Solar panels

Qcells Q.TRON BLK M-G2+ Solar Module

Name: Qcells Q.TRON BLK M-G2+ Solar Module
Brand: Qcells

Qcells Q.TRON BLK M-G2+Broad installer availability 71% data complete

$386 – $386

per module (not an installed system) · 1 seller · seen 2026-08-16

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.

See the 1 listing this comes from →

21.4-22.5% efficient n-type module, the volume choice for US residential installs.

Our take

This is the sensible default. Efficiency within two points of the premium modules, a 25-year warranty, US manufacturing presence, and installed by nearly everyone — which means competitive quotes and someone who can service it. Most homeowners choosing between this and a premium module are paying for a difference they will never observe.

Best for

The majority of residential rooftop installations with adequate roof area.

Watch out for

Degradation of 0.33%/yr is slightly worse than the premium tier; over 25 years that is a couple of percent of lifetime output.

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	Qcells Q.TRON BLK M-G2+ single module Q.TRON BLK M-G2+ 430W	$386	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.

JA Solar DeepBlue 4.0 Pro (JAM54D41) Solar Module

22-22.8% efficient module with a notably shorter product warranty than every other panel in this catalog.

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.

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.

Specifications

Performance

How much of the sunlight it turns into electricity?

22%% efficient — in line with nearly every other panel in this catalog; on a roof with adequate area, cost per watt will matter more than this number

Solar module efficiency and degradation comparison · tier 4

22%

Module efficiency

On a large, unshaded roof this number matters far less than cost per watt. It only becomes decisive when usable roof area is genuinely the limiting factor.

How much power it gives up on a hot afternoon?

Gives up about -0.3%/°C%/°C above 25°C — a typical mid-pack rate for a hot climate

Solar module efficiency and degradation comparison · tier 4

-0.3%/°C

Temperature coefficient

In a cool, cloudy climate this figure barely matters. In Phoenix, Dallas or south Florida, it is arguably more decisive than the headline efficiency percentage every spec sheet leads with.

How much power one panel produces?

430 WW per panel — determines how many panels a given system size needs; higher isn't automatically better if it means a larger, heavier module

Manufacturer submittal and specification sheets · tier 3 · unverified

430 W

Panel rated power

Durability

How much output it loses each year?

Loses about 0.33%/yr%/yr — a solid mid-pack rate, in line with most mainstream panels sold today

Solar module efficiency and degradation comparison · tier 4

0.33%/yr

Annual degradation

This is the manufacturer's own published warranty curve, not an independent field measurement. No free, public dataset of actual measured field degradation per model currently exists (see the P2 audit) — treat it as the maker's own bet on their product, backed by the power warranty, not as a verified fact.

Ownership

How long the maker's promise runs?

25 yr-year product warranty — the category norm

Solar module efficiency and degradation comparison · tier 4

25 yr

Parts warranty

A warranty is only worth what the company behind it can still deliver in year 20. Panasonic (April 2025), LG (2022), and a long list of earlier manufacturers (BP Solar, Solyndra, Schott Solar, SolarWorld and others) have all exited solar manufacturing well inside their own warranty terms — see the manufacturer_discontinuation_warranty_risk finding in this category's regret map. This number is a stated promise, not a survival probability, and no scored attribute anywhere can supply the second thing.

Every value above is stored with the document it came from and the date it was read. How we resolve conflicting sources →