You will need a full 12 volts for the level system to work well. If there isn't any shore power nearby you have to use battery. Plugging into your truck likely won't cut it. With your truck running you could use jumper cables from your truck battery directly to your RV battery. That should allow you to use your level system.
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Jeff & Sandi (and Teddy - 7lb Schnorkie)
2018 Montana HC 305RL / HW Progressive EMS
2015 RAM 3500 Laramie Longhorn Crew Cab 4x4 DRW / Demco Recon Hitch on RAM Puck Ball
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