Overview
Solar panel
405W · 20.7% efficiency · Monocrystalline solar panel by JA Solar
Power
405W
Efficiency
20.7%
Voc
37.23V
Warranty
12-year product warranty / 25-year linear warranty
Price
$150
$150.08
at A1 SolarstoreImages
Where to Buy
Affiliate links — we may earn a commission. Learn more
Price History
All-time low: $141.50 at A1 Solarstore (March 19, 2026)
Pros and Cons
Pros
- Good efficiency (20.7%) — solid output for its size
- High wattage (405W) — 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) | 405W |
Efficiency | 20.7% |
Open Circuit Voltage (Voc) | 37.23V |
Max System Voltage | 10001500V |
Physical Characteristics
Cell Type | Monocrystalline |
Frame Color | black |
Connector Type | Stäubli MC4-Evo2 |
Temperature Performance
Operating Temperature | -40°F to 185°F |
Warranty
Product Warranty | 12-year product warranty / 25-year linear warranty |
Physical Dimensions
Weight | 47.4 lbs |
Dimensions (L × W × H) | 67.8" × 44.6" × 1.18" |
Related Calculators & Tools
Roof Solar Power Calculator
Estimate how much solar power your roof can produce based on location and panel specs.
Solar Panel Angle Calculator
Find the optimal tilt angle for your solar panels based on your latitude.
Series/Parallel Calculator
Calculate combined voltage, current, and power for panels wired in series or parallel.
Solar Charge Controller Calculator
Size your charge controller based on your solar panel array and battery bank.
Where to Buy
Affiliate links — we may earn a commission. Learn more
Price History
All-time low: $141.50 at A1 Solarstore (March 19, 2026)
JA Solar JA Solar 405W Solar Panel 108 Cells JAM54S31-405/MR Clearance from
Check Best Price $150.08
