The most professional manufacturer of poly solar panel in China; CE TUV certified; Fast delivery; Quality guranteed; Material: anodized aluminum frameSolar cell: 72 pieces polycrystalline (156 x 156)Front glass: 3.2mm, temperedJunction box: IP65Minimum power tolerance: ±3%Output cables: 900mm length cable, compatible with MC IV connectorsAllowable hail load: 1040±2g steel ball fall down from 1m heightDimensions: 1968*990*50mmWeight: 18.6kgTemperature coefficients: Nominal operating cell temperature: 47 ± 2°CVoltage temperature coefficient: -0.3 ± 0.05%/°C (Voc)Current temperature coefficient: 0.065 ± 0.015%/°C (Isc)Power temperature coefficient: -0.5 ± 0.05%/°C(Pmmp)