Hi LGH, today i worked on my power jack and the configuration you draw, i'm a little bit confused, i tryed the configuration above, but did not work, and then i changed to just one transformer and turned the inverter on, this time i found one problem, when the inverter is in idle, the voltimeter shows 110ac, but under load, the voltagge gos to 139, i do not know what is going on, onother thing; i thought if the problem should be the ground, i did not put any ground wire becouse i don't know were go, and need the GND wire. Thank you. NJM