this is what i did:
that's the most recent with pics of my shuttle wired up. I didn't use a cap, so no delay, but it shuts the inverter off after the computer shuts down (leaves on if computer hangs, but that shouldn't happen...much )
Also uses this for com port trigger: New shutdown controller - software
more in-depth info: I've soldered in my relay 4 different ways and it still won't work. Help please.