Will Trailer Lithium Battery Pull More Power Through 12V Pin on Truck 7-Way

Updated 05/23/2023 | Published 05/22/2023

Products Featured in This Question

Redarc In-Vehicle BCDC Battery Charger - Dual Input - DC to DC - 12V/24V - 25 Amp

(88)

$484.59

Trailer Installation Kit for Redarc BCDC - 25 Amp

$583.97

Question:

I am wondering if upgrading to a lithium compatible battery charger in my trailer how this will effect my trailer connector and truck alternator. I was not able to find anything in the manual about the connector. I know it seems to trickle charge our AGMs when towing but if I switch to lithium will there be any impact? Where is this controller for the trailer connector anyway? Is it part of the WF8955? Thanks!

asked by: Yona B

Expert Reply:

When you charge your battery bank using the 12V power from your tow vehicle 7-Way it's going to be a trickle charge whether you have standard or Lithium batteries.

If you want your tow vehicle to actually charge your Lithium battery then you need a whole different setup like the Redarc In-Vehicle BCDC Battery Charger # 331-BCDC1225D designed for battery banks rated for 75 amp-hours - 200 amp-hours. This system uses a completely different wiring connector for 12V power so you can be confident they can handle the higher rate of power coming through the connectors.

We actually have a whole kit as part # e79ZR which comes with all of the wiring and connectors you need to complete this installation.

expert reply by: Jon G