[QUOTE=pwogaman;3153536]I ran this set up for several days straight during a power outage on my 300SD using a Harbor Freight 1500/3000 watt inverter. I clamped the cruise control actuator so the engine ran at approximately 1500 rpm. Below that rpm the voltage began dropping.

What appliances or devices were you running? Any idea on amps or wattage being used? Thanks