... BatteryHigh efficiency, maintenance free lead acid battery 12V 50AH ; Solar panel frameAluminum, ejection plastic,IP54 cable2.5mm²*1solar professional use ... the daylight and uses in the night, it doesn’t need the expensive and complex pipe laying, the layout ... be adjusted arbitrarily, safety ,energy saving without pollution, doesn’t need manual operation, works stable and reliably, save electricity , ...