21ec charging wires

[Pilotnavigator]

I was looking over the wiring on my boat. With the purpose of getting to understand better where all the battery wires go. I noticed there is a red jumper wire from the house to the starter battery. It appears a wire from the pro mariner charger is marked battery 2 goes to the house battery. There is a fuse inline just before the battery. Then there is a second wire with a fuse going to the starter battery. Both are around 14 gauge. Does this sound right? I thought the ARC is supposed to clamp the batteries during charging. Also wanted to see if the alternator charge line went to the house or starter.
Any info on how other new boots are wired. Mine is a 2015.
Thanks

 

[SGIDAVE]

I was looking over the wiring on my boat. With the purpose of getting to understand better where all the battery wires go. I noticed there is a red jumper wire from the house to the starter battery. It appears a wire from the pro mariner charger is marked battery 2 goes to the house battery. There is a fuse inline just before the battery. Then there is a second wire with a fuse going to the starter battery. Both are around 14 gauge. Does this sound right? I thought the ARC is supposed to clamp the batteries during charging. Also wanted to see if the alternator charge line went to the house or starter.
Any info on how other new boots are wired. Mine is a 2015.
Thanks

Hello John,

Look at your Promariner manual to see how it is supposed to be wired. Mine is the 12-20 model meaning it charges at 12 VDC at max 20A. It is a THREE bank charger. It specifies 10 AWG wires to carry the charge current and fusing is required within a few inches of the battery. I've had a failure of the standard "inline" fuse used in this situation (pic in my album) and have switched mine to a newer Blue Sea devise like this:

More details about it are here

Anyway a devise like this reduces the "clutter" at the battery terminals.

If I understand you, there is an approx 14 ga wire running between the pos terminals of two of your batteries? Or is the "second wire" another lead from the Promariner. Multi-bank chargers like ours act like SINGLE bank chargers when the ACRs get involved and do their normal 'combining'. The ACRs are a GOOD thing when your out running the main engine which provides ONE source of charging which must, somehow, get distributed to ALL the batteries. Once safely tied up ashore and connected to 120 VAC the multibank charger is forced to act like a SINGLE bank charger as the ACRs combine all the batteries into a single bank. BlueSea makes a charger which interacts with the ACRs to disable them (i.e., force them to stay 'OPEN') whilst charging is occurring such that you can (RE)gain the benefits of a multibank, multistage charger.

dave

 

[Pilotnavigator]

Thanks Dave, the second wire runs from the house battery to the starter. They could be 10 gauge. I can't see what purpose it could have. I will call the factory and see it they do it.