Solar panels
JA Solar DeepBlue 4.0 Pro (JAM54D41) Solar Module
7 of 10 catalogued products have a real, seller-observed per-module price from Solar Cellz USA (store.solarcellzusa.com), a public online solar- equipment retailer selling individual modules ($201-$400/panel range observed). That is 70% coverage — meets the >=70% P3c/P7 gate exactly, not comfortably. The 3 unpriced products (Maxeon 7, LONGi Hi-MO X6 Scientist, JinkoSolar Tiger Neo) sell almost exclusively through installer/distributor channels rather than public retail; left unpriced rather than estimated, per this project's no-invented-numbers rule (see price_seed.py's own note on this). Two priced observations are for a smaller-wattage or earlier-generation module from the same manufacturer (REC's older 420W Alpha vs. the catalogued Pure-RX; Canadian Solar's TOPHiKu6 vs. the catalogued HiKu7) and are flagged as proxies, not exact SKU matches, in price_seed.py directly.
22-22.8% efficient module with a notably shorter product warranty than every other panel in this catalog.
Our take
The efficiency and temperature coefficient are competitive with the rest of this catalog, but the 15-year product/workmanship warranty is a real outlier — every other panel here carries 25 years or more. The 30-year power (performance) warranty is normal; it's specifically the workmanship coverage that's shorter, and that's the one that matters if a frame or junction box fails rather than the cells degrading.
Best for
Buyers who have specifically compared warranty terms and are comfortable with a shorter product-defect warranty in exchange for price.
Watch out for
Read the warranty documents yourself — a 15-year product warranty sitting next to a 30-year power warranty on the same spec sheet is easy to misread as one 30-year warranty.
What sellers are actually charging
Real listings, read on the date shown. Prices change — click through to check before you act on any of them.
| Seller | What you get | Price | Seen |
|---|---|---|---|
| Solar Cellz Inc
online retailer |
JA Solar DeepBlue 4.0 Pro single module
JAM54D41-440-MB |
$262 | 2026-08-16 |
Equipment price is not installed price. The listings above are what the hardware costs. Installation — labour, electrical, refrigerant lines, permits, removing the old system — is typically a similar amount again, and varies more between contractors than between brands. Where we have an installed figure it is labelled as such and comes from someone who actually installs.
Compare against
Canadian Solar HiKu7 Solar Module
21.6-22.7% efficient module positioned on cost per watt rather than peak specification.
JinkoSolar Tiger Neo (JKM-N-54HL4R-BDB) Solar Module
21-22.5% efficient N-type module substituting for LG in this catalog, since LG exited solar panel manufacturing in June 2022.
Maxeon 7 Residential Solar Module
24.1% efficient module with a 40-year warranty and the lowest degradation rate on the market.
Mission Solar MSX10 N-Type 108HC Solar Module
22-22.8% efficient module manufactured in San Antonio, Texas — the only US-manufactured panel in this catalog.
Before you buy this
Ask what the production estimate is based on — an actual shading analysis or a rule of thumb — and what export rate it assumes; net metering rules move the payback more than any panel spec. Confirm the quote isn't still claiming the 30% federal credit: it expired for anything placed in service after 31 December 2025. If financed, ask for the all-in cost including interest, not just the monthly payment.