I do believe it is for the block heater. I do not believe it will be wired to your inverter. It could be I guess but I would think the block heater would draw a lot of amps and kill batteries fast. Our block heater is in the electrical bay and has its own breaker. When I want to use it I plug it in and turn on the breaker. This is after I have the rig plugged into the house. Happy Camping.
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2005 GS Crescendo (8356) w/2003 Wrangler toad
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