Thread: custom shutdown controller for inverter usage

those who dont know already, i have decided to go the inverter route for my carpc. so i decided to try and design my own simplistic shutdown controller. here is my diagram. tell me what you think:



for those curious, here's how the setup works:

Key On: Relay #2 (middle) turns on inverter and relay#1 (left) momentarily activates the power switch on the motherboard and computer turns on. when the computer turns on relay #3 (right) adds an extra closed ciruit to the inverter power switch.
Key Off: Relay #2 turns off and removes the first closed circuit from the inverter switch, but relay #3 is still on so the inverter stays on. relay #1 pulses the motherboard power switch again which shuts down (or hibernate, your preference) the computer. once the computer goes off, the 12V power is removed from relay #3 which ends up opening the last circuit keeping the inverter on. at this point the inverter shuts off.