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Wiring BEP battery management cluster

Old 05-04-2013, 07:19 AM
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Default Wiring BEP battery management cluster

After replacing corroded battery cables on my new to me 02 Hydra-Sports Vector, I decided to clean up the existing battery switches/jumpers with the BEP 717 cluster. After reading a ton of threads, etc. just really liked the installation simplicity and ease of use of the BEP unit. My existing setup is 4 batteries with 4 switches (three 1-2, both switches and a combiner). Prior owner had 2 start batteries and 2 dual purpose batteries wired into 2 banks, and both banks fed the house switch. I have not seen another setup like this and thought it would be better to get the benefits of the VSRs for charging and battery isolation. With the BEP cluster, I plan to run the two starting batteries, one for each engine, and group the two dual purpose batteries for the house.

Couple of questions...

I consulted with some folks to determine the appropriate battery cable size for my application (1/0) and was planning to use 1/0 cable for all battery jumpers and + cable from battery to switch. Assume since these cables will carry the start load, need to keep the same size cable, correct?

I have wired and plumbed two independent bilge pumps and float switches. Do you prefer wiring the fused hot lead directly to the battery or to the hot side of the battery switch? If I left the boat overnight in the water and the pumps needed to run, obviously I would want them to run as long as possible.

The boat has a 2 bank charger installed. The BEP cluster specs say to wire the charger to one of the switch terminals. Since I have a 2-bank charger, would I be better to wire the charging leads directly to 2 batteries? Hope I don't really need to use the charger but nice to have on board just in case.

Appreciate the help! After I get the batteries squared away, on to the rat's nest in the console! Thanks, FB
Old 05-05-2013, 05:56 PM
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I wired it to the BEP when I had a single bank charger, when I upgraded to a 20 amp smart charger I went right to the batteries so the charger could determine where to send the amps.
Old 05-06-2013, 04:51 PM
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Thanks Steelhead!
Old 05-06-2013, 10:42 PM
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Originally Posted by FishBut View Post

I consulted with some folks to determine the appropriate battery cable size for my application (1/0) and was planning to use 1/0 cable for all battery jumpers and + cable from battery to switch. Assume since these cables will carry the start load, need to keep the same size cable, correct?
I'm no expert, so someone can correct me if I'm wrong, but everything I've read says once you've properly sized your battery cable, the negative jumpers b/t the starter and house banks should all be as big or bigger, never smaller.

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