Hybrid solar energy storage systems has mainly four kinds: On grid and off grid solar energy storage system, on grid solar energy storage system, off grid solar enegry storage system and microgrid solar energy storage system On off grid solar system is the real hybrid solar system, which can sale extra electricity to national grid, local grid also can charge storage batteries via hybrid inverter. Our hybrid inverter follow the standard of UL1701, CSA, VDE, CE, TUV,,,etc, 10 years warranty.