The wires work very well plugged directly into the inverters, i appreciate the help but didn't want to say that step 1 was a bit obviouse, i've had el wire a lot longer than i've had an arduino!
Steps 2 and 3 will be tried in the morning, thank you again for your time.
I've also found out that the inverter supplied by sparkfun runs at up to 3.5khz so the frequency might not be a problem.