Hello all. I have a 36v battery pack for my offgrid tiny home. Been surviving on single phase with a 3kw inverter, and I'm wondering if I can purchase another inverter and wire both into an autotransformer to get a split phase connection? The two questions I know I have are.if the autotransformer can align the different phase inputs and also if the lack of the external ground relay(I could open it up and look) is an issue. Thanks for any information in advance