What is the difference between a 12-year product warranty and a 25-year performance warranty?

A 12-year product (workmanship) warranty covers physical defects: delamination, junction box failure, loose frame, or moisture ingress. A 25-to-30 year linear power performance warranty guarantees that the module will output at least 87.4% to 89% of its original rated wattage in Year 25, guaranteeing annual degradation remains below 0.40%–0.55%.

What documents are required to claim solar panel warranty in Pakistan?

To file a valid warranty claim with authorized distributors (like Reon, Diwan, or Netracon), you need: 1) Original sales tax invoice showing panel serial numbers, 2) Clear photo of the frame barcode and in-glass QR code, 3) On-site Voc/Isc multimeter test readings taken at peak solar noon, and 4) Clear photos of the front glass and rear backsheet showing no external physical impact damage.

Why do manufacturers reject solar panel warranty claims in Pakistan?

Common rejection reasons in Pakistan include: 1) Physical glass cracks or footstep damage caused by walking on panels during cleaning, 2) Buying non-official parallel imported grey-market stock without authorized distributor stamps, 3) Melted junction boxes caused by undersized loose DC wiring, and 4) Hotspot burns resulting from uncleared dried bird droppings.

Consumer Rights & Claims

Solar Panel Warranty Claim Process in Pakistan 2026: 25-Year Linear Power Guarantee

By PSI Editorial · 11 min read · Updated September 2026

Testing electrical open circuit voltage on solar panel for warranty claim inspection in Pakistan — PakSolarInsights

📋 Warranty Claim Essentials at a Glance

Product Workmanship Warranty: 12 to 15 Years (Covers manufacturing defects).
Linear Power Warranty: 25 to 30 Years (Guarantees >87.4% output in Year 25).
Turnaround Time for Replacement in Pakistan: 15 to 35 Business Days through official Tier-1 distributors.
Golden Rule: Always buy from Tier-1 AEDB-authorized distributors with matching serial tax invoices.

Atomic Summary: While Tier-1 manufacturers (Jinko, LONGi, Canadian Solar, Trina) offer 12-year product and 25-year performance warranties, over 40% of warranty claims filed by Pakistani homeowners get rejected due to lack of serial-matched invoices, unauthorized imports, or micro-cracks from walking on panels. Follow this verified 5-step process to secure a brand-new free replacement module.

Understanding the Two Types of Solar Warranties

Warranty Type	Standard Duration	What Is Covered?	What Is NOT Covered?
Product / Workmanship	12 – 15 Years	Delamination, yellowing EVA, defective junction box, loose aluminium frame, bypass diode short.	Glass breakage from hail/cricket balls, accidental drops during transport.
Linear Power Degradation	25 – 30 Years	Power dropping faster than guaranteed curve (<% in Year 1, <0.4%–0.55%/yr thereafter; >87.4% in Year 25).	Temporary power loss due to unwashed dust, smog, or external tree shade.

Step-by-Step Claim Filing Procedure in Pakistan (2026)

Step 1: Perform Preliminary On-Site Electrical Tests

Before contacting the dealer, isolate the underperforming panel and conduct these three measurements using a calibrated digital multimeter at midday (11:30 AM to 1:30 PM):

Open Circuit Voltage (Voc): Disconnect MC4 connectors and measure DC voltage across (+) and (-) terminals. If Voc is 33% below datasheet rating (e.g. 34V instead of 51V), one of the internal bypass diodes is blown.
Short Circuit Current (Isc): Measure instantaneous DC current with a DC clamp meter.

Step 2: Collect Required Photographic Evidence

Take 5 mandatory high-resolution photographs:

Clear photo of the frame side barcode sticker and in-glass QR code.
Clear photo of the rear junction box rating plate.
Wide-angle photo showing the entire panel from the front.
Wide-angle photo showing the rear backsheet.
Photo of the multimeter LCD screen showing the measured Voc reading at solar noon.

Step 3: Submit RMA Ticket to the Authorized Importer

Send the documentation package to the authorized Pakistani tier-1 distributor (e.g. Diwan International, Netracon, Reon, or your local EPC installer). The distributor validates the serial number in the manufacturer factory database and issues an official Return Merchandise Authorization (RMA) tracking number.

Step 4: Factory Flash Test & Module Replacement

The local distributor inspects the panel at their testing warehouse in Lahore or Karachi (performing I-V curve trace or Electroluminescence EL testing). Once the defect is verified, a brand-new replacement module of equal or superior wattage is issued within 15 to 30 working days.

Top 4 Reasons Warranty Claims Are Rejected in Pakistan

Footstep Micro-Cracks (Stepping on Panels): When cleaning staff walk across panels, internal silicon cells fracture into spiderweb patterns. Under factory EL test cameras, these micro-cracks glow black, immediately invalidating the warranty.
Grey-Market Smuggled Stock: Panels bought from unauthorized roadside stalls without an official Pakistani distributor serial record cannot be claimed locally.
Loose MC4 Connector Burns: Burnt junction boxes resulting from poor technician crimping are classified as installation negligence rather than a module defect.
Permanent Bird Dropping Hotspots: Hotspot scorching caused by leaving bird droppings unwashed for months voids the backsheet warranty.

Frequently Asked Questions

How long does a solar panel warranty claim take in Pakistan?

Through official Tier-1 authorized distributors (Jinko, LONGi, Canadian Solar), replacement claims typically take 15 to 35 business days.

Who pays for labor and shipping when replacing a defective panel?

The manufacturer replaces the solar module free of charge. However, rooftop de-installation and local freight to the distributor warehouse are generally handled by the homeowner or the installation EPC contractor under their initial 1-year free AMC service contract.