Overview
Solar panel
440W · 20.3% efficiency · Monocrystalline solar panel by JA Solar
Power
440W
Efficiency
20.3%
Voc
53V
Isc
10.44A
Warranty
12-year product warranty and 25-year linear power output warranty
$250.16
at A1 SolarstoreImages
Where to Buy
Affiliate links — we may earn a commission. Learn more
Price History
All-time low: $209.20 at A1 Solarstore (February 13, 2026)
Pros and Cons
Pros
- Good efficiency (20.3%) — solid output for its size
- High wattage (440W) — fewer panels needed for your system
- Monocrystalline cells — better performance in low light and heat
Cons
- No manufacturer documentation available on our site
Specifications
Electrical Specifications
Rated Power (Pmax) | 440W |
Efficiency | 20.3% |
Open Circuit Voltage (Voc) | 53V |
Short Circuit Current (Isc) | 10.44A |
Voltage at Max Power (Vmp) | 44.87V |
Current at Max Power (Imp) | 9.81A |
Max System Voltage | 10001500V |
Physical Characteristics
Cell Type | Monocrystalline |
Cells in Series | 78 |
Strings in Parallel | 2 |
Frame Color | silver |
Connector Type | QC 4.10(1000V) or QC 4.10-35(1500V) |
Temperature Performance
Temperature Coefficient (Voc) | -0.264%/°C |
Temperature Coefficient (Pmax) | -0.333%/°C |
Operating Temperature | -40°F to 185°F |
NOCT | 44.07°C |
Warranty
Product Warranty | 12-year product warranty and 25-year linear power output warranty |
Physical Dimensions
Weight | 54.23 lbs |
Dimensions (L × W × H) | 85.83" × 39.21" × 1.57" |
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Where to Buy
Affiliate links — we may earn a commission. Learn more
Price History
All-time low: $209.20 at A1 Solarstore (February 13, 2026)
JA Solar JA Solar 440W Solar Panel 156 Cell JAM78S10-440/MR Clearance from
Check Best Price $250.16
