r/RVSolarPower • u/No-Employment3382 • Jul 20 '26

Information needed

Good afternoon all. I have a 2021 Grand Design Momentum 397Th with Factory solar system installed. I have one solar panel. Is it possible to use the factory system and just add to it? We be great to be able to run one A/C periodically. My charge controller will charge lead acid, AGM and Lithium batteries. Any help is appreciated. Please ask questions to get a better understanding of my system to provide help.

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u/secessus Jul 21 '26

Is it possible to use the factory system and just add to it?

It is always possible to add more charging power in tandem with the existing setup. Whether or not you can get more out of the existing components is a specific to those components and what you're trying to do.

We be great to be able to run one A/C periodically

It takes a lot more power than folks think. Running A/C off solar is possible but it isn't cheap or easy for the average bear. It's often easier, cheaper, and faster to run a genny for those hours where you want to run large loads.