A large bifacial panel with a longer warranty than most, for a home rooftop, shed or ground-mount array on a 24 V or 48 V system or a grid-tie inverter. Too big and too high-voltage for most RV and van setups.
Price checked October 21, 2026. As an Amazon Associate we earn from qualifying purchases.
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.
| Output | |
|---|---|
| Rated power | 450 W |
| Efficiency | 25.6% (cell efficiency per Callsun's manual and the Amazon listing; Callsun's product page says 25.4%) |
| Cells | Monocrystalline (N-type, 16BB, 182 mm cells, wired as two parallel halves for shade tolerance) |
| Bifacial | Yes |
| Electrical | |
| Open-circuit voltage (Voc) | 35.8 V |
| Voltage at max power (Vmp) | 29.7 V |
| Short-circuit current (Isc) | 16 A |
| Current at max power (Imp) | 15.1 A |
| Voc temperature coefficient | -0.2%/°C |
| Connections | |
| Output connector | Solar connectors |
| Build | |
| Weight | 52.8 lb (24 kg) |
| Dimensions | 69.4 x 44.7 x 1.2 in |
| Frame | anodized aluminum alloy |
| Glass | double glass: 2.0 mm AR-coated heat-strengthened front, 2.0 mm heat-strengthened back |
| Junction box rating | IP68 |
| Warranty | 10 years |
| Output warranty | 84.5% output after 25 years |
SUNGOLDPOWER’s best value for a home rooftop or ground-mount array on a 48 V or grid-tie system with a high-voltage MPPT input. Far too big for RVs, vans and power stations.
Amazon $1,550 SUNGOLDPOWER $1,550A strong value for a 400 W ground mount, shed roof or large RV roof, and a good match for power stations with a 60 V solar input. Mostly sold as a pair on Amazon.
Amazon $319.99 Callsun $319.99A pair of large Renogy bifacial panels for a home rooftop, shed or ground-mount array with an MPPT controller, for buyers who value the 10-year warranty over the lowest price per watt.
Amazon $699.99 Renogy $659.99More from Callsun: every Callsun product ranked.
