Thinking about replacing my stock Surepower 1314A separator with a Blue Sea ACR. As others have pointed out on previous threads, the 1314A will go open circuit if the aux batt voltage drops below 12.7V or thereabouts. I have lots of solar (320W), but in the morning after running the frig and maybe 2 fans at night I'm down to 12.5V or lower. When I drive away in my truck it may take awhile for the separator to connect and charge the camper batteries. I haven't been impressed with how the truck is charging the batteries when it's running. I know I'm limited by the standard 10 ga wire that FWC uses, but I think the separator is taking awhile to close.
I read this chart from Blue Sea:
I don't feel I need the 7622, as the only additional benefit it offers me is the ability to use the camper batteries to start a dead truck battery - but, this would entail replacing the ACR to truck and camper batteries w/2 ga wire. I run all my electrical through a wiring harness, and carry jumpers that can reach from the camper batteries to the engine compartment.
The 7611 has a lower threshold for the aux battery cutoff, 12.25V when the truck is running, and I feel that would cover my needs, as my camper battery voltage is rarely lower than 12.3 in the AM. What I'm wondering is, will my solar charge my TRUCK battery, if it was low, after my camper batteries are fully charged? When I read that chart I referenced above, it seems that all of the ACRs have the preset ACR settings which, if I'm reading it right, means that above 13.6V solar could feasibly charge a low truck battery. BUT, what if my camper batteries float at 13.5V? Will the solar just cut back on delivering amps like it normally does, and not give any juice to the truck batt, since technically neither battery is at or above 13.6V? If there's solar power available (with my 320W I almost always have some power, even on cloudy days) will that extra power go to the truck battery if needed? I'm thinking yes, but not sure.
Edited by radarcontact, 22 August 2019 - 03:33 AM.