How to safely use electric heat in an RV

By Cheri Sicard
Electric heat in an RV can feel like either the simplest thing ever or a fast track to melted plugs and a fire.

Jared Gillis from All About RVs lands in the middle. Electric heaters can be used safely, but only if the RV’s wiring, outlets, and heater load are treated like the weak links they can be.

In the video at the end of this post, Jared shares how to do it with practical checks and small upgrades that he has used for years to keep electric heat useful and keep the risk low.

Start with the most important step: Know the RV’s circuits

Many RVs weren’t built with a 1,500-watt space heater in mind. In Jared’s RV, most usable outlets are tied to one main circuit, plus a separate circuit for GFCI receptacles. Plugging a couple of heaters into “random” outlets can overload that single circuit fast.

A simple way to map an RV’s outlets is to shut off one breaker at a time and test which outlets go dead:

• Turn off the breaker labeled for receptacles (if labeled).
• Use an outlet tester or small plug-in device to check which outlets still work.
• Repeat until it’s clear which outlets share each breaker.

Once that’s known, it’s easier to plan where a heater can run without stacking other loads on the same line.

Add a dedicated heater outlet (and avoid shared loads)

Jared solved the overload problem with a straightforward mod. He added a breaker in the panel and installed an outlet right next to the electrical panel. That kept wiring runs short and made the setup predictable.

A dedicated outlet means the heater isn’t competing with a microwave, coffee maker, or battery charger on the same circuit.

Many factory RV outlets are built to be cheap and compact. The wire connection is often a press-in style, not the screw-terminal connection found on many residential outlets. Less contact area can mean more resistance, and resistance creates heat.

Jared tested an RV outlet against a residential outlet. With a heater load, the RV outlet didn’t go above 87 degrees inside, and the face was barely warm. The residential outlet showed similar temps. Even so, for long-term confidence, he still prefers residential-style outlets and has been swapping them in, including behind the RV fireplace (which is basically a built-in space heater and often on its own circuit).

Know what the heater actually draws, not just the label

Two heaters can both claim 1,500 watts and still pull different amounts of power. One unit Jared referenced had a stamp around 1,221 watts.

To check real usage, he recommends using a Kill A Watt-style meter briefly to measure watts on high and low. That number matters because a 15-amp circuit tops out at 1,800 watts, and for continuous use (3 hours or more), staying near 80 percent is the safer target: 1,440 watts. Pushing past that for long stretches can heat connections, cool down, then heat again, and that cycle can lead to a failed outlet, a tripped breaker, or worse.

Extra exterior power inlets can help, but they add maintenance

Some RVers add a separate power inlet so a heater can run from a 15- or 20-amp pedestal outlet, separate from the RV’s main shore cord. Jared sees the upside for 30-amp rigs that hit their limit quickly. On a 50-amp setup, it can be unnecessary.

The tradeoff is another outdoor connection to inspect. Winter weather adds moisture, condensation, and corrosion risk. He suggests checking for heat at plugs and inlets, keeping contacts clean (he mentions DeoxIT), and avoiding loose connections. If upgrading the connection point, RV SmartPlug is one option he calls out.

Heater types he trusts when away from the RV

When Jared isn’t in the RV, he limits electric heat to two options:

• Heat pumps (when temps stay mild): A heat pump can work well above about 32 degrees.
• Xtreme Heaters for the underbelly niche: Jared uses Xtreme Heaters mounted in the RV’s underbelly to help prevent a specific freeze issue near the kitchen sink when temperatures drop into single digits. It also helped the RV feel less cold through the floor.

He doesn’t treat it as a way to “winterize with electric,” and he notes they’re expensive. The features that made it feel like the right tool for that job include:

1. Mil-spec rating for humidity, vibration, and extreme temperatures
2. IP68 waterproofing (can be temporarily submerged)
3. PTC self-limiting heating element to reduce overheat risk
4. Engine-compartment rating (flammable fumes)
5. Built-in thermostat
6. Mountable design

The bigger strategy, electric heat plus the furnace

Jared still runs the RV furnace because it helps protect plumbing in freezing temperatures. Electric heat is used as a helper, stretching propane so fill-ups happen less often. In some parks, it can feel close to free since electric is included, but the key is still managing the load safely.

For comfort in serious cold, he also found skirting made a big difference, especially for longer stays.

Final thoughts

Electric heat in an RV can be safe, but it shouldn’t be treated like a plug-and-forget appliance. The setup that works long-term is simple: Know the circuits, avoid weak outlet connections, measure heater draw, and stay under the continuous-load limits. Add in regular checks of cords and exterior plugs, especially in wet winter weather, and the risk drops fast.

For anyone trying to stay warmer while using less propane, a careful electric heat plan is a solid place to start.

RELATED

• How to stay warm in an RV in winter: Insulate, heat, and protect
• The best electric heaters under $25 for small RVs
• Which is better—and more affordable—for heating your RV: gas or electric?

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