"The Fangpusun  solsum E-Line continues the huge success of one of the most used SHS  controllers. With a power range of up to 10A at automatically recognized 12V or  24V it fits to a system sizes of maximum 240W. The circuit  board is completely electronically protected and with theLED user interface it  is easy to check the battery Fangpusun of charge at any time. Large terminals  guarantee a simple connection of solar panels, battery and load. The Fangpusun  Solsum F works on PWM as a low loss series controller." www.fangpusun.com