes between installer and manufacturer: Sometimes the manufacturer may blame the issue on installation faults, while the installer may claim it is a manufacturing defect. This back-and-forth can delay resolution, leaving you stuck in the middle. That’s why you must pick a credible solar installation company with a track record of solid reviews and happy customers.
• Hidden warranty clauses most people miss: Some warranties are prorated, meaning compensation reduces over time. Others cover only replacement of the panel and not labor, transport, or reinstallation costs. So, never overlook the exclusion clauses related to maintenance, environmental exposure, or installation at the time of purchase.
• Delays in replacement or compensation: Even valid claims can take time due to inspection procedures, approval, or stock availability.

How to Protect Your Solar Panel Warranty for 25 Years?

A 25-30 year performance warranty is valuable only if it remains valid for the entire duration. Since warranties can get voided because of improper maintenance and cleaning, you can actually protect your panel warranty through consistent care, proper documentation, and adherence to manufacturer guidelines.

Here’s a simple checklist you can follow:

• Regular cleaning and inspection: Dust, bird droppings, leaves, and pollution can reduce output and create hot spots. Opt for periodic cleaning services from companies like Assure by SolarSquare, as it can help maintain panel performance and prevent avoidable damage. Visual inspections also help detect cracks, loose connections, or corrosion early.
• Annual preventive maintenance: Trained professionals perform yearly inspections to ensure that panels, mounting structures, and electrical connections are checked systematically. This reduces the risk of long-term degradation caused by minor issues that were neglected.
• Keeping documentation and monitoring records: Maintain purchase invoices, warranty certificates, serial numbers, installation reports, and maintenance logs. Performance data from monitoring systems can serve as evidence if you need to prove output loss was not due to negligence during a claim.
• Choosing warranty-safe maintenance providers: Qualified maintenance providers such as Assure by SolarSquare use specialized tools and advanced diagnostics to clean and maintain solar panels. It ensures that your solar warranty remains safe.
• Check solar warranty documents properly: Before installation, read the solar warranty document carefully. Verify coverage duration, degradation guarantees, exclusions, registration requirements, and claim procedures.

Solar Warranty Checklist Before Installing a Solar System in 2026

With electricity tariffs in India rising by 3-6% annually, it’s no surprise that more and more people are going solar. A properly-sized solar system can generate electricity from solar radiation for 25 years. However, 25 years is a very long time. The only way to ensure your panels perform as they should is to be smart about what you purchase.

To help you out, we’ve made this simple solar warranty checklist you can follow.

• Confirm the performance warranty duration: Is it 25 years or more? Request the exact degradation chart in writing, including the guaranteed outputs at 25 years.
• Verify the product warranty period: Is the panel hardware covered for 10, 12, or 15 years? Get clarity on what qualifies as a manufacturing defect.
• Check what is covered and what is excluded: Does the panel warranty cover only the panel replacement, or also transport and labor? Ask which environmental factors are excluded.
• Understand the claim process: Who do you contact first, the installer or the manufacturer? What documents are required? How long does an inspection usually take?
• Ask about workmanship warranty: Does the installer provide written coverage for installation-related faults, and for how many years?
• Confirm installation compliance: Is the installer authorized or certified by the DISCOM to perform solar installations? Improper installation can void the warranty.
• Check warranty registration requirements: Does the manufacturer require online registration after commissioning?
• Clarify maintenance requirements: How often should panels be cleaned? Are there documented service requirements to keep the warranty valid?

Red Flags to Watch Out For that Can Void Your Solar Panel Warranty

Certain poor installation practices can permanently damage your panels and void the panel warranty from day one. Identifying these warning signs early can save you from major financial loss later.

• Unauthorized customization or drilling: Most manufacturers clearly state that the module frame must not be drilled, cut, or altered. Even a small hole in the frame can weaken structural integrity and void warranty coverage. If an installer insists on drilling into the panel frame to adjust or fit it properly, that is a serious red flag.

• DIY installation or repairs: Attempting installation and repairs on your own instead of hiring professionals or allowing unqualified individuals to handle mounting, wiring, or repairs can immediately invalidate the warranty. Even minor electrical alterations done without authorization can be used as grounds to reject a future claim.

