Compare ET Solar Group ET-M660280BB vs Upsolar Global UP-M305P

Warranty Terms

Output Warranty:

25 Years of 81.4% Output Power

Materials Warranty: 10 Years

Panel Performance

Rated Power: 280 Wp

Efficiency: 17.21 %

Voltage at Maximum Power VMPP: 31.01 V

Current at Maximum Power IMPP: 9.03 A

Open Circuit Voltage VOC: 39.26 V

Short Circuit Current ISC: 9.23 A

Power Tolerance Positive: + 1.5 %

Maximum System Voltage: 1000 V

Solar Panels Thermal Ranges

Operating Temperature Range: -40~85 °C

Temperature Coefficient of Pmax: -0.43 %/°C

Temperature Coefficient of Voc: -0.3 %/°C

Temperature Coefficient of Isc: 0.06 %/°C

Solar Panel Attributes

Weight: 18.5 kg

Cell Type: Monocrystalline

Cell Count: 60

Glass Thickness: unknown

Juntion Box Protection Class: IP 67

Cable Length: unknown

Glass Type: unknown

Warranty Terms

Output Warranty:

unknown

Materials Warranty: 10 Years

Panel Performance

Rated Power: 305 Wp

Efficiency: 15.7 %

Voltage at Maximum Power VMPP: 36.1 V

Current at Maximum Power IMPP: 8.45 A

Open Circuit Voltage VOC: 45.8 V

Short Circuit Current ISC: 8.74 A

Power Tolerance Positive: + 3 %

Maximum System Voltage: 1000 V

Solar Panels Thermal Ranges

Operating Temperature Range: -40~90 °C

Temperature Coefficient of Pmax: -0.43 %/°C

Temperature Coefficient of Voc: -0.3 %/°C

Temperature Coefficient of Isc: 0.05 %/°C

Solar Panel Attributes

Weight: 26.5 kg

Cell Type: Polycrystalline

Cell Count: 72

Glass Thickness: 4 mm

Juntion Box Protection Class: IP 65

Cable Length: 1000 mm

Glass Type: Tempered, High Transmittance