Open a solar warranty claim with a folder, not with a recollection. The folder holds the serial, a flash report or the invoice, dated photos, a monitoring export, and the date the symptom started. The warranty is a contract. The remedy is whatever that contract says. Field studies of how modules age live on another page. A claim uses the contract's test and the contract's remedy.
Five items, and the gaps you admit
The serial on the label, photographed, should match the serial in the monitoring portal. If they differ, say so in the first note. Do not reconstruct a serial from memory. A flash report is a measured power for that module or that shipment. An invoice shows what was bought and when. Send both when you have them. Send the one you have, and name the one you lack, rather than waiting for a perfect archive that will not appear.
Photos need dates: the symptom, the label, and the inverter screen if the fault is there. A monitoring export that shows when the curve changed is stronger than a single sunny-hour screenshot. A screenshot that carries a date is still better than a blank email. If the portal only stores a short history, export it now, before it rolls off. Write the date the symptom started even if the curve is already gone.
The date, and what else happened that week
The date is how a maker separates a defect from a later event: hail, a roof repair, a tree that grew into the string, a wash that struck the glass. Note those events if they happened. The file is weaker when the date is a guess. What to record at commissioning is the folder you wanted on day one: serials, measured string voltages, settings, labels. If those papers exist, attach them. If they do not, say they do not. Original string voltages, when you have them, show whether a dull string was dull from the start.
Visible damage has its own sort. Dirt or damage on a solar panel decides whether you are looking at a film you may wash or a crack, a burnt cell, or a yellowed backsheet you should photograph and leave. Washing a cracked module before the photos is how the evidence changes. Take the pictures first.
The contract, and the life of the modules
What a panel warranty can cover, and how a workmanship promise differs from a performance promise, is in what a solar panel warranty covers. Read the PDF for this array. The years are the years in that PDF. How long solar panels last holds the field studies of degradation. Leave those medians on that page. Do not paste a study result into the claim as if it were this module's test.
File the claim against the product that failed, with that product's serial. An inverter warranty and a module warranty are different contracts, often with different clocks and different companies. A fault code belongs with the inverter serial. A cracked laminate belongs with the module serial. Sending both, clearly labeled, is fine. Sending one story that mixes them is how the claim waits in the wrong queue. Keep a copy of everything you send, including the date you sent it.
Ask for the installer's workmanship terms in the same week. A manufacturer claim and an installation claim can both be real, and they travel in different envelopes. The module serial supports the manufacturer. The contract and the commissioning date support the workmanship file. A string that was low on day one shows up in the measured voltages. A string that fell later shows up as a bend in the monitoring export. Put the fact you have in the folder. Do not invent a replacement wattage the contract never printed.
