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On-board battery charger installation options

Posted on 5/11/17 at 7:02 am
Posted by Wtodd
Tampa, FL
Member since Oct 2013
67726 posts
Posted on 5/11/17 at 7:02 am
A little longer than I wanted this to be.

OK this is primary for the guys with boats (I have a bass boat) 18' or less bc we have fewer places to install an on-board battery charger; I just got the Minn Kota MK220-PC. My problem is where to install it on the boat bc the area in the back of my boat where my 2 batteries and fuel tank are is rather 'confined'.

Let me TRY to explain the layout of the back of my boat behind the seats (Lowe Stinger ST175...2012 model). Here's a link to the 2017 model but it's virtually the same....
Lowe

I suck bigtime at posting pics that's why I didn't.

I have 4 different covered areas; live well, larger area that has the 2 batteries, fuel tank, etc but's it's enclosed with stainless steel on the inside so it's rather 'confined' and 2 smaller storage areas on either side of the bigger storage area.

Places where I've considered putting it are: attach it to underneath side of the lid that covers the back area where my batts are, either inside (somehow) or attached to the underneath side of one of the lids of the small storage areas that are on both sides of the batt storage area (these smaller storage areas are plastic lined and are used for either temporarily storing tackle or can be used as a small ice chest (they have drainage tubes). Bc they're are plastic lined I don't think just putting them inside is a smart option bc the charger gets pretty warm.

OK with all that said, what's the most inventive way or place have you installed an on-board charger or have seen one installed?

TIA
Posted by DeoreDX
Member since Oct 2010
4083 posts
Posted on 5/11/17 at 7:23 am to
Do you need the charger on the boat? If you don't have space why not just put some leads to the battery like with an anderson connector in a way you can access it easily to charge the batteries?

And FYI lead acid batteries make hydrogen as they charge and the hotter the battery is the more hydrogen they make. You do NOT want the battery to be in an enclosed space with no ventilation with a battery charger generating heat as it charges the battery. Could lead to a very dangerous situation.
Posted by purplengold98
Baton Rouge, LA
Member since Aug 2004
247 posts
Posted on 5/11/17 at 10:01 am to
Recently installed one in my boat. I was able to move the battery trays just a few inches tighter together and make enough room for mine on the inside wall of the battery/gas compartment. Without knowing your layout is this possible? Also, keep in mind with the heat the charger produces, don't mount it to carpet or metal, rather use a piece of plywood. I cut a piece to fit and mounted my charger and breaker then attached this board to the boat. I've got about 3-4" clear around my charger, so it's still tight, but works.

Like you, I also considered mounting to underside of the lid, but did not b/c this would mean you'd have either bolt heads or nuts on the topside which is unsightly and could make a tripping hazard depending on how much they stick up.

One other idea is that if you can get longer leads, you might be able to mount it under your driving console where your feet go, then fish the leads to the back where your batts are.

My boat is a 97, so even older than yours. They certainly weren't designing space for onboard chargers back then, so it takes a little creativity. You can figure it out, take your time and think it through.
Posted by TexasTiger
Katy TX
Member since Sep 2003
5328 posts
Posted on 5/11/17 at 10:21 am to
can you install the charger under the storage area of the driver or passenger seat. "based on the link you provided" it looks like you could use those areas.

Installing under the main lid would be fine as well. The head of the bolts would be on the outside of the lid and they would be flat enough to hardly be noticeable. Especially if you painted the heads of the bolts close to color of your carper. A little marine sealant on the bolt holes would also keep any water from getting in there.
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