How Can Assure by SolarSquare Help You With Solar Panel Warranty?

Assure by SolarSquare provides professional solar panel cleaning and maintenance services for homeowners who may not have ongoing support from their original installer. With operations in cities such as Bhopal, Nagpur, Delhi, and Lucknow (and expanding across India), Assure has already supported 1,000+ customers.

Here’s a list of our Preventive Maintenance (PM) services that help improve your system’s performance and reliability:

• Warranty-safe panel cleaning: Our trained technicians clean your panels using only manufacturer-approved methods. Soft-bristle equipment protects the anti-reflective coating and glass. Every visit includes documentation of before-and-after photos and compliance logs. As a result, your warranty stays intact if you ever need to raise a claim.
• Automated maintenance schedule: We build a cleaning and maintenance calendar around your specific site conditions, dust load, and system size. You get WhatsApp, SMS, and email reminders before every visit. Your full service history, including technician notes, is available for download at any time.
• Performance diagnostics and reporting: We compare your system’s actual power generation with the expected output and review your inverter data. If we detect any drop in performance, we identify the cause and provide you with a clear action plan to recover lost power.
• Electrical and safety check: Trained technicians inspect the wiring, earthing, connectors, and safety devices in your system. They fix loose connections and overheating points on the spot. Each visit also includes checks for DC and AC cables, MCBs and surge protectors, proper tightening of terminals, and seals that keep moisture out.
• Thermal health scan: We use an infrared camera to scan your solar panels and detect issues like hotspots, faulty cells, or shading that you cannot see with the naked eye. Each problem is identified for the exact panel and shared with you as clear images along with a simple list of what needs attention first.

Assure also provides corrective maintenance services when your solar system needs repairs.

• Problem identification: If a panel cracks, the inverter fails, wiring gets damaged, or a protection device stops working, our trained technicians diagnose the issue and clearly explain what went wrong.
• Best fix recommendation: Our team helps you understand the best course of action before arranging the required parts and repairs.
• Repair or replacement services: Once approved, the team fixes the problem and restores your system’s performance.

With Assure by SolarSquare, you do not have to deal with multiple vendors or troubleshoot the issue yourself. One call and the team takes care of everything.

Conclusion

A solar panel warranty is a shield that protects your investment against manufacturing defects and generation losses that are not the result of improper cleaning or poor maintenance on your part.

Always take clarity on warranty duration, degradation guarantees, documentation requirements, and claim procedures beforehand to avoid costly disputes later. After installation, make sure you hire professionals to maintain and clean your panels properly to prevent the panel warranty from getting void.

For the right after sales or solar maintenance services that adheres to manufacturer guidelines, you can get in touch with Assure’s team for free.

If you’re looking to install rooftop solar at your home, you can book a free solar consultation call with SolarSquare. It’s a no-obligation call, meaning you don’t have to buy from us if you are not convinced. You buy only if you are convinced.

Frequently Asked Questions

What to look for in a solar panel warranty?

When reviewing a solar panel warranty, focus on duration and claim conditions. Check the performance warranty period, usually 25-30 years, and review the exact degradation commitment, such as 90% output at 10 years and ~80-85% output at 25 years.

How to claim a solar panel warranty?

These are some general steps you can follow to file a claim properly:

• Identify the issue: Confirm whether the panel has a visible defect or performance has dropped below the guaranteed level.
• Collect documents: Keep the purchase invoice, warranty certificate, panel serial number, installation report, maintenance records, and clear photos of the defect ready.
• Contact the right party: Reach out to your installer as they’re responsible for filing a claim for you.
• Submit required proof: Share all documents and monitoring data to support your claim.
• Allow inspection: The company may conduct a site visit to verify the issue.
• Resolution: If approved, the panel may be repaired, replaced, or compensated in accordance with the warranty terms.

Are 10-year-old solar panels still good?

Yes. When professionally cleaned and maintained, solar panels can continue generating electricity at 90% of their original efficiency even after 10 years.

Can I transfer my solar warranty if I sell my house?

Most reputable manufacturers allow solar panel warranties to be transferred to the new homeowner, but this depends on brand-specific terms. Always review the transferability clause in your warranty document before selling the property to ensure continuity of coverage.

