Shore power and battery charger

Discussion in 'Classic Sea Rays' started by DavePant, Aug 13, 2019.

  1. DavePant

    DavePant New Member

    12
    Aug 5, 2019
    1989 270 Amberjack
    5.7L Twin
    Please excuse the ignorance but is it common when plugged in to shore power to leave your onboard battery charger running? This is my first "bigger" boat and I will probably have all kinds of newb questions to ask. I have a 1989 Amberjack 270.
    Thanks,
    Dave
     
  2. SCORPIO

    SCORPIO Well-Known Member SILVER Sponsor

    Apr 7, 2008
    Delaware
    1989 300 DA
    Twin 5.7 Merc Alpha I
    I leave mine in all the time, keeps batteries tipped off in case I start pumping due to a leak.
     
  3. DavePant

    DavePant New Member

    12
    Aug 5, 2019
    1989 270 Amberjack
    5.7L Twin
    Ok thanks, just did not want to leave it charging then come out to go to work in the morning and have a big hole in the side of my boat and its on fire from overcharging lol!
     
  4. MonacoMike

    MonacoMike Well-Known Member PLATINUM Sponsor

    Sep 15, 2009
    Indiana lakes and Lake Michigan
    2000 Cruisers 3870
    8.2 Mercs
    85 Sea Ray Monaco 197
    260hp Alpha 1
    Being an older vessel you do want to be certain you have a smart charger that will not overcharge your batteries and ruin them. Otherwise, with a smart charger most leave them on all the time.

    MM
     
    DavePant likes this.
  5. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    For the money a new charger isn't a terribly expensive "piece of mind" upgrade. I replaced my factory original Promariner this year after one of its banks went bad. It toasted a 2 year old battery in the process. In retrospect I could have saved a $100 battery by investing in a $400 charger a bit sooner.

    If you're like the rest of us you probably have a spreadsheet of future upgrades/projects. Might as well toss the charger on there for kicks...
     
  6. 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
    Promariner Pronautic is a great smart charger and a direct replacement for the older Promarine units. Helps your batteries last longer. IMO pays for itself over one set of batteries
     
  7. Loyd Dinneen

    Loyd Dinneen Active Member

    327
    Jul 29, 2017
    Las Vegas
    1977 Sea ray 240 SDA cruiser w/ twin 470 mercs.
    Twin 470 Mercruisers
    If you had a 2 year old marine battery it was at its lifespan.
     
  8. Little Ducky

    Little Ducky Well-Known Member

    Jun 5, 2017
    Dickson, TN / Chattanooga, TN
    1998 290 Sundancer
    Twin EFI 5.0L w/Alphas
    Kohler 4kW
    Isn't that the truth.
     
  9. Stee6043

    Stee6043 Well-Known Member

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    Really? I don't know what brand batteries you've been buying....but they are not the right ones! Properly maintained marine batteries should be good for 4-5+ years. If they pop after two years because you're not watering them, that isn't "lifespan", that's improper maintenance :)
     
    Creekwood likes this.
  10. RollerCoastr

    RollerCoastr Well-Known Member

    Nov 15, 2007
    Cedar Point, OH / Miami, FL / MacRay Harbor, MI
    1997 400DA
    340HP 7.4 Mercruiser Bluewaters
    Garmin 741, 742, 8212, 24HD, Intellian I2
    1999 280BR
    Twin 250HP Merc 350 Alpha Ones
    I'm still using factory-installed charger. I'm scared to continue to type this, but it's working great! lol

    This spring I pulled the 5-year old Interstate batteries from the port bank and installed them in the 280. Based on the way they hold a charge and how little water they consume, I expect to get 2 more years out of them.
     
  11. Little Ducky

    Little Ducky Well-Known Member

    Jun 5, 2017
    Dickson, TN / Chattanooga, TN
    1998 290 Sundancer
    Twin EFI 5.0L w/Alphas
    Kohler 4kW
    That's pretty good.

    For me with cars and boats....... once they hit the 5 years mark I'm just waiting for the day to get the dreaded ....Click, Click Click of the starter.
     
  12. Island Time Buffalo

    Island Time Buffalo Member

    192
    Aug 19, 2014
    Grand Island, NY
    380 Sundancer 1999.
    7.4 Horizons

    Agreed. 4+ with a smart charger for a house. 5+ for a starting-only battery. My genny battery is about 10+ (obviously a much different load).
     
  13. RollerCoastr

    RollerCoastr Well-Known Member

    Nov 15, 2007
    Cedar Point, OH / Miami, FL / MacRay Harbor, MI
    1997 400DA
    340HP 7.4 Mercruiser Bluewaters
    Garmin 741, 742, 8212, 24HD, Intellian I2
    1999 280BR
    Twin 250HP Merc 350 Alpha Ones
    Yep, me too. I start to trust them less after the 5 year mark, so that's why I "demote" them to the project boat at that age. That boat has 3 batteries to start 2 engines and run the radio, so I've found it to be a good use of older batteries.
     
    Little Ducky likes this.

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