2, scenery complementary controller [WPVS economical controller with PWM charge control mode with battery charging reverse, photovoltaic cells, reverse connect protection function, two road load over current, short circuit alarm protection function, two road load multiple control modes: electric, control, full open function, when the battery charge and discharge the alarm protection function, under the two different road load voltage protection function, pv input lightning protection, battery temperature compensation function, prolong the service life of the battery system faults protection function, RS485 communication function, working status and power generation data can be real-time uploaded, the background (extensible GPRS wireless, TCP/IP communication cable) electric lights: automatically turn on the light and dark dawn automatically turn off the lights.'