Does a subsidy affect warranty coverage?

No, a government subsidy being offered by the Indian government has nothing to do with the warranty coverage. The panel manufacturer issues the warranty, and it remains valid as long as the installation and maintenance conditions are met.

All solar panels slowly lose efficiency over time. That’s why most brands guarantee that even after 25 years, the panel will still produce ~80-85% of its original power output. This warranty only protects power generation. Manufacturing defects are covered under product warranty, which is usually offered for 10-15 years, depending on the brand.

Here are the main topics covered in this blog in detail:

Main Topics Key Takeaways What is a solar panel warranty? It's a written assurance from the manufacturer that covers panel defects under product warranty and guaranteed power output over time under performance warranty. Why is a warranty on solar panels important? It legally protects your long-term investment by defining when the manufacturer must repair, replace, or compensate for issues that might occur during the solar warranty period. What are the different types of solar warranties?

Usually the coverage of warranties is as below -

Panel product warranty: 10-15 years Solar panel performance warranty: 25-30 years

What’s the difference between a solar panel product warranty and a solar panel performance warranty? Usually product warranty covers manufacturing defects for 10-15 years, while performance warranty guarantees output levels for 25-30 years. What is not covered under a solar panel warranty? Damage from floods, cyclones, lightning, theft, mishandling, external impact, and cosmetic issues that don’t reduce output are usually not covered under a solar panel warranty. What can void your solar installation warranty? Poor or irregular maintenance practices, unauthorized repairs, DIY modifications (handling modifications on your own instead of hiring professionals), non-certified installation, and missing registration or documents can void your solar warranty. How to protect your solar warranty for 25 years? Follow the manufacturer's maintenance guidelines, use trained service providers, maintain cleaning and service records, and regularly monitor panel performance.

DISCLAIMER: Solar panel warranty coverage, duration, claim process, and compensation structure vary by manufacturer, model, and installation standards. Terms may differ based on maintenance compliance and approved installation practices. Always refer to the official warranty document issued by the manufacturer and installer for exact conditions, exclusions, and limitations before relying on any coverage." } },{ "@type": "Question", "name": "What is a Solar Panel Warranty and Why is it Important?", "acceptedAnswer": { "@type": "Answer", "text": "A solar panel warranty is a written assurance from the panel manufacturer that protects you if the module develops defects (covered under the product warranty of 10-15 years) or fails to deliver the promised power (covered under the solar panel performance warranty of 25-30 years).

Since PV panels are expected to last 25 years and are exposed to outdoor conditions every day, panel warranty coverage becomes very important.

Let’s understand why it's so important to have a solar warranty in India.

Legal assurance that binds the manufacturer: The warranty of solar panels defines what the manufacturer is responsible for and under what conditions they must repair, replace, or compensate you. Simply put, it’s your legal defence when something goes awry without any fault of yours. It covers manufacturing defects that are not your fault: Issues such as cell cracks, delamination, or backsheet problems are covered if they arise during the product warranty period. It ensures long-term power output: The solar panel performance warranty guarantees that the panel will continue generating electricity at the committed levels year after year for 25-30 years." } },{ "@type": "Question", "name": "What’s the Difference Between Warranty, Guarantee, and Insurance in solar panel?", "acceptedAnswer": { "@type": "Answer", "text": "Confusion between warranty, guarantee, and insurance usually starts when customers hear terms like 25-year assurance without understanding who is responsible and under what conditions.

Many assume everything is covered for every type of damage, which is not true. Each term defines a different type of protection, and understanding the differences helps avoid solar panel warranty problems and rejected claims later.

