A solar panel warranty is only as valuable as your ability to claim it. Adani Solar offers one of the more detailed warranty structures in the Indian market, a 12-year product warranty backed by the manufacturer and a linear power output guarantee of 25 years (monofacial) or 30 years (bifacial and TOPCon). But most buyers who receive a warranty card at installation have no idea what these warranties actually cover, what voids them, how to make a claim, or what compensation they can expect. This guide answers every one of those questions.
Key takeaway. Adani Solar panels carry a 12-year product warranty (covering defects in materials and workmanship) and a linear power output warranty of 25 years on monofacial Mono PERC (minimum 93.05% at Year 10 and 84.8% at Year 25) or 30 years on bifacial and TOPCon modules. Claims are filed with Adani Solar directly using the invoice and panel serial numbers. Heaven Green Energy is a certified Adani Solar channel partner and registers each client’s warranty at commissioning, making claims significantly easier.
Understanding your warranty before a problem arises, not after, is the difference between a resolved claim and a years-long dispute.
The Two Types of Adani Solar Warranty
Adani Solar’s warranty card (covering modules made by Mundra Solar Energy Ltd and Mundra Solar PV Ltd from 1 November 2021 onward) sets out two distinct warranties:
1. Product Warranty (12 years)
This covers defects in materials and workmanship that cause the panel to fail. Typical examples:
- Delamination of the encapsulant (EVA or POE layer)
- Junction box failure, moisture ingress, or connector failure
- Frame deformation or corrosion under normal conditions
- Backsheet cracking or delamination
- Cell microcracks from manufacturing
Under the 12-year product warranty Adani Solar will, at its discretion, repair or replace a defective panel or refund its depreciated price. Cosmetic changes (scratches, stains, minor rust) are not treated as defects, and glass breakage is covered only where there was no external cause. For replacements, Adani bears reasonable insurance and transport costs (except air freight).
2. Linear Power Output Warranty (25 or 30 years)
This is the performance guarantee. It specifies the minimum output the panel must deliver at standard test conditions (STC: 1000 W/m², 25°C cell temperature, AM 1.5 spectrum). For monofacial Mono PERC (ASM series) modules:
- Year 1: Not less than 98% of rated output
- Year 2 to 25: Maximum 0.55% degradation per year
- At Year 10: Not less than 93.05% of rated output
- At Year 25: Not less than 84.8% of rated output
Bifacial Mono PERC modules carry a 30-year warranty (98% in Year 1, at most 0.45% a year, 84.95% at Year 30), and N-type TOPCon modules a 30-year warranty (99% in Year 1, at most 0.40% a year, 87.4% at Year 30). Only front-side power is warranted on bifacial panels.
For a 545W monofacial panel, this means: at Year 25, the panel must produce at least 462.2W under STC conditions. If it falls below the warranted value because of a defect, Adani Solar will repair or replace it, or supply additional modules to make up the lost power.
Field degradation varies with site conditions, so the warranty floor is a minimum, not a forecast. For a deeper breakdown of how actual field degradation compares to the warranty floor across brands, see our solar panel degradation vs warranty guide. The Adani Solar product catalogue and BIS certification portal can be used to verify that any Adani Solar panel you receive matches the manufacturer’s official specifications.
💡 Fast tip
Keep a copy of your inverter's monthly generation log from Year 1 onward. If you ever need to claim under the power output warranty, the generation history is the evidence that shows your panels may be underperforming; the claim itself is settled by STC testing of the module.
The Degradation Guarantee: What 84.8% at Year 25 Actually Means
The output warranty is often misunderstood. Buyers sometimes think “84.8% at Year 25” means the panel produces 84.8% as much electricity as on Day 1. That is incorrect.
The 84.8% (for a monofacial Mono PERC panel) refers to 84.8% of the nameplate rated power at STC, not 84.8% of Day-1 actual output. Here is the distinction:
- Nameplate rating: 545W (what’s printed on the label, rated at STC conditions)
- Day-1 actual output: May be 545W or slightly higher (due to positive watt tolerance or LID stabilisation effects)
- Year 25 warranted minimum: 545W × 84.8% = 462.2W at STC
In real-world conditions, the Year 25 output also depends on your site’s irradiance, temperature, soiling, and shading, factors outside the warranty. The warranty only covers STC-condition performance.
