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Mixing Deep Cycle and Starting Batteries
- Thread starter IZwack
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we do it all the time on boats, I can't tell if there is a special way to hook them up or if they just charge at different rates. It's very common on deep cycle batteries to run them on a slow trickle charger as the short bursts from the alternator doesn't usually run long enough to give them a full charge.
Good article here.
http://www.yachtsurvey.com/boat_battery_basics.htm
Good article here.
http://www.yachtsurvey.com/boat_battery_basics.htm
dogfriend
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Motorhomes typically have one chassis battery and two or more deep cycles, but they do have an isolator and a charge controller for the deep cycles. My GF's motorhome has a momentary switch on the dash so that you can use the deep cycles to boost the chassis battery if it gets run down.
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I've been told most 12v deep cycle batteries are not a true deep cycle battery - the 6volt golf cart batteries are.
On my camper, the 12v "marine" aka "deep cycle", are on a battery separator now from the truck's dual 12v batteries.
On my camper, the 12v "marine" aka "deep cycle", are on a battery separator now from the truck's dual 12v batteries.
IZwack
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Thanks for the input guys.
Right now I think the batteries (3 of em) are connected in parallel. One battery is under the hood and two of them are on the passenger side and towards the back of the van.
A plan is to use a cranking battery under the hood, and then two deep cycles on the side. Then put a relay (like a glow-plug relay- GPR) to isolate the cranking battery from the deep cycles. Basically, turn they key forward and the relay will click ON - connecting the cranking battery to the starting batteries. Turn the key backwards and the relay stays Off which means the vehicle is relying only on the deep cycles (the two on the side).
But what (voltage) on an average vehicle is Off when the key is turned backwards and On when the key is turned forwards (like to start the engine)?
Right now I think the batteries (3 of em) are connected in parallel. One battery is under the hood and two of them are on the passenger side and towards the back of the van.
A plan is to use a cranking battery under the hood, and then two deep cycles on the side. Then put a relay (like a glow-plug relay- GPR) to isolate the cranking battery from the deep cycles. Basically, turn they key forward and the relay will click ON - connecting the cranking battery to the starting batteries. Turn the key backwards and the relay stays Off which means the vehicle is relying only on the deep cycles (the two on the side).
But what (voltage) on an average vehicle is Off when the key is turned backwards and On when the key is turned forwards (like to start the engine)?
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