Let’s understand what each term means and covers:

Warranty: A panel warranty is the manufacturer’s written promise to repair or replace a solar panel if it develops a manufacturing defect within a specified period. For example, if the module stops functioning due to internal faults or defective cells during the warranty period, the manufacturer will replace it at no cost under the terms of the warranty. There are some terms and conditions under which warranties are promised by the manufacturer. Please ask for necessary documentation regarding the same to your vendor. Guarantee: A solar panel guarantee refers to the power generation commitment. For instance, if the manufacturer or installer promises that the panel will generate a certain percentage of its original output over time, that is a performance guarantee. There are some terms and conditions under which guarantees are promised by the manufacturer. Please ask for necessary documentation regarding the same to your vendor. Insurance: Insurance covers external risks beyond the manufacturer’s control. Damage caused by floods, cyclones, lightning, or other natural disasters falls under insurance coverage. In such cases, the insurance company pays for the damage in accordance with the policy terms." } },{ "@type": "Question", "name": "Why Rs. 2-3 Lakh Solar Investment Needs Legal Warranty Protection?", "acceptedAnswer": { "@type": "Answer", "text": "When you invest a few lakhs in rooftop solar systems, you are planning for 25 years of power generation. And that’s a long time for any electrical equipment to operate outdoors. Over two decades, exposure to heat, humidity, dust, heavy rainfall, and voltage fluctuations can affect performance. Even if panels are designed for durability, unexpected manufacturing defects or early component failures can occur.

A legal solar warranty ensures you are not left bearing the cost if something goes wrong during the covered period.

Not just panels, every major solar component comes with its own warranty timeline.

Solar panels: They have a performance warranty of 25-30 years and a product warranty of 10-15 years. Mounting structures: Product warranty for 10 years and design warranty for 25 years. Solar inverters: They come with a solar warranty of 5 to 10 years, depending on the brand.

Since solar warranty terms vary based on manufacturer and component type, reviewing the exact coverage before installation is essential. Clear documentation protects your investment and defines who’s responsible for which failure from day one." } },{ "@type": "Question", "name": "What are the Different Types of Solar Panel Warranties in India?", "acceptedAnswer": { "@type": "Answer", "text": "Solar panel warranties in India are divided into different types, and each type protects a specific aspect of the panel. Many buyers hear a 25-year warranty and assume everything is covered for 25 years. In reality, one warranty covers manufacturing defects for a shorter period, and another covers the solar panel output for a longer period.

If the panel hardware fails, you rely on the product warranty. If the panel’s power output drops below committed levels, the solar panel performance warranty applies.

Let’s now understand all types of solar warranties in detail.

#1. Solar Panel Performance Warranty

A solar panel performance warranty is valid for 25-30 years. It solely focuses on power generation output. Solar panels produce their maximum rated power in the first year of operation. After that, output declines every year due to natural degradation. The performance warranty guarantees that this reduction will remain within defined limits.

In most cases, manufacturers promise that the solar panel will produce ~90% of its original power after 10 years and ~80-85% output after 25 years.

If the panel’s actual generation falls below the guaranteed levels for no fault of the customer, the manufacturer is obligated by law to address the issue under the warranty terms.

#2. Solar Panel Product Warranty

A panel product warranty lasts 10-15 years, depending on the brand, and covers manufacturing defects in the module’s hardware. It is only applicable when the physical components of the panel fail due to faults during solar panel production.

It can cover the following solar panel issues:

Defective solar cells Delamination or backsheet failure Junction box defects Soldering defects caused during manufacturing Internal electrical faults

Unlike a solar panel performance warranty, which focuses on power output over time, a product warranty addresses the module's build quality and physical integrity.

Solar System Warranty

When evaluating solar warranty coverage for the entire solar energy system, it is important to separately review the warranties of components such as mounting structures and inverters.

These warranties are issued by the respective OEMs and differ from the warranty on solar panels.

Inverter warranty duration: 5-10 years (as per OEM) Mounting structure warranty duration: Product warrant for 10 years and design warranty for 25 years. Monitoring system warranty duration: 5-10 years (as per OEM)" } },{ "@type": "Question", "name": "Solar Panel Product Warranty vs Solar Panel Performance Warranty: What’s the Difference?", "acceptedAnswer": { "@type": "Answer", "text": "It’s easy to confuse a solar panel product warranty with a performance guarantee, since both are marketed together under the 25-year promise. In reality, they protect different aspects of your solar panels. One focuses on physical defects, while the other focuses on long-term power output commitment.

