Since you had to ask, just get an electrician. Since you installed 2 GFCI"S on the same circuit, you obviously don't know what you are doing.
Given your description, there might be a ground fault in the wiring somewhere. I've dealt with finicky ground faults on fire alarm wiring throughout an old building and the culprit is usially from some meathead contractor who did sloppy work, pulling too hard stripping insulation, not running cables incorrectly and laying a big bundle of wire over another wire causing tension elsewhere down the line.
The best scenario is to wire up a new dedicated 20A circuit using a high quality, even hospital grade plug. You won't even need a GFCI circuit in this scenario because the EVSE will act as the GFCI.
Given your description, there might be a ground fault in the wiring somewhere. I've dealt with finicky ground faults on fire alarm wiring throughout an old building and the culprit is usially from some meathead contractor who did sloppy work, pulling too hard stripping insulation, not running cables incorrectly and laying a big bundle of wire over another wire causing tension elsewhere down the line.
The best scenario is to wire up a new dedicated 20A circuit using a high quality, even hospital grade plug. You won't even need a GFCI circuit in this scenario because the EVSE will act as the GFCI.
