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Battery charger

Old 08-05-2020, 09:07 AM
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Default Battery charger

I have a 2019 Key West 230BR with a 2019 Yamaha VF250. There are two crank batteries installed behind a Blue Sea M-Series Selector Battery Switch Part #6007. I need a way to recharge these batteries at home and for now and would just like to go the portable route. I would love a recommendation on what to get as well as how to hook up the charger to the batteries. I assume I leave the switch set to off, just not sure how to hook up the battery terminals to the charger. Thank you in advance.
Old 08-05-2020, 09:20 AM
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For a portable charger the Schumacher line is a great value, and has built in desulphatoin function which is a huge benefit.

Amazon Amazon

Just hook it up to each battery. If you have an ACR it may kick in and charge both. Personally like to charge without the ACR connecting to give each battery individualized treatment, but not a big deal if the boat gets used frequently.
Old 08-05-2020, 09:54 AM
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Since they are both crank batteries for a single outboard, I'm assuming they are wired together. If so, any battery charger is going to see it as one battery. So simply connect the charger up to the terminals of one of the batteries and it will charge both.

Or....(this is what I would do), add a Blue Seas ACR with circuit breakers between each battery and the ACR terminals. Connect the charger to one battery and the ACR will connect them and charge both. If you like to charge them separately, simply trip the circuit breakers and then charge them individually.
Old 08-05-2020, 12:46 PM
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I would have thought they were separate since there is a 1+2 switch installed. I don't see an ACR installed. I do see that the grounds on the two batteries are connected to each other. I am hoping to get a charger that I could just keep plugged up until the next trip with could be 6 to 8 weeks sometimes. Thanks
Old 08-05-2020, 01:10 PM
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It will see the batteries as one bank of two Only if you leave the selector switch in the both position. While this might serve to charge both batteries, and keep them topped off, it also risks both batteries if one develops a problem.

I would suggest leaving the switch in the OFF position and connecting the charger to the common ground and the positive terminal terminal on one battery. Assuming you have access to the boat, switch the positive lead from the charger to the other battery to charge it.

Old 08-05-2020, 01:24 PM
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So put the ground, from the charger, on the ground post of battery Aand the positive, from from the charger, to the positive post on battery A. Charge up battery A and then move the positive from the battery A post and move to battery B post. Not as hands off as I hoped. Could I buy a two bank smart charger to do what I want to do? Thanks
Old 08-05-2020, 01:36 PM
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Yes, they do make 2 bank chargers, Actuality In would get a standard marine intelligent 2 bank shore power charger with isolated outputs to cover all the bases. I would get a marine charger that automatically identifies the battery type such as flooded acid, AGM and Gel. Also get a marine charger with dynamic output capability to be able to dynamically assign all the charging current to both banks as required. I assume no lithium batteries in your present or future plans.

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Old 08-05-2020, 01:41 PM
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Originally Posted by Mr Peabody View Post
So put the ground, from the charger, on the ground post of battery Aand the positive, from from the charger, to the positive post on battery A. Charge up battery A and then move the positive from the battery A post and move to battery B post. Not as hands off as I hoped. Could I buy a two bank smart charger to do what I want to do? Thanks
Yes - This is what I do - I use a 2 bank charger on Cranking & Electronics batteries & a 3 bank charger on 36 volt trolling motor..

But in original post you stated you wanted a portable option -I don't know if I seen a 2 bank portable charger - but they could be out there.

Old 08-05-2020, 01:50 PM
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Thanks everyone. They have a Nocp genius GENmini2 On Board 2 bank 8A charger down at Battery source. Yes I did say portable but it doesnt seem like Im going to find that. Does this charger seem like a viable charger for me. I dont have a marine store near me and dont really have time to get something shipped in. Thanks
Old 08-05-2020, 02:13 PM
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Yes, that will work just fine. Matter of fact, West Marine used to carry that exact item and called it "marine", lol.
Old 08-05-2020, 02:25 PM
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You can get a pro mariner 2 bank for 115 bucks.
Old 08-05-2020, 05:21 PM
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Got it installed. I know it should be as far away from the batteries as possible so I just laid the charger on the floor of the boat for now while its charging. I assume when its not plugged in I could just through it In the same bay where the batteries are? Definitely will try and mount inside the console down the road and maybe add a plug for it on the side of the outside of the console.
Old 08-05-2020, 07:35 PM
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Just for future reference, Minnkota makes a two bank portable charger.
Old 08-06-2020, 06:19 AM
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Originally Posted by Mr Peabody View Post
Got it installed. I know it should be as far away from the batteries as possible so I just laid the charger on the floor of the boat for now while its charging. I assume when its not plugged in I could just through it In the same bay where the batteries are? Definitely will try and mount inside the console down the road and maybe add a plug for it on the side of the outside of the console.
I would not leave anything flopping around in the battery compartment.
Old 08-06-2020, 06:58 PM
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Ny charger is about1.5 feet away from the batteries. No need to hide the charger from the batteries that i can recall.

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