Thread: Battery management- third battery

Please excuse the double post- I posed this question in the caravans & campers section but it has not had much traffic and zero responses.

I have an auxiliary battery in the Defender which is managed by a fairly old Pirhana dual-battery system. I'm now adding a camper with it's own battery running a fridge, HWS, diesel heater and lights. I plan on continuing to run the Engel in the vehicle as well as the camper's own fridge. I'm wondering how to keep the camper battery charged whilst travelling- I can hook up solar when parked.
I have an Anderson plug at the rear of the vehicle which is connected to the auxiliary battery and there is an Anderson plug on the camper connected to the onboard battery. Would it be sufficient to connect the camper into the existing auxiliary system, or do I need some additional management gadget? Aux and camper batteries are both AGM.

Originally Posted by POD

I have an Anderson plug at the rear of the vehicle which is connected to the auxiliary battery and there is an Anderson plug on the camper connected to the onboard battery. Would it be sufficient to connect the camper into the existing auxiliary system, or do I need some additional management gadget? Aux and camper batteries are both AGM.

That will be fin and as there are a number of different isolators of that brand, so I can not comment on it.

But if you connect you solar panel via the solar regulator, you can charge the house battery and if you Defender is still connected, you will at least charge the auxiliary battery, and depending on the isolator, you may charge the cranking battery as well.