Installing Redarc In-Vehicle BCDC Battery Charger in 2024 Toyota Highlander Hybrid XLE

Question:

2024 Toyota Highlander Hybrid XLE. Does the Redarc DC-DC charger connect to the small auxiliary battery in the Highlander then go to Trailer battery directly. I’m used to an alternator type vehicle set up, but hybrid doesn’t have an alternator. The 12 v battery in the hybrid Highlander is pretty small. Would be up to this system? Any wiring diagrams for hybrids?

asked by: Mark S

Expert Reply:

The wiring for the # 331-BCDC1225D would be the same as the diagram below, you're just coming off of that 12V battery in the back instead of your typical battery in the engine compartment. The thing you need to figure out, and that I'm not sure about, is how exactly that battery is recharged. I would ask the Toyota dealer if it will work to connect the battery charger to it. As long as it is getting enough of a charge and you aren't pulling too much power it will be fine. Otherwise, you're going to kill the battery eventually which will result in an error.

expert reply by: Robin H