Compare Solar Panels & Manufacturers

Compare SunPower SPR-X21-345-COM vs Atsun ATM-20(18W)

SunPower

SPR-X21-345-COM

Model: SPR-X21-345-COM

Series: X-Series X22-345-360W-COM

Manufacturer: SunPower

Rated Power: 345 Wp

EnergyPal SunPower Solar Panels X-Series X22-345-360W-COM SPR-X21-345-COM
Warranty Terms

Output Warranty:

unknown

Materials Warranty: 25 Years


Panel Performance

Rated Power: 345 Wp

Efficiency: 21.2 %

Voltage at Maximum Power VMPP: 57.3 V

Current at Maximum Power IMPP: 6.02 A

Open Circuit Voltage VOC: 68.2 V

Short Circuit Current ISC: 6.39 A

Power Tolerance Positive: + 5 %

Maximum System Voltage: 1000 V


Solar Panels Thermal Ranges

Operating Temperature Range: -40~85 °C

Temperature Coefficient of Pmax: -0.29 %/°C

Temperature Coefficient of Voc: -0.4 %/°C

Temperature Coefficient of Isc: 0.02 %/°C


Solar Panel Attributes

Weight: 18.6 kg

Cell Type: Monocrystalline

Cell Count: 96

Glass Thickness: unknown

Juntion Box Protection Class: IP 65

Cable Length: unknown

Glass Type: Tempered, Anti-reflection Coating, High Transmittance

Atsun

ATM-20(18W)

Model: ATM-20(18W)

Series: ATM20

Manufacturer: Atsun

Rated Power: 18 Wp

EnergyPal Atsun Solar Panels ATM20 ATM-20(18W)
Warranty Terms

Output Warranty:

unknown

Materials Warranty: unknown


Panel Performance

Rated Power: 18 Wp

Efficiency: 10.3 %

Voltage at Maximum Power VMPP: 17.5 V

Current at Maximum Power IMPP: 1.03 A

Open Circuit Voltage VOC: 21.5 V

Short Circuit Current ISC: 1.1 A

Power Tolerance Positive: + 3 %

Maximum System Voltage: 1000 V


Solar Panels Thermal Ranges

Operating Temperature Range: -40~85 °C

Temperature Coefficient of Pmax: -0.521 %/°C

Temperature Coefficient of Voc: -0.395 %/°C

Temperature Coefficient of Isc: 0.057 %/°C


Solar Panel Attributes

Weight: 2.4 kg

Cell Type: Monocrystalline

Cell Count: 36

Glass Thickness: unknown

Juntion Box Protection Class: unknown

Cable Length: unknown

Glass Type: unknown