Buy best solar pure sine wave inverter on powmr.com, we all four differences typs, all in one inverter chargers, power inverter, hybrid inverter and on grid inverter. Basic knowledge of solar charge controller. The solar charge controller is mainly designed for two basic matters in the solar power system: when there is no sunlight, stop the power from the battery through the solar panel, and optimize the solar panel to the battery cycle Charge. The dual-battery solar charger can charge two batteries at the same time, and is generally used in the RV solar power generation system to charge the RV starter battery and the RV owner battery. Usually does not have the load output function. The MPPT Solar Charge Controller can be perfectly combined with grid-connected solar modules. Another significant advantage of the MPPT solar charge controller is that you can save a lot of cable and wiring costs, which means that smaller wiring or wiring can be used.