I have an old (1968) Kohler 2500W (120VAC) generator that starts automatically (12VDC) on demand and shuts off when the load is removed. I would like to replicate the switching to turn my inverter (120V) on and off automatically as well. It draws 1-2 amp when on. The problem is I don't have the schematic for the generator control box nor a part list. Any help in design and parts needed would be great.