Here’s a side-by-side comparison table that explains both:

Basis of comparison Product Warranty on Solar Panels Solar Panel Performance Warranty What it protects Manufacturing defects in the panel hardware Long-term power output Main focus Physical integrity of the module Power generation performance over time Duration 10 to 15 years 25-30 years When it applies If panel stops working due to internal defects If output drops below guaranteed percentage Who is responsible? Manufacturer Manufacturer" } },{ "@type": "Question", "name": "What Is Covered Under a Solar Panel Warranty?", "acceptedAnswer": { "@type": "Answer", "text": "A solar panel warranty covers technical failures and performance shortfalls that occur during the warranty period. The exact coverage depends on whether you are referring to product warranty, performance warranty, or workmanship warranty, and varies by manufacturer.

Manufacturing defects: Product warranty covers faults that occur in panels during manufacturing. This can include defective solar cells, backsheet failure, delamination, frame defects, or junction box malfunction. If such issues cause the panel to stop functioning within the warranty period, the manufacturer is responsible for repair or replacement. Performance degradation beyond guaranteed levels: Solar panel performance warranty protects against excessive power loss beyond the promised degradation levels. For example, if a manufacturer guarantees 90% output at 10 years, and the panel falls below these thresholds, corrective action is taken. Installation errors covered by workmanship warranty: Separate from the manufacturer’s warranty, installers may offer a workmanship warranty of their own. This covers installation-related faults such as improper mounting, loose wiring, or incorrect handling during installation that lead to performance issues.

DISCLAIMER: Solar panel warranty coverage, duration, claim process, and compensation structure vary by manufacturer, model, and installation standards. Terms may differ based on maintenance compliance and approved installation practices. Always refer to the official warranty document issued by the manufacturer and installer for exact conditions, exclusions, and limitations before relying on any coverage." } },{ "@type": "Question", "name": "What Is Not Covered Under a Solar Panel Warranty?", "acceptedAnswer": { "@type": "Answer", "text": "A solar panel warranty can protect you against manufacturing defects and performance shortfalls, but it does not cover every type of damage your panels may endure over their life. Many solar panel warranty problems and claim rejections happen because customers assume all failures are automatically covered.

So, let’s find out what a solar panel warranty does not cover:

Damage from natural disasters: Extreme weather events and natural calamities such as lightning, floods, or cyclones are outside the manufacturer’s responsibility. Such damage must be covered under a separate insurance policy, as it does not fall within the scope of the panel warranty. Theft or external physical damage: If your panels are stolen or damaged due to vandalism or external impact during maintenance due to stepping on the panels, panel warranty coverage does not apply. Accidental breakage or mishandling: Damage caused during transport, installation errors, drilling, or improper handling is excluded from manufacturer’s warranty. Cosmetic issues that don’t affect performance: Minor scratches, discoloration, or visual changes that do not reduce power output are not considered valid claims. Damages caused due to non-adherence to prescribed maintenance protocols: Every manufacturer has a set of rules for maintenance and cleaning. If a damage occurs due to non-compliance, the manufacturer is not responsible." } },{ "@type": "Question", "name": "What Can Void Your Solar Panel Warranty?", "acceptedAnswer": { "@type": "Answer", "text": "If you ignore the installation and maintenance terms and conditions set by the panel manufacturer, chances are very high that your warranty claim will get rejected.

Here are the mistakes that many people make, only to realize later that the warranty has become void.

Improper or irregular maintenance: Solar panels need periodic cleaning and maintenance performed by verified companies such as Assure by SolarSquare. Heavy dirt buildup, corrosion due to neglect, or lack of routine care can lead to claim rejection if poor maintenance contributed to the issue. Using unauthorized technicians for repairs: If repairs or inspections are carried out by local electricians who are not qualified to perform repairs and maintenance, warranty protection will most likely become invalid. DIY modifications (handling modifications on your own instead of hiring professionals) or structural changes: Drilling into the panel frame, changing the wiring connections, moving the panels without approval, or making physical changes such as cutting the frame, opening the back sheet, or tampering with the junction box can void the warranty immediately. Installation by non-certified installers: If panels get damaged during installation being carried out by someone who is not authorized by the DISCOM to install rooftop solar in India, panel warranty claims may not be honored. Failure to register warranty or maintain documentation: Many brands require product registration after installation. Missing invoices, serial numbers, maintenance records, or commissioning documents can also delay or invalidate claims." } },{ "@type": "Question", "name": "How Can Improper Maintenance Void Your Solar Warranty?", "acceptedAnswer": { "@type": "Answer", "text": "Improper maintenance is one of the most common reasons solar warranty claims get rejected in India. Most manufacturers clearly state that panels must be maintained by trained professionals only. If a defect is traced back to neglect, corrosion, excessive dirt buildup, or poor maintenance, the manufacturer can legally deny the claim.