What the linear degradation guarantee looks like as a table (monofacial Mono PERC, from Adani’s warranty card):
| Year | Minimum Output (% of Rated) | Minimum Watts (545W panel) |
|---|---|---|
| 1 | 98.00% | 534.1W |
| 5 | 95.80% | 522.1W |
| 10 | 93.05% | 507.1W |
| 15 | 90.30% | 492.1W |
| 20 | 87.55% | 477.1W |
| 25 | 84.80% | 462.2W |
What the Product Warranty Does and Does Not Cover
Understanding warranty exclusions is critical. Adani Solar’s product warranty covers defects in materials and workmanship only. The following are not covered:
Not covered by either warranty:
- Physical damage from hail, lightning strike, storm, flood, or fire
- Damage from incorrect installation (wrong wiring, improper mounting angle, unauthorized modifications)
- Soiling, dirt buildup, or bird droppings reducing output, this is not a product defect
- Damage from grid overvoltage or installation-side electrical faults
- Damage caused by insects or animals
- Output loss due to shading from newly constructed structures
Conditions that lead to a refused claim:
- Serial numbers removed, made illegible, or altered
- Panel modified, tampered with, or repaired by someone other than Adani’s authorised technicians
- Installation not complying with Adani Solar’s installation manual
- Use outside the specifications in the module datasheet
- No proof of full payment (invoice) or a shipping address that does not match the invoice
The specific exclusions are detailed in the warranty document issued with the panel. Always read the warranty card before installation, not after a failure occurs.
How to Make a Warranty Claim: Step by Step
If you believe your Adani Solar panel has a manufacturing defect or is underperforming relative to the output warranty, here is the claim process:
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Document the issue. Take clear photographs of the defective panel showing the fault (delamination, junction box damage, cell discolouration). If the issue is output-related, export a monthly generation report from your inverter monitoring portal. Our guide to solar generation monitoring explains how to extract these reports from major inverter brands.
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Locate your warranty card and serial numbers. You need the warranty card issued at installation and the serial numbers of the affected panels. Heaven Green Energy delivers the warranty card at commissioning with a full list of installed panel serial numbers.
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Report the claim to Adani Solar within one week. The warranty card asks for the claim to be reported within one week of becoming aware of the problem, by email to cs@adani.com (Adani’s contact page also lists resolution.solar@adani.com for complaints and technical support, and +91 90990 08887 for technical queries). Include: your name and address, the installer/seller, a copy of the invoice, panel model and serial numbers, the installation test report, maintenance records, and a description of the defect with photographs.
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Adani Solar verification. Adani may visit the site and ask for generation, installation and O&M records. Output claims are judged by STC testing under IEC 60904.
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Resolution. If the claim is valid, Adani Solar repairs or replaces the panel (an equivalent or higher-power model if the original is discontinued), refunds the depreciated price, or for an output claim supplies additional modules. Adani bears reasonable transport and insurance costs for replacements; mounting any additional modules is at the customer’s cost.
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Disputes. If you disagree with the decision, the warranty card provides for testing by an ISO 17025 accredited laboratory (such as TÜV Rheinland India or UL India), with the cost borne by the losing party, and does not stop either side going to court in India. In Gujarat, Heaven Green Energy also assists our clients with escalations through our channel partner relationship.
⚠️ Watch out
The output warranty claim requires proof that the underperformance is a panel issue, not a soiling or shading issue. Before filing a claim, clean all panels thoroughly and verify there is no new shading (from trees, buildings, or new construction) that could explain the output drop.
Adani Solar Warranty vs. Other Major Panel Brands
| Brand | Product Warranty | Output Warranty | Year 25 Min Output | Claim Ease (India) |
|---|---|---|---|---|
| Adani Solar | 12 years | 25 yrs (mono PERC) / 30 yrs (bifacial, TOPCon) | 84.8% (mono PERC), 89.4% (TOPCon) | High (India-based service) |
| Waaree | 12 years | 27 yrs (Arka mono PERC) / 30 yrs (Elite TOPCon) | About 84.8% (Arka), 89.4% (Elite) | High (India-based) |
| Vikram Solar | Check current datasheet | Check current datasheet | Check current datasheet | High (India-based) |
| Tata Power Solar | Check current datasheet | 25 years on modules (Tata Power Solaroof) | Check current datasheet | High (India-based) |
| LONGi Solar | Check current datasheet | Check current datasheet | Check current datasheet | Medium (overseas manufacturer) |
| Jinko Solar | Check current datasheet | Check current datasheet | Check current datasheet | Medium (overseas manufacturer) |
Source: Adani Solar warranty card and Waaree Arka and Elite datasheets (Year 25 values read from the published linear curves). Terms for the other brands vary by model, so read the warranty document for the exact model you are quoted.
Indian manufacturers have an advantage for warranty claims: the claim is handled in India, and disputes can be escalated through Indian consumer protection mechanisms via the National Consumer Helpline. Warranties from overseas manufacturers can mean slower, harder-to-enforce claim processes from India.
For a full comparison of panel brands available in India, see our solar brands Gujarat comparison guide. If you’re weighing Adani specifically against its closest Indian competitor, our Adani vs Waaree solar panel comparison breaks down price, efficiency, and warranty differences in detail.
The Paperwork Gap: Why Some Claims Fail
Here is a fact that surprises most solar buyers: Adani’s warranty starts from the tax invoice date, and a claim needs proof of full payment, an invoice that matches the delivery address, intact serial numbers, and the installation and maintenance records. If those papers are missing, a claim can legitimately be refused even when the panel is faulty.
