we are offering poly-crystalline silicon solar cells.maximum power (wp) 10wp maximum power voltage (v) 17.5v. maximum power current (a) 0.57a open circuit voltage (v) 21.6v short circuit current (a) 0.61a number of cells (pcs) 36(4*19) pcs size of module (mm) 345x265x18mm( 156*156mm cell) maximum system voltage (v) 715v temperature coefficients of isc (%) 0.065+-0.015%'c temperature coefficients of voc (%) -(2.23+-0.1)mv 'c temperature coefficients of pm (%) -(0.5+-0.05)%'c temperature coefficients of im (%) +0.1'c temperature coefficients of vm (%) -0.38'c temperature range -40'c+85'c tolerance wattage (e.g. +-3%) +-3% glass type tempered glass surface maximum load capacity 60ms(200kgsq.m) allowable hail load steel ball fall down from 1m height weight per piece (kg) 1.2kg junction box type waterproof( tuv ) length of cables (mm) na cell efficiency (%) 17.50% module efficiency (%) 15.80% output tolerance (%) +-3% frame (material, corners, etc.) aluminum standard test conditions am1.5 100mwcm2 25'c warranty 10 years product warranty and 10years 90% of power ff (%) 76% packing 2pcsctn.