... 3) Ip55 protection 4) Certification: CE, ISO9001 CE 12 volt 10 amp solar charge controller Product Description:Light control+time control ... 24VTemperature compensation-3.9mv/°C/2V(Boost charge Direct charge Float charge Charge return voltage);Environmental temperature-35°C-+65 ... reverse connect protection, When storage battery reverse connect, controller is not working2,LED open circuit and short ...