... ,stations ,airway ,industry and mineral,frontier,islands,pastoral areas ,solar offgrid power system ,ect .2.Characteristics♦ MCU intelligent control, ... ,installation&consideration ♥This product is suitable for the soalr modules with same voltage grade and power to charg battery.Do ... first ,then connect with the soalr modules ,or else ,the empty –load voltage of solar modules will be too high and destory ...