The Callsun 450W N-Type 16BB Bifacial Double-Glass Rigid Solar Panel (CS450-M2HD2608, White Grid) is the better rigid solar panel overall, rated 4.2 to 4.0. The Callsun 450W N-Type 16BB Bifacial Double-Glass Rigid Solar Panel (CS450-M2HD2608, White Grid) leads on durability. The HISHEN FLOWE 495W N-Type Frameless Dual-Glass Rigid Solar Panel (HN-SP-495W-N-CE-1, UL 61730) wins on value. The HISHEN FLOWE 495W N-Type Frameless Dual-Glass Rigid Solar Panel (HN-SP-495W-N-CE-1, UL 61730) costs $20 less ($349.99 vs $369.99).
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.
Amazon $369.99A frameless dual-glass large panel for home rooftop, shed or ground-mount buyers who want edges that shed dirt and snow. The missing electrical specs make it a harder buy than framed panels with full data sheets.
Amazon $349.99Prices were last checked October 21, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Each factor is scored 0-100 against the same fixed reference points for every 150 w and up rigid solar panel; a clear win is highlighted. How we rank explains each one.
| Factor weight | Callsun 450W N-Type 16BB Bifacial Double-Glass Rigid Solar Panel (CS450-M2HD2608, White Grid) | HISHEN FLOWE 495W N-Type Frameless Dual-Glass Rigid Solar Panel (HN-SP-495W-N-CE-1, UL 61730) |
|---|---|---|
| Overall rating | 4.2/5 | 4.0/5 |
| Value 45% | 65 $0.82 per rated watt | 76 $0.71 per rated watt |
| Tested output 15% | 50 not yet independently tested (neutral score used) | 50 not yet independently tested (neutral score used) |
| Durability 25% | 100 IP68, 10-year warranty | 60 no IP rating, 10-year warranty |
| Efficiency 15% | 100 25.6% claimed efficiency | 100 25.6% claimed efficiency |
| Callsun 450W N-Type 16BB Bifacial Double-Glass Rigid Solar Panel (CS450-M2HD2608, White Grid) | HISHEN FLOWE 495W N-Type Frameless Dual-Glass Rigid Solar Panel (HN-SP-495W-N-CE-1, UL 61730) | |
|---|---|---|
| Output | ||
| Rated power | 450 W | 495 W |
| Efficiency | 25.6% (cell efficiency per Callsun's manual and the Amazon listing; Callsun's product page says 25.4%) | 25.6% (cell efficiency, as published in the title) |
| Cells | Monocrystalline (N-type, 16BB, 182 mm cells, wired as two parallel halves for shade tolerance) | Monocrystalline (N-type, 16BB, Grade A+) |
| 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 | 70 x 45 x 1.2 in |
| Frame | anodized aluminum alloy | frameless ("Cleanedge" design) |
| Glass | double glass: 2.0 mm AR-coated heat-strengthened front, 2.0 mm heat-strengthened back | 2.0 mm dual-glass |
| Junction box rating | IP68 | - |
| Warranty | 10 years | 10 years |
| Output warranty | 84.5% output after 25 years | - |
