A budget all-black rooftop panel from one of the largest makers, for homeowners who want a long warranty at the lowest price per watt.
Portlandia Electric Supply $198 Solar Cellz USA $202.02
A low-cost all-black panel from a top-tier maker for a home rooftop, especially in snowy areas. Confirm stock before planning around it.
- 455 WRated output
- $0.53Price / W
- 39.1 VOpen-circuit voltage
- 50.7 lbWeight
- 25 yearsWarranty
Price checked October 26, 2026. As an Amazon Associate we earn from qualifying purchases.
- Among the cheapest of the big-brand rooftop panels, at about 53 cents a watt
- Rated for 8100 Pa snow loads, suiting heavy-snow regions
- 30-year output warranty
- At about 71 x 45 in and 51 lb it is larger and heavier than most 108-cell panels
- Hard to find in stock: most US solar stores list it as sold out
- The 25-year product warranty applies only to rooftop installs in certain regions
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its size. How we rank explains each one.
Specifications
| Model number | CS6.1-54TM-455H |
|---|---|
| Output | |
| Rated power | 455 W |
| Module efficiency | 22.3% |
| Claimed efficiency | 22.8% ("module efficiency up to 22.8%" (465 W version); the 455 W version is 22.3%) |
| Cells | Monocrystalline (N-type TOPCon, 108 half cells) |
| Bifacial | No |
| Electrical | |
| Open-circuit voltage (Voc) | 39.1 V |
| Voltage at max power (Vmp) | 33.2 V |
| Short-circuit current (Isc) | 14.6 A |
| Current at max power (Imp) | 13.7 A |
| Voc temperature coefficient | -0.2%/°C |
| Series / parallel | Yes |
| Connections | |
| Output connector | T6, MC4, MC4-EVO2 or MC4-EVO2A |
| Build | |
| Weight | 50.7 lb (23 kg) |
| Dimensions | 70.9 x 44.6 x 1.38 in |
| Frame | anodized aluminum alloy, black |
| Glass | 3.2 mm tempered, anti-reflective coating |
| Junction box rating | IP68 |
| Warranty | 25 years |
| Output warranty | 30-year linear: no more than 1% loss in year 1, then no more than 0.4% a year |
Alternatives in this size
A rock-bottom-price pair of 100 W panels for a 12 V shed, boat or small off-grid setup. Buyers who want a documented panel from an established maker should pay a little more for Callsun or Renogy.
Amazon $89.99A North American-made all-black rooftop panel for homeowners or installers who want domestic supply and a strong 30-year output warranty. Register it to get the full 25-year product warranty.
SolarTown $245.99 Solar Cellz USA $279.32Compare
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