Welcome aboard! The 331RL is one of our favorite floor plans.
We don't have solar or an inverter so I'm just guessing. But it seems that there would be some kind of automatic cross-over/transfer switch or relay. I don't know where to direct you to look for it but maybe you can see where that equipment is managed to see if there is a bad switch.
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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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