I don't know for sure, but factory units tend to be about 600 watts or so, and there are some aftermarket units up to 1500 watts. Personally, I'd rather have the smaller one, and add an oil heater (dipstick or magnetic).
An amp clamp will tell you the draw for sure, or maybe it's labeled somewhere
An amp clamp will tell you the draw for sure, or maybe it's labeled somewhere
