How to Use a Tow Vehicle to Charge an RV Battery

Updated 06/01/2018 | Published 05/30/2018

Products Featured in This Question

Starter Solenoid - SPST - 12 Volt - 100 Amp - Continuous Duty - Grounded

(14)

$35.41

Redarc In-Vehicle BCDC Battery Charger - Dual Input - DC to DC - 12V/24V - 40 Amp

(88)

$620.00

Question:

how do we wire in your part #PK5231201 on the tow unit to charge the rv battery

asked by: Jimbo

Expert Reply:

I have attached a photo that shows how the Battery Isolation Solenoid part # PK5231201 will need to be wired in order to help "maintain" a charge on an RV's battery. This isolator will prevent the trailer battery from draining the tow vehicle's battery while the ignition is turned off.

In order to actually charge the battery on your RV from the tow vehicle, you are going to want to use a DC to DC battery charger like # 331-BCDC1240D which uses the vehicle's alternator to charge the RV's battery. I have attached a review video of this charger for you as well.

expert reply by: Conner L