Results 1 to 10 of 10

Thread: Low profile marine battery

  1. #1
    Join Date
    Jul 2010
    Location
    northeast Ohio
    Posts
    2,600

    Default Low profile marine battery

    I'm searching for a short height or low profile marine starting battery...like 7 inch tall maximum including the terminals...
    Side terminals would be OK...
    My Suzuki outboard manual says the sealed, maintenance free, or gel cells may not be compatible with the charging system...
    The space where I want to put the battery is a bit height challenged...
    Any ideas on if there even is such a thing like a low profile wet cell?
    Thanks
    Tim

  2. #2
    Join Date
    Mar 2007
    Location
    East Quogue,NY
    Posts
    23,118

    Default Re: Low profile marine battery

    Hey, Timo

    Optima's 34M is a marine battery. It is 6.5 inches wide. It's an AGM, so you can mount it sideways.

    optima_bt_34m_right-copy_60171d49-d76b-4325-92b6-adae1bf2808f.jpg

    Kevin

    Edit: I would call Suzuki about AGM batteries. The manual may not be totally clear on this point.

    Kevin
    Last edited by Breakaway; 06-07-2021 at 05:01 PM.
    There are two kinds of boaters: those who have run aground, and those who lie about it.

  3. #3
    Join Date
    Apr 2005
    Location
    Hills of Vermont, USA
    Posts
    41,036

    Default Re: Low profile marine battery

    Group 57 is 8 1/16 x 7 3/16 x 6 15/16 (LxWxH)
    Group 58 is 10 1/16 x 7 3/16 x 6 15/16

    https://www.batteryequivalents.com/b...ize-chart.html
    "If it ain't broke, you're not trying." - Red Green

  4. #4
    Join Date
    Jul 2010
    Location
    northeast Ohio
    Posts
    2,600

    Default Re: Low profile marine battery

    Thanks for the help guys.
    I found a page on Interstate battery's site that gives me a few in the height I'm looking for, the power specs are in range, and I have a location right in my town.
    I'm going to check them out in a couple days.
    I'll report back how I make out.

  5. #5
    Join Date
    Jul 2010
    Location
    northeast Ohio
    Posts
    2,600

    Default Re: Low profile marine battery

    I picked up my new Interstate battery today.
    Got a group 40 size which is just under 7 inches tall.
    Fits under the floorboard with no problem.
    Specs within range called for on the motor.
    Happy with the result, having the battery forward, and not in the rear... the motor is heavy enough already as it is...

    IMGP1120.jpg

    IMGP1119.jpg

    IMGP1118.jpg

    Of course I'll get the thing secured better than it looks here.

  6. #6
    Join Date
    Apr 2005
    Location
    Hills of Vermont, USA
    Posts
    41,036

    Default Re: Low profile marine battery

    Excellent! I understand you'll secure it, but I'd strongly recommend a battery box. You might not be able to use the cover because of the height, but at least you'd have the bottom to catch acid should it be needed.
    "If it ain't broke, you're not trying." - Red Green

  7. #7
    Join Date
    Jul 2010
    Location
    northeast Ohio
    Posts
    2,600

    Default Re: Low profile marine battery

    Understood.
    Thanks.

  8. #8
    Join Date
    Apr 2005
    Location
    Hills of Vermont, USA
    Posts
    41,036

    Default Re: Low profile marine battery

    YW - the boat looks fantastic by the way!
    "If it ain't broke, you're not trying." - Red Green

  9. #9
    Join Date
    Mar 2007
    Location
    East Quogue,NY
    Posts
    23,118

    Default Re: Low profile marine battery

    Looks good.

    Be sure to size the cable correctly ( you may need to go up a size) with a forward-mounted battery to account for voltage drop, which can affect both charging and starting. Acceptable voltage drop is 3-percent, according to ABYC. Measure voltage at the battery terminals while cranking engine. Measure voltage at starter motor while cranking. The difference should be less than .5 volts.

    For a hold down, I like a tray, in combination with threaded hold downs like these. These hold downs hook into strap eyes screwed into the boat on either side of the battery tray. Then, a piece of bar stock aluminum, cut to length and drilled for the rods goes across the top. Replace the wingnuts with locknuts. Battery no go anywhere, no matter how rough it gets.

    battery bolts.jpg

    Looking good!

    Kevin
    There are two kinds of boaters: those who have run aground, and those who lie about it.

  10. #10
    Join Date
    Jul 2010
    Location
    northeast Ohio
    Posts
    2,600

    Default Re: Low profile marine battery

    Yes, I have 8 gauge on the motor harness now and will need about a 12 foot extension to those wires.
    I will go at least 6 gauge, maybe 4 on the extension.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •