Voltage at campground low ??

Low camp site power is quite common. More than 10% low and your asking for trouble.

I'm not seeing a question here. It's not uncommon to find voltage variations at campgrounds - especially older ones. What SoundGuy is talking about is an EMS that will take your rig off-line if the voltage become low enough (or high enough) to damage appliances such as ACs, refrigerators, microwaves, TVs, etc. We have a 50-amp hardwired EMS in our RV and I wouldn't be caught without it. It has saved us thousands of dollars in damage over the last three years of full-timing.

That said, 100V is OK as long as it doesn't go any lower under a load.

Rob

As long as it maintains that voltage, it's fine. If it drops when air conditioner is on, that's not fine.

???

The key is that it still IS in the green.

Some systems, older ones especially, are perfectly "normal" with a voltage that low.

Might want to verify that with a second voltmeter though.....as you probably should be suspicious if it really is any lower than 110.

Ergo the reason every RV owner who plugs into campsite service would do well to protect their rig's electrical system with an EMS, the PI EMS-PT30X being an example.