Methods and apparatus which use a microinverter comprising integrated neutral forming function for off-grid facilities are provided herein. For example, a microinverter configured for use with an AC storage system comprises switching circuitry connected at an AC output of the microinverter, a three-line connector connected at the AC output and comprising a neutral line connected between two lines configured to connect to at least one of a single phase grid system or a split phase grid system, wherein the neutral line is connected to the microinverter at a point that maintains a mid-way voltage between the two lines voltage.