Solar Warranty Guide for Pakistan
A solar system has several warranties, not one. Panels usually carry a product warranty and a separate performance warranty. Inverters and batteries have their own terms, and installation work may be covered separately by the seller. Each depends on the maker, the seller and how the system is installed and used. This guide explains the types, what voids them and what papers to keep. Our own terms are on the Warranty page (Return & Refund Policy).
Updated 12 November 2026
The warranties in a solar system
- Panel product warranty: covers defects in materials and build, such as a failed junction box or delamination.
- Panel performance (power) warranty: promises the panel will still give a stated share of its rated power after a number of years.
- Inverter warranty: covers the inverter's electronics.
- Battery warranty: covers the battery, often with limits on cycles, energy throughput or years.
- Workmanship: covers the installation itself, such as structure, wiring and connections. This comes from the installer, not the maker.
Warranty periods differ by brand, model and market. Always read the datasheet and warranty card of the exact model you receive.
Product warranty vs performance warranty
These two are often confused. The product warranty covers the panel breaking or failing. The performance warranty covers the panel slowly producing less than promised. Many tier 1 panel datasheets list a performance warranty of 25 years or more, with a small drop in year one and a fixed yearly loss after that. A claim under performance warranty usually needs proof, such as a test by an approved lab, so it is harder to use than a product claim. Keep that in mind when a seller only talks about one big number.
Also note who gives the warranty. A maker's warranty may be valid only in the countries where that maker supports it, and in practice most Pakistani buyers deal with the seller or the brand's local partner. Ask how that works before you buy.
Why a long warranty number is not enough
A 25-year promise only helps if the company behind it will still be there and can be reached from Pakistan. Brands with local service teams, spare parts and a record of honouring claims give more real protection than a bigger number on a sticker from an unknown maker. When comparing offers, look at who stands behind each part and how easy it is to reach them, not only at the years printed on the card.
Inverter warranty
Inverter terms depend on the maker and the country of sale. Some makers offer longer cover if you register the inverter online after installation. Damage from lightning, wrong wiring, water entry or voltage surges is usually not covered, which is why a proper surge protection device (SPD) and earthing are worth having. Keep the inverter's serial number and register it if the maker allows.
Also keep the inverter's firmware up to date when the maker or installer advises it, and do not change grid or battery settings in the app unless you understand them. Wrong settings can damage the battery and lead to a dispute over who is at fault. If you are unsure, ask the installer to set it and note the settings in your records.
Battery warranty
Lithium battery warranties are often limited by years and by how much energy has passed through the battery. Running it outside the maker's temperature range, or with an inverter that does not communicate with it, can affect a claim. Tubular battery terms often require proper water topping and a working charge controller. A swollen, leaking or very low-voltage battery caused by misuse is usually excluded. See our battery guide (Lithium vs Tubular Battery: Which Is Better for Solar?) for care tips.
What usually voids a warranty
- Physical damage: cracked glass, bent frames, people walking on panels.
- Installation not following the manual, such as wrong string voltage or no earthing.
- Opening or repairing the inverter or battery yourself.
- Lightning or surge damage without protection.
- Water damage from mounting the inverter outdoors without the right protection rating.
- Removed or damaged serial labels.
- Mixing old and new batteries in one bank.
The exact list is in each warranty card, so read it before installation.
Papers and photos to keep
- The invoice, with brand, model, wattage, quantity and serial numbers.
- Warranty cards or online registration confirmations.
- Photos of the installation and of each label on the day of installation.
- Inverter app data or screenshots, which help show when output dropped.
- A record of battery water topping and panel cleaning.
Store copies on your phone and in email. Most claims fail because papers are missing, not because the fault is unclear.
How a claim usually works
1. Note the problem: error codes on the inverter, app graphs, photos.
2. Contact the seller first with the invoice and serial numbers.
3. The seller or the maker's local service team checks the fault, often remotely through the inverter app, then on site.
4. If the fault is covered, the part is repaired or replaced as the warranty states.
Ask before buying who handles claims in Pakistan for each component and how long a check usually takes.
Questions to ask before you buy
- What exact model of panel, inverter and battery will I receive?
- Which warranties apply to each, and who handles a claim in Pakistan?
- Do I need to register the inverter or battery online?
- What proof will be needed, and how long does a check usually take?
- Is installation work covered, and for how long?
- What happens if a part is faulty on delivery?
Get the answers in writing, on the invoice or in a message. A clear answer is worth more than a big warranty number that nobody can explain.
Our warranty and checking period
We do not list made-up warranty years on this guide. The terms that apply to your order, including the 7-day checking warranty after delivery, are on our Warranty page (Return & Refund Policy). During the checking period, test the system under normal loads and tell us at once if anything does not work as it should. For order and delivery steps, see how to order (How to Order).