Battery Storage/Tender

Discussion in 'General Maintenance/Repair Questions' started by ja308601, Oct 18, 2019.

  1. ja308601

    ja308601 Member

    Jan 1, 2019
    Toledo, Ohio
    2007 290 DA
    Kohler 5kw, Raymarine Hybrid Touch
    5.0L Mercruisers w/Bravo III Drives
    The boat is coming out of the water tomorrow and I am bringing the batteries home with me. What chargers/tenders are folks using/recommending?

  2. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    If your batteries are in good shape and not connected to anything you really shouldn't need a "tender" for the winter. Make sure they are fully charged when you take them off the boat and maybe hook them up to a standard charger in the spring before you put 'em back in.

    My experience has been that tenders are more useful when you leave the batteries in something (like a car) for long term storage where some systems are still drawing small amounts of juice.
  3. Creekwood

    Creekwood Well-Known Member GOLD Sponsor

    Apr 26, 2009
    Oakville and Georgian Bay, Ontario
    '97 330 Sundancer, Raymarine C80 suite with radar, Mercury 310 Hypalon w/8hp Yammie 2stk
    2X 454 carbs w/ vDrives
    I leave mine on board, disconnected and not on a tender. In the spring when I put the converter back on, it never has to charge very long so I don't think they lose much charge over winter.
  4. markrsimon

    markrsimon Member

    Sep 1, 2018
    Cleveland, OH
    92 Sea Ray 400 Express
    454 Mercruiser
    I ended up with a spare ProNautic charger (20amp) that I use for winter layup. I take the batteries home, and wire them up (see excerpt below). I'm only on year 2 for these batteries, so it's too early to tell if they benefits are truly there. At the very least, they are more than ready for spring. If I didn't have the spare ProNautic, I would throw them on the regular automotive smart-charger half way through the winter, and again before launching in the spring. Have to factor in how many batteries you have, and how much you paid for them.

    Stage 5 - Storage Recondition: During this stage the Pro Series will enter into its once a month storage recondition mode. The green Storage Recondition LED will have a fade in and out pulse indicating that while your batteries / boat are in storage, the Pro Series is reconditioning all batteries for up to 3 hours once a month to extend battery life and provide maximum reserve power performance on the water
  5. JVM225

    JVM225 Well-Known Member GOLD Sponsor

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    I’m a big fan of the “Battery Tender” brand.
    I’ve got a couple in my garage that I use for my Corvette and GTO, been using them for years and they’re great.
  6. JimT

    JimT Well-Known Member GOLD Sponsor

    Jul 7, 2009
    Charlotte, NC- LKN
    2010 330 Sundancer
    T-350mags w/BIIIs & Axius, 5.0 kw Kohler
    I have used the Battery Tender brand with good success. I am currently using a CTEK on my 991.1. I remove my Waverunner battery during the winter and put on the trickle charge periodically. May not be needed but it doesn’t hurt.

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