I have a SY380 Motor drive single phase to 3 phase on a 2.2kw water pump. If i put it on the output of my invertor the Invertor display jumps all over the place and it trips The earth leakage. ( motor is not even through it) If i feed back unto the motor on the input side of teh invertor it works 99% of teh time but also tripping non related earth leakage. I am going off grid soon and need to solve this problem so it can run on the output.

Any help from any one ?