Pull batteries or keep the shore power plugged in

Discussion in 'Winterizing' started by Mike sandor, Sep 25, 2018.

  1. Mike sandor

    Mike sandor Member GOLD Sponsor

    89
    Jul 28, 2017
    Eau Claire, Wisconsin
    2007 320 Sundancer
    Twin 496. Bravo 3
    2018 3500 Chevy, Loadmaster trailer
    Raymarine Axiom, Quantum 2
    496 Mercruiser/Bravo III drives
    apreciate advice on the following. I will store my 320 in a pole barn. I have the ability to plug in the shore power through out the winter. Are there any negatives regarding this? Towards the end of this season, i just replaced all 4 batteries, they are wet cell.
     
  2. JimG

    JimG Well-Known Member SILVER Sponsor

    Nov 4, 2008
    Southern WV
    2007 310 DA
    Kohler 5ECD
    Twin 350 Mags
    Raw Water Cooled
    V-Drives
    I make sure the water levels are all good, leave the batteries in the boat, and plug into shore power. Battery charger on all winter... no problem.
     
  3. The Bill Collector

    The Bill Collector Well-Known Member SILVER Sponsor

    Jun 2, 2008
    Tacoma, WA
    450 Sundancer
    3126 Cat's
    If the space is not heated, I would keep plugged in to run the heater(s) and maintain the batteries. (this is what I have done for the past 11 years - we are wet slipped year around)
     
  4. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    I'd personally put them away fully charged and disconnected, not plugged in. Less risk of cooked batteries and other unpleasant things that can happen when boats are left unattended for extended periods.
     
    importmonkey likes this.
  5. Mike sandor

    Mike sandor Member GOLD Sponsor

    89
    Jul 28, 2017
    Eau Claire, Wisconsin
    2007 320 Sundancer
    Twin 496. Bravo 3
    2018 3500 Chevy, Loadmaster trailer
    Raymarine Axiom, Quantum 2
    496 Mercruiser/Bravo III drives
    I was considering this option as well. Question, once the batteries are disconnected, can you plug in the shore power to raise and lower the hatch assuming you have the cables secure as to not ground out?
     
  6. JimG

    JimG Well-Known Member SILVER Sponsor

    Nov 4, 2008
    Southern WV
    2007 310 DA
    Kohler 5ECD
    Twin 350 Mags
    Raw Water Cooled
    V-Drives
    I don't think that will work... smart chargers must see a battery present to be able to output charge voltage. I'm not sure a charger would have enough current to raise the hatch anyway.
     
  7. Korkie

    Korkie Active Member SILVER Sponsor

    265
    Feb 2, 2016
    Leonardtown, MD Potomac River / Chesapeake Bay
    340 Sundancer 2006, Garmin 7612, xHD Radome
    Merc 496 Mags, Bravo III Drives
    Leave mine plugged in on lift. Have cabin heater in cabin and bilge heater in bilge set for 34 degrees. Been doing this since 2005 with no issues. First boat was a 2 banks of 2 batteries and the current is 1 bank of 2 and 1 bank of 3. Has worked out well for me.
     
  8. Craig

    Craig Active Member GOLD Sponsor

    254
    Feb 8, 2007
    Maryland
    2006 320 Sundancer
    twin 350 Horizon V drives
    Fully charged unplugged here.
     
    importmonkey likes this.
  9. MonacoMike

    MonacoMike Well-Known Member PLATINUM Sponsor

    Sep 15, 2009
    Indiana lakes and Lake Michigan
    2000 Cruisers 3870
    97 270 Sundancer
    85 Sea Ray Monaco 197
    8.2 Mercs,
    7.4 BII
    260hp Alpha 1
    Plus 1 here.

    MM
     
  10. MonacoMike

    MonacoMike Well-Known Member PLATINUM Sponsor

    Sep 15, 2009
    Indiana lakes and Lake Michigan
    2000 Cruisers 3870
    97 270 Sundancer
    85 Sea Ray Monaco 197
    8.2 Mercs,
    7.4 BII
    260hp Alpha 1
    No, the charger has no reserve power, just flatline power to charge. You can usually open the hatch with a jump box plugged into the cigarette lighter on both the boat and the jump box.

    MM
     
  11. bbwhitejr

    bbwhitejr Well-Known Member SILVER Sponsor

    Apr 14, 2013
    Lake Lanier GA
    2007 44DB
    Cummins QSC 8.3s
    Did it this way on previous 260DA.

    Bennett
     
  12. importmonkey

    importmonkey Opinionated Member

    947
    Jul 9, 2015
    Middle River, MD
    2007 44 Sundancer
    QSC 500s
    On the 260da, I physically disconnected the batteries and used another battery with pigtail to backfired into the 12v outlet to raise/lower the hatch.

    On the 44da, I just turn off the batteries from the switch.

    Neither have power while on the hard and seem fine.
     
  13. sbw1

    sbw1 Well-Known Member

    Oct 10, 2006
    West Michigan
    This is listed in my signature
    This is listed in my signature
    Put away fully charged. Turn off all switches. No shore power or charger. You will be fine in April, May or June. You can add Shore power in spring when waxing the boat, but even if you don't, the power to crank the engines will be there.
     
    Craig likes this.
  14. Golfman25

    Golfman25 Active Member

    191
    Sep 12, 2009
    IL
    281
    V8
    I used to pull the batteries. Too darn heavy. So I stopped. Now leave in boat, fully charged and disconnected. Come spring I connect and plug the shore power to run the charger and top them off. No real difference.
     
  15. Jaybeaux

    Jaybeaux Active Member SILVER Sponsor

    339
    Jan 3, 2016
    Upper Potomac River
    420 Sundancer 2004
    Naught On Call
    Cummins 6CTA-8.3's with V-Drives
    9KW Onan Genset
    Going into my 3rd winter. Plugged in to shore power.
     
  16. Riptide III

    Riptide III Active Member

    465
    Dec 8, 2007
    Dartmouth MA
    1997 Sea Ray 400DA
    Cat 3116 TA
    1994 Sea Ray Laguna CC Twin 135 Mercs
    :
    I shut the batteries off at the switches and walk away until spring. My boat yard doesn't let you leave things plugged in overnight
     
  17. Arickosmo

    Arickosmo Member

    264
    Apr 10, 2012
    Middle Coast
    2003 400DB
    Mercruiser 8.1L
    Floating, plugged in and checked on at least twice a month. Bilge is heated.
     
  18. 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
    If you leave them connected, then you should leave the charger on in case you have any stray load that will draw them down (even with the switches off) But should check them over the winter a few times to check water levels so they won't boil dry. The problem is that voltage drops when batteries get cold and the charger will probably be kicking in and cycling over winter, even with no actual power draw.

    My vote is for fully charged, disconnected, and left in the boat though. 25 years of doing that with no issues.
     
  19. JVM225

    JVM225 Well-Known Member

    Apr 8, 2008
    Farmingdale, NY
    2002 410 Sundancer, Monaco Edition.
    3126 Cats.
    Mine are always in the boat, connected, and charger turned on once or twice a month for a day or so.
    Nice to have 12 volt power when playing around inside the boat in the winter.
     
  20. scooper321

    scooper321 Active Member SILVER Sponsor

    567
    Jul 4, 2015
    Baltimore, MD
    "Lollygagger" 2003 Sundancer 320, Simrad NSS2 Evo9
    Twin 5.7L Horizon Mercruiser (350 MAG MPI) V-drives
    I do this, too. Although I am not a fan of plugging in the boat when it’s been a hard freeze for a while. Charging frozen batteries is not good for them.
     

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