Marine Charger Wiring

[sailsmanship]

Have a new Promariner Protech 1225i 3 bank charger I am trying to install. It is replacing a Protech 4 that burned out after a year. The one before that made it at least 15 years. Question is that after reading the instructions, hooking it up seems pretty simple. I would just hook it up like the last two. Three red positives to three battery positive leads,one black negative to wiring harness, and a chassis ground. In the instructions it says the single black would go to a ground buss, that would in turn go to three battery negative leads. I can only trace the black wire only so far and then it disappears into a wire loom.The main confusion is that the only connections that are on the negative battery sides are the main grounds going to the motors. Should I add three seperate negative wires going from the negative terminal of the charger to the batteries?

 

[Barnacle_Bill]

Re: Marine Charger Wiring

You must have had an old charger using a common ground. The newer chargers require a neg and a pos lead to each battery.

 

[seabob4]

Re: Marine Charger Wiring

So you are saying that the PM charger only has positive leads for each batt, and one common ground? How old is this charger? We use PM chargers at Proline, and all, from the little 2-bank up to the ProTournament 4-bank have separate ground leads for each batt...

 

[sailsmanship]

Re: Marine Charger Wiring

Yes this is brand new, just bought it yesterday. That is what I am questioning. The instructions do note that there is one common ground that should go to a buss that then should go to each of the three negs of the battery. That is why I think I have to add that but wasn't sure.

 

[ProMarJim]

Re: Marine Charger Wiring

Yes this is brand new, just bought it yesterday. That is what I am questioning. The instructions do note that there is one common ground that should go to a buss that then should go to each of the three negs of the battery. That is why I think I have to add that but wasn't sure.

Sailsmanship,

If you have not received answers to your questions call me.

You can call the phone number on the label and ask for me Jim Mitchell.

Jim

 

[Silvertip]

Re: Marine Charger Wiring

Any of those three batteries in a 24 or 36 volt series environment that is not the charger to have if the outputs are not 100% isolated with separate grounds.