Keep these together from day one:
- Panel serial numbers
- The tax invoice and installation date
- Installer name and contact
- End customer name and installation address
Adani Solar’s website also has a warranty certificate page where you can download a certificate by entering module serial numbers (with OTP verification). For background on how the BIS, IEC, and ALMM certification requirements behind that verification process work, see our solar quality certifications guide. At Heaven Green Energy, warranty registration is part of our standard commissioning checklist, we register every panel’s warranty within 48 hours of commissioning.
If you installed Adani Solar panels through another installer, collect the invoice and serial numbers now and download your warranty certificate at adanisolar.com/warranty-certificate.
Pros and Cons of Adani Solar’s Warranty Structure
- Backed by Adani Group's balance sheet, among India's strongest guarantors
- Online warranty certificate download by module serial number
- India-based service team, faster inspection and replacement
- 12-year product warranty, and 30-year output warranty on TOPCon with an 87.4% floor at Year 30
- Monofacial Mono PERC gets 25 years of output cover, not the 30 years on bifacial and TOPCon
- Rear-side power on bifacial panels is not warranted
- Claims can be refused if installation does not follow Adani's installation manual
How Heaven Green Energy Supports Adani Solar Warranty Claims
As a certified Adani Solar channel partner, Heaven Green Energy provides three layers of warranty support:
- Registration at commissioning: every panel serial number is registered through our channel partner portal within 48 hours of commissioning.
- Claim filing assistance: for clients who need to file a claim, our team prepares the documentation package and liaises with Adani Solar’s regional service manager.
- Output monitoring: our clients have access to inverter monitoring portals that track generation against expected values, making output warranty claims data-driven rather than anecdotal.
- Solar modules page: Adani Solar panels available through Heaven Green Energy.
- Solar panel warranty explained: general warranty guide for all brands.
- How to verify genuine Adani panels: authentication before installation.
- Contact our team: get Adani Solar installation with guaranteed warranty registration.
Ready to install? We handle Adani Solar warranty registration, MNRE documentation, and net metering, start to finish. Call +91 63904 05060 or request a callback.
Frequently Asked Questions
What is covered under Adani Solar’s 12-year product warranty?
The 12-year product warranty covers defects in materials and workmanship, such as delamination of the encapsulant, junction box failure or moisture ingress, backsheet cracking, and cell defects from manufacturing. It does not cover cosmetic changes, physical damage from external causes (natural disasters, lightning, surges, accidental breakage), soiling, or incorrect installation.
What does the power output warranty guarantee?
For monofacial Mono PERC panels, the 25-year linear output warranty guarantees at least 98% of rated output in Year 1, at least 93.05% at Year 10, and at least 84.8% of nameplate wattage at Year 25, all measured under Standard Test Conditions (1000 W/m², 25°C), with degradation capped at 0.55% per year from Year 2. Bifacial and TOPCon panels carry a 30-year warranty; TOPCon is guaranteed 99% in Year 1, at most 0.40% a year after that, and 87.4% at Year 30.
How do I file an Adani Solar warranty claim in India?
Email Adani Solar at cs@adani.com (or resolution.solar@adani.com for complaints and technical support) within one week of noticing the problem, with the invoice, panel serial numbers, installation and maintenance records, and photographs of the defect. Adani may inspect the site before deciding. If the claim is valid, the panel is repaired or replaced and Heaven Green Energy (as your channel partner) can facilitate the replacement installation.
Does my Adani Solar warranty transfer if I sell my home?
Yes, as long as the panels stay where they were originally installed. Adani’s warranty card makes the warranty transferable to a new owner only on that condition, and the new owner is bound by the same exclusions. Provide the new owner with the original invoice, warranty certificate and serial number list so they can continue to access warranty support.
What voids the Adani Solar warranty?
Claims are refused for: (1) Misuse, accident or damage from external causes such as natural disasters, lightning or surges, (2) Modification, tampering, or repair by someone other than Adani’s authorised technicians, (3) Removing, altering or making the serial number illegible, (4) Installation that does not follow Adani Solar’s installation manual, (5) Use outside the module datasheet specifications, (6) No proof of full payment.
How long does an Adani Solar warranty claim take to resolve?
Adani does not publish a fixed claim timeline. The warranty card says that where a discontinued model has to be replaced with another model, this is done within 6 weeks of the registered complaint date for domestic customers. A complete claim file (invoice, serial numbers, test report, photographs) is the best way to avoid delays.
What if Adani Solar stops operating, is the 25-year warranty still valid?
The warranty is given by the manufacturing companies, Mundra Solar Energy Ltd and Mundra Solar PV Ltd, which are part of the Adani Group. A large group lowers the risk compared with a small manufacturer, but no warranty is risk-free. For added protection, keep the invoice, warranty certificate and serial numbers in your own possession (not just with the installer), so you can claim directly even if the installer changes.