How To Protect Your Appliances With An RV Voltmeter

This page is part of a sequence of questions on our RV electrical systems section. You can browse the rest of the related questions at the bottom of this page.

Whenever your appliances are receiving too much or too little power, they are at risk of some major damage. There are many ways you could be receiving the wrong amount of power, including the following:

Your generator might be fluctuating too much, meaning you might have an internal problem with your generator. If you are plugged in at a camp ground and it is a hot day, most people could be using their air conditioners. This would affect how much power you receive from the shore power outlet and could potentially harm your appliances.

Using A Voltmeter For Prevention

The voltmeter I use. Easy to see red and green areas let you know at a glance if you're getting inconsistent voltage. Click the picture to check it out at Camping World--a definite worthwhile investment.

With so many different ways you could be receiving improper amperage there is luckily one easy way to test for problems. An RV voltmeter is a simple, effective, and inexpensive tool that could save you thousands.

You can buy an easy-to-read RV voltmeter that will show you when you are receiving low or inconsistent voltage, and they plug directly into any outlet. The one I use points to green when safe and red when accessories should be turned off to prevent damage. I like to plug mine in right by the entry step so I can glance at it when I go in and out of my RV.

You can get the exact same one I use at Camping World here. I recommend it because its red and green color coding makes it real easy to read--just a quick glance and you can tell if your appliances are at risk of damage.

Continue Following The Electrical Systems Question Series

How much power can I use in my RV?

How many appliances can I run at once?

Which appliances use the most power?

How to protect your appliances with an RV voltmeter. (Here now)

What adapters do I need for my RV?

Have your own question? Ask it!

Return from RV Voltmeter to RV Electrical Systems main page

Enjoy this page? Please help us pay it forward to others who would find it valuable by Liking, Sharing, Tweeting, Stumbling, and/or Voting below.

Have a question about this topic?

Have a question about your RV? Chat with an expert one-on-one now.*

*Chat provided by, a third party not affiliated with MSRVR

Have an RV Question?

RV Question Man

Ask A Pro

Browse Visitor Questions

Kind Words From Our Visitors

More visitor testimonials

Robbie Warford, San Diego RV Repair

Hi, I'm Robbie. Welcome to!

Like the name implies, this site is all about helping you save money while keeping your RV in tip-top shape--and that is all about you having the knowledge to do so.

I've been a technician in the RV industry for 30 years, operating out of San Diego, California. And let me tell you, I love my job.

But I also love empowering RVers with the knowledge they need to make the right decision on repairs, or to make the fix themselves--and that, my friend, is the reason for this website. I hope you enjoy.

Or, learn more about me, my RV service practice, & this website here.