solar light 1. save 80% power than other solar company's 2. longer 3-5 rainy days than other solar company's solar light solar panel Mono/polycrystalline silicon power: 20Wp-50Wp, Life span 25 yearsBattery High efficiency, maintenance free lead acid battery 12V 25AH*1pcs -12V 60Ah 1pcsController 12V 5A, IP67 and over charge and discharge protectionwaterproof and temperature compensation and so on ...