Features: Solar charge controller comes with a big LCD display that can clearly indicate status and data it can be conveniently switched modes and parameter configuration. Solar panel suitable for solar system solar street lamp smart home solar light box intelligent irrigation camping lantern etc. solar regulator is only suitable for acid batteries:OPEN AGM GEL not for nickel hydride Liions or other batteries. Short-circuit conservation open-circuit conservation reverse conservation over-load conservation more safty for using suitable for home industrial commercial etc. This controller can only use photovoltaic panel as charging source do not use or other supply as charging source. Specifications: Batt voltage: 12V/24V auto Charge current: 20A Discharge current: 20A Equalization: B01 sealed 14.4V B02 Gel 14.2V B03 flood 14.6V Float charge: 13.7V(defaul adjustable) Discharge stop: 10.7V(defaul adjustable) Discharge reconnect: 12.6V(defaul adjustable) USB output: 5V/3A Self-consume: <10mA Operating temperature: -35~+60 degree C Weight:150g Size:13.3*7*3.5cm Packing List: 1X 20A Solar Charge Contorller 1X English User Manual