SMS series on/off grid auto switching single phase Solar pv Inverter 1000W/transformerless/DC to AC is an innovative product for grid tie and off grid solar power system, which auto switch to connect grid or stand alone. if the PV panel can not produce enough power to loads, the other parts power will take from grid. It is a super inverter. It not only creates a low carbon life for you, but also could make a profit for you.

Sunfine SMS inverter is an innovative product for grid tie and off grid solar power system, which auto switch to grid tied or stand alone mode. Grid tide mode is preferred always. When the grid and PV panel running well, SMS will feed in the power to loads, at the same time charging battery, and the excess power will feed-in grid; when grid has fault, after very short time, SMS inverter will switch to stand-alone mode. In off grid case, PV power is preferred, if solar power is not enough, battery will make up the rest within 10 mins, after battery will take over panel as power source.

And SUNFINE SMS series inverter can be stacked.

pure sine wave DC to AC single phase on off grid auto switch 4KW Solar pv Inverter