How to Wire 12V Battery in Enclosed Trailer to Power Trailer Lights Independent of 7-Way Connection

Published 11/18/2022

Products Featured in This Question

Progressive Dynamics 9200 Inteli-Power Converter - 12V - 45A

(150)

$250.29

Go Power Heavy-Duty Modified Sine Wave Inverter - 400 Watts - 12V

(23)

$47.99

Single Rocker Switch - 12V - On/Off - SPST - Black Plate with Red Illuminated Switch

(23)

$9.39

RV Cable Hatch Installation Kit

(9)

$8.39

JR Products Electric Cable Hatch for RVs - 5-1/8" Diameter - White

(108)

$10.84

Progressive Dynamics Converter Status Remote Pendant

(129)

$19.13

Question:

I would like to add a large auxiliary battery to my cargo trailer to power the lights and wire in a charger for the auxiliary battery from shore power. I would also like to add a converter that would allow create a AC standard outlet. Ive read through what I can find on your site using the isolation solenoid but wondered if you would be able to line me out with the items needed. Thanks

asked by: Jeff K

Expert Reply:

To charge your battery bank from shore power you need a converter like the 45 Amp Progressive Dynamics Inteli-Power RV Converter and Smart Battery Charger # PD9245C and then you can use the Go Power Heavy-Duty Modified Sine Wave Inverter # 34280174 so you can have 2 standard-type outlets. To power the interior lights on your trailer you'll just pull that power directly from the battery bank and you'll control the power using a rocker switch like part # 37212525.

That will give you the basics for what you need but I also recommend picking up the Converter Status Remote Pendant # PD92201 so you can monitor the charge of your battery bank, and then you can use an Electrical Cable Hatch # 372541-2-A with the installation kit # 3724195 to give you an easy way to run an extension cord out from the converter to a shore power outlet.

Attached are some videos for you to check out. If you had anything else you wanted to add please let me know!