Manufacturer warranty maintenance requirements: Manufacturers have simple conditions for maintaining the warranty, including periodic cleaning, visual inspections, ensuring proper drainage, and preventing prolonged shading. If maintenance guidelines are not followed and damage occurs as a result, the issue may be classified as preventable rather than a manufacturing defect. Impact of dirt, bird droppings, and corrosion on warranty claims: Heavy dust accumulation, bird droppings, and standing water can accelerate corrosion or create hot spots on modules. When left unchecked, these conditions reduce solar output and even damage components. If performance loss is linked to these poor maintenance practices rather than internal defects, the claim can be rejected." } },{ "@type": "Question", "name": "What are the Common Solar Panel Warranty Problems that Homeowners Face?", "acceptedAnswer": { "@type": "Answer", "text": "A solar panel warranty is extremely reassuring because 25+ years is a long time for panels to malfunction. However, if you do not follow the proper cleaning, installation, and maintenance practices as listed by the panel manufacturer, you may face multiple issues, including claim rejection due to a fault even during the solar warranty period.

Let’s have a look at the most common solar warranty problems that homeowners can face due to ignorance:

Claim rejections due to poor documentation: Manufacturers ask for purchase invoices, serial numbers, installation reports, maintenance records, and performance data. If these documents are missing or incomplete, claims can be delayed or rejected. Disputes between installer and manufacturer: Sometimes the manufacturer may blame the issue on installation faults, while the installer may claim it is a manufacturing defect. This back-and-forth can delay resolution, leaving you stuck in the middle. That’s why you must pick a credible solar installation company with a track record of solid reviews and happy customers. Hidden warranty clauses most people miss: Some warranties are prorated, meaning compensation reduces over time. Others cover only replacement of the panel and not labor, transport, or reinstallation costs. So, never overlook the exclusion clauses related to maintenance, environmental exposure, or installation at the time of purchase. Delays in replacement or compensation: Even valid claims can take time due to inspection procedures, approval, or stock availability." } },{ "@type": "Question", "name": "How to Protect Your Solar Panel Warranty for 25 Years?", "acceptedAnswer": { "@type": "Answer", "text": "A 25-30 year performance warranty is valuable only if it remains valid for the entire duration. Since warranties can get voided because of improper maintenance and cleaning, you can actually protect your panel warranty through consistent care, proper documentation, and adherence to manufacturer guidelines.

Here’s a simple checklist you can follow:

Regular cleaning and inspection: Dust, bird droppings, leaves, and pollution can reduce output and create hot spots. Opt for periodic cleaning services from companies like Assure by SolarSquare, as it can help maintain panel performance and prevent avoidable damage. Visual inspections also help detect cracks, loose connections, or corrosion early. Annual preventive maintenance: Trained professionals perform yearly inspections to ensure that panels, mounting structures, and electrical connections are checked systematically. This reduces the risk of long-term degradation caused by minor issues that were neglected. Keeping documentation and monitoring records: Maintain purchase invoices, warranty certificates, serial numbers, installation reports, and maintenance logs. Performance data from monitoring systems can serve as evidence if you need to prove output loss was not due to negligence during a claim. Choosing warranty-safe maintenance providers: Qualified maintenance providers such as Assure by SolarSquare use specialized tools and advanced diagnostics to clean and maintain solar panels. It ensures that your solar warranty remains safe. Check solar warranty documents properly: Before installation, read the solar warranty document carefully. Verify coverage duration, degradation guarantees, exclusions, registration requirements, and claim procedures." } },{ "@type": "Question", "name": "How Can Assure by SolarSquare Help You With Solar Panel Warranty?", "acceptedAnswer": { "@type": "Answer", "text": "Assure by SolarSquare provides professional solar panel cleaning and maintenance services for homeowners who may not have ongoing support from their original installer. With operations in cities such as Bhopal, Nagpur, Delhi, and Lucknow (and expanding across India), Assure has already supported 1,000+ customers.

