Battery disconnect switch on or off when on shore power?

You're probably wondering whether to keep your battery disconnect switch on or off when on shore power, and the quick answer is that in almost every situation, you want it in the "on" or "connected" position. Leaving it on ensures your RV's converter can actually reach the batteries to keep them charged up while you're enjoying the amenities of a campground. If you flip that switch to "off" while plugged in, you might find yourself with a dead battery exactly when you need it most. ...

February 21, 2026 · 6 min · Aguilera Teachers