High efficiency good solar panel price 1)Mono crystal solar panel 2)Cetificate:ISO,CE,ROHS,TUV 3)OEM 4)Life ... span 25year Mono Crystalline Silicon Solar Panels 250WPITEM ... 25’C Warranty: 5 years product warranty, 10years for 90% power ,25years for 80% power; SolarHigh quality, lower solar panel price