How to Recharge an RV Heat Pump

How to Recharge an RV Heat Pump
When your RV's heat pump seems to be on the fritz, you'll need to charge the batteries that power it. An RV heat pump makes up a part of the vehicle's heater and cooling unit. These devices draw their power from the deep cycle batteries in the RV. These are not the batteries from which the engine draws, however; the RV uses these separate batteries when not connected to electric hookups. To recharge your heat pump, you'll need to recharge the deep cycle batteries.


Difficulty: Moderately Easy

Things You’ll Need:
  • Deep cycle RV battery(s)
  • Battery charger
  • Jumper cables
Step 1
Turn off all electric connection to the RV, and disconnect the wires from the battery terminals. If your vehicle has a ground wire (typically not the case, as the black/negative cable acts as the ground, but some older models have ground wires) disconnect it as well.
Step 2
Plug in the battery charger (use an extension cord if needed), and bring the charger to the RV deep cycle battery. Attach the black/negative cable to the deep cycle battery black terminal. Make a point to connect the black cable first: Connecting the red cable first can short out the electric system.
Step 3
Attach the red cable to the deep cycle RV battery's red terminal. Attach the other end of the red cable to the battery charger's red terminal. Check to ensure that you have firmly attached all cables.
Step 4
Press the power button to turn on the battery charger. Look at the charge gauge on the battery charger to determine the level of the deep cycle battery. Look at the charger's gauge to determine how long the battery needs to charge. Leave the charger on for the recommended time.
Step 5
Turn the charger off after the recommended charge time, and after you check the gauge to ensure that the deep cycle battery has received a full charge. Connect the red and black RV wiring back onto the RV deep cycle battery after you remove the cables from the battery. Connect the electricity and turn on the heater to ensure that the heat pump is working properly.

Article Written By Eric Cedric

A former Alaskan of 20 years, Eric Cedric now resides in California. He's published in "Outside" and "Backpacker" and has written a book on life in small-town Alaska, "North by Southeast." Cedric was a professional mountain guide and backcountry expedition leader for 18 years. He worked in Russia, Iceland, Greece, Turkey and Belize. Cedric attended Syracuse University and is a private pilot.

Keep Me Informed

Weekly newsletters, announcements and offers from to your inbox.

Sign me up!

We HATE spam and promise to keep your email addresses safe and secure.