Here’s a list of our Preventive Maintenance (PM) services that help improve your system’s performance and reliability:

Warranty-safe panel cleaning: Our trained technicians clean your panels using only manufacturer-approved methods. Soft-bristle equipment protects the anti-reflective coating and glass. Every visit includes documentation of before-and-after photos and compliance logs. As a result, your warranty stays intact if you ever need to raise a claim. Automated maintenance schedule: We build a cleaning and maintenance calendar around your specific site conditions, dust load, and system size. You get WhatsApp, SMS, and email reminders before every visit. Your full service history, including technician notes, is available for download at any time. Performance diagnostics and reporting: We compare your system's actual power generation with the expected output and review your inverter data. If we detect any drop in performance, we identify the cause and provide you with a clear action plan to recover lost power. Electrical and safety check: Trained technicians inspect the wiring, earthing, connectors, and safety devices in your system. They fix loose connections and overheating points on the spot. Each visit also includes checks for DC and AC cables, MCBs and surge protectors, proper tightening of terminals, and seals that keep moisture out. Thermal health scan: We use an infrared camera to scan your solar panels and detect issues like hotspots, faulty cells, or shading that you cannot see with the naked eye. Each problem is identified for the exact panel and shared with you as clear images along with a simple list of what needs attention first.

Assure also provides corrective maintenance services when your solar system needs repairs.

Problem identification: If a panel cracks, the inverter fails, wiring gets damaged, or a protection device stops working, our trained technicians diagnose the issue and clearly explain what went wrong. Best fix recommendation: Our team helps you understand the best course of action before arranging the required parts and repairs. Repair or replacement services: Once approved, the team fixes the problem and restores your system’s performance.

With Assure by SolarSquare, you do not have to deal with multiple vendors or troubleshoot the issue yourself. One call and the team takes care of everything." } },{ "@type": "Question", "name": "What to look for in a solar panel warranty?", "acceptedAnswer": { "@type": "Answer", "text": "When reviewing a solar panel warranty, focus on duration and claim conditions. Check the performance warranty period, usually 25-30 years, and review the exact degradation commitment, such as 90% output at 10 years and ~80-85% output at 25 years." } },{ "@type": "Question", "name": "How to claim a solar panel warranty?", "acceptedAnswer": { "@type": "Answer", "text": "These are some general steps you can follow to file a claim properly:

Identify the issue: Confirm whether the panel has a visible defect or performance has dropped below the guaranteed level. Collect documents: Keep the purchase invoice, warranty certificate, panel serial number, installation report, maintenance records, and clear photos of the defect ready. Contact the right party: Reach out to your installer as they’re responsible for filing a claim for you. Submit required proof: Share all documents and monitoring data to support your claim. Allow inspection: The company may conduct a site visit to verify the issue. Resolution: If approved, the panel may be repaired, replaced, or compensated in accordance with the warranty terms." } },{ "@type": "Question", "name": "Are 10-year-old solar panels still good?", "acceptedAnswer": { "@type": "Answer", "text": "Yes. When professionally cleaned and maintained, solar panels can continue generating electricity at 90% of their original efficiency even after 10 years." } },{ "@type": "Question", "name": "Can I transfer my solar warranty if I sell my house?", "acceptedAnswer": { "@type": "Answer", "text": "Most reputable manufacturers allow solar panel warranties to be transferred to the new homeowner, but this depends on brand-specific terms. Always review the transferability clause in your warranty document before selling the property to ensure continuity of coverage." } },{ "@type": "Question", "name": "Does a subsidy affect warranty coverage?", "acceptedAnswer": { "@type": "Answer", "text": "No, a government subsidy being offered by the Indian government has nothing to do with the warranty coverage. The panel manufacturer issues the warranty, and it remains valid as long as the installation and maintenance conditions are met." } }] }

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