Do Camper Outlets Work On Battery?

When you return to your camper after a day enjoying the great outdoors, having power at your fingertips is important. The wall plugs in the camper bring power to your small appliances and to anything you plug into those outlets. But, how do those outlets work when you are wild camping versus plugged in at a campground? Do camper outlets rely on a battery? We've researched all you need to know about powering camper outlets to answer these questions for you.

The camper's outlets are powered by one or more batteries. The outlets will deliver electricity when the camper is moving, is plugged into shore power, and when the camper is out in the woods far from a power source.

A lot goes into powering your camper or RV.  Keep reading to see how it all works so you may sleep easy at night in your camper.

An SUV towing a camper trailer with mountain bikes clamped on the back of the camper, Do Camper Outlets Work On Battery?

How Does A Camper Get Power?

All powered RV's and campers have at least one battery that is different from the chassis battery for the engine or the towing vehicle's engine. The chassis battery in an RV is often connected to the in-house battery for powering the living space. But the chassis battery's main function is sending the electrical current to the alternator for starting the vehicle's engine.

Check the owner's manual for the location of the camper's battery system if it is not obvious. Twelve volts of battery power is the minimum standard. A 12 volt should last 24 hours with moderate use. The camper may have one 12 volt battery or two 6 volt batteries in series.

If you want more power, add more batteries to the series. Some larger RVs come with six 12 volt batteries in the battery compartment.

When the camper is in a campground or at your home, you can plug the battery system into the power source to receive shore power.

What is AC/DC power?

The power that comes out of the power source or out of one's house outlets is Alternating Current (AC), and the power that comes out of the camper's outlets is Direct Current (DC). The camper's battery system will have an inverter for converting AC power into DC power.

The camper may have some of the AC going straight to the air conditioner, especially if the rig has more than one air conditioner on top. If a smaller air conditioner is plugged into the camper's outlet, it is using DC power. This is especially important to know when you go to replace the air conditioner unit.  Sometimes the microwave and bigger lights are hardwired to the electrical system to use AC power as well.

Are RV Outlets The Same As House Outlets?

A truck towing a camper trailer on a long stretch of highway

RV outlets can give the same power, 15 to 20 AMPS, as house outlets but are designed differently. In a house, the outlet has a box attached to the wood studs of the wall. Inside the box, the wires of the plug are attached to the wiring of the house.

Since the RV is a smaller space, the walls do not have studs. Instead of using a household outlet box, choose an RV outlet box that is thinner with all the wiring complete inside. Replacing one involves removing it and plugging the same model into the wall hole.

Why May Camper Outlets Stop Working?

Camper outlets may cease to work if too many things are plugged into the electrical system, an outlet has gone bad, or the camper has experienced an electrical surge.

Check if the outlets themselves have the Ground-fault Circuit Interrupters (GFCI) on them. GFCI outlets are more sensitive than the camper's circuit breakers themselves. If a GFCI is tripped, press the black button to restore the outlet. If this doesn't restore the outlet, check the camper's circuit breaker box as the circuit itself may need to be reset. It is a good idea to bring the owner's manual with you when you need to open the circuit breaker box.

If pressing the GFCI to reset or flipping the circuit breaker back into place doesn't fix the problem, it is wise to seek a certified RV technician to diagnose and fix the problem in the electrical system.

If you are good with electrical systems, you may use a multimeter to test the voltage on the outlets. Replacing is a bad outlet is a relatively easy repair for someone with some electrical skills.

 Click here to see a multimeter on Amazon.

Dead In-House Battery

If nothing electrical is working in the camper, the battery system may have run out of juice. It will need to be recharged with shore power or with a portable generator or if you have solar panels.

Battery Power and Shore Power

A charging station for EV's

When the camper has access to shore power, it is smart to plug it into the power source. The power source often offers two types of plugs: the 30 amp plug and the 50 amp plug. The RVs with 30 amp shore plug usually have smaller RV size appliances, one air conditioner, and fewer outlets. The RV with a 50 amp shore plug may have household-size appliances, one or two air conditioners, and more outlets.

The 30 amp plug has three prongs and carries 120 volts and 30 amps for 3,600 watts of energy for the RV. The 50 amp plug has four prongs, which includes two prongs each carrying 12o volts and 50 amps for 6,000 watts each or 12,000 watts total.

It is helpful to have a 30 amp/50 amp adapter to attach to your power cable, so you can plug it into all types of power sources. But if the power source gives 30 amp power even with the converter,  you will still only be receiving 30 amps.

Click here to see an adapter plug on Amazon.

A surge protector is also super handy when connecting to shore power. The surge protector will keep your RV and its electronics safe if there are any power surges from the shore power.

Click here to see an example of a 30 amp surge protector on Amazon.

What Runs Off Battery In A Camper?

When plugged into shore power, the outlets are all live running off the battery system.

All of the outlets are running off of the battery because of their need for DC power. Any appliances that need DC are also running off the battery. These might include the microwave, lighting, TV, sound system, and water pump. Small air conditions might also be running off of the battery system.

If your RV has household-sized appliances and larger air conditioner units, which are AC-powered, these will also run off the battery but through the inverter, which converts the DC power to AC power.

Does An RV Battery Charge When Plugged In?

Camper trailers lined up outside a camping ground

When the RV uses shore power, the battery system is charging.  The battery will also be charged by the RVs' engine when driving. Some will have plugs that attach to the pickup or SUV's electrical system for fifth wheels or other towed campers to recharge the camper's battery system when the tow vehicle is running.

In Closing

Your RV will have power in its outlets in most conditions whether you are driving, plugged into shore power, or parked with the vehicle's motor not running.  The camper's battery powers the outlets in the camper.

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