... % in 10 years , 80% in 25 years . a grade solar cell to produce . POLYCRYSTALLINE SOLAR PANEL 230W ... : 7.70A Open circuit voltage: 36 V Short circuit current: 8.54 A Working temperature: -40°C----85° ... frame3.Life time:20-30 years4.Temperature co-efficiency:A=+1,46mA, B=-79mV,Rp/p=0.435.Power ... 1KV schottky by pass diodes included 8.Construction: a.Fromt high-transmission 32mm tempered glassb.Back:TPTc. ...