shore power/battery switch question

Discussion in 'Electrical Stuff' started by matt4704, Jun 27, 2010.

  1. matt4704

    matt4704 New Member

    103
    Jun 18, 2010
    St. Petersburg, FL
    Sundancer 270
    7.4 Mercruiser w/Bravo III Drive
    When I am connected to shore power Where does my battery switch need to be. Do I leave off, all, 1, or 2....Also when connected to shore power is it supposed to be charging my batteries? :huh:
     
  2. Fancy Nancy

    Fancy Nancy New Member

    60
    Jan 2, 2010
    Lake Norris Tn.
    2007 Sundancer 310, twin 5.0 MPI, Bravo 3's, RayMarine C80
    5.0LMPI's w/Bravo III
    I believe you want the battery switch to be on "both" and the "convertor" switch on the control panel in the on position. Then both chargers will be lit if you check them visually.
     
  3. BahamasBlair

    BahamasBlair New Member

    93
    Mar 15, 2009
    Freeport, Bahamas
    340 Sundancer 2005
    8.1L Horizons
    Hi,
    I don't know how the 270 is wired but on the 340, the charger is wired directly to the batteries (4), and whenever your shore power is on, with the A/C converter breaker on, the batteries charge. Hope this helps.
     
  4. rcmafgny

    rcmafgny Active Member

    Oct 10, 2009
    Long Island, NY
    2008 33 Sundancer; Kohler Gen set; Simrad electronics
    Twin 8.1 Horizons w/ V Drives
    shore power will charge batteries regardless of what position the switch is in. i usually turn the switch to off when leaving the boat in case the shore power goes out.
     
  5. matt4704

    matt4704 New Member

    103
    Jun 18, 2010
    St. Petersburg, FL
    Sundancer 270
    7.4 Mercruiser w/Bravo III Drive
    I just got this boat and am learning as I go. I plugged into shore and went into the engine compartment to check by battery charger..No lights on and it read 5...Other than dead batteries, how do I determine if it's working or not?
     
  6. matt4704

    matt4704 New Member

    103
    Jun 18, 2010
    St. Petersburg, FL
    Sundancer 270
    7.4 Mercruiser w/Bravo III Drive
    I should add that there was no lights on the battery charger...Not the boat...
     
  7. boatmailster

    boatmailster Well-Known Member

    May 13, 2007
    NY
    none to share
    none to share
    to check: plug boat to shore outlet (make shure there is power in outlet), if you have selector switch for shore/generator - switch to shore, turn on battery charger (could be marked converter) on 120V panel.
    wait 2-3 mins and check if there is any lights on charger (some older pro mariner battery chargers have no lights, just voltmeter). if there is signs that bat. charger is working use voltmeter or better load tester and check if it actually charging batteries. if there is no output from charger - check fuses on output lines, if they are ok -likely battery charger is faulty
     
  8. Jaydelski

    Jaydelski New Member

    10
    Oct 11, 2021
    2013 Sea Ray 240 Sundancer
    350 mag BR3
    While connected to shore power, should EVERY switch on the circuit panel be in the OFF positions to assure proper battery charring is taking place on the 2013 Searay 240 Sundancer?

    Or should I have the "shore power" and "battery charging" switched to the ON position?
     
  9. Stee6043

    Stee6043 Well-Known Member GOLD Sponsor

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    This is a wicked old thread....but it's worth a shot :)

    Generally you do need shore power breakers "on" as well as your charger/converter "on" to get the batteries charging. You should be able to tell when the charger is running by looking at your voltage. It should jump over 13 when the charger kicks in.
     
  10. Jaydelski

    Jaydelski New Member

    10
    Oct 11, 2021
    2013 Sea Ray 240 Sundancer
    350 mag BR3
    Thank You.
     
  11. Pirate Lady

    Pirate Lady Well-Known Member

    Jun 2, 2020
    Chesapeake Bay, Middle River
    '91 250 Sundancer
    7.4 Bravo 1
    No always. My charger is wired to a switch on the shore panel called Convertor. If that switch is off the charger is off.
     
  12. Jaydelski

    Jaydelski New Member

    10
    Oct 11, 2021
    2013 Sea Ray 240 Sundancer
    350 mag BR3
    Pirate Lady, did you mean to say ON always? Not No?
     
  13. Stee6043

    Stee6043 Well-Known Member GOLD Sponsor

    Jun 1, 2015
    West Michigan
    1997 Sundancer 400
    7.4L Gassers
    There's really no such thing as "always" or "never" in used boats. Prior owners could have changed things over the years. But typically, most of the time, generally...both the shore power breakers and your charger/converter breaker will need to be in the on position to get a charge on your batteries. But you really should verify this directly. Your boat should have a volt meter on your main AC/DC panel, correct?
     
    Halfhitch likes this.
  14. Jaydelski

    Jaydelski New Member

    10
    Oct 11, 2021
    2013 Sea Ray 240 Sundancer
    350 mag BR3
    Yes, there is a volt meter.
     
  15. Jaydelski

    Jaydelski New Member

    10
    Oct 11, 2021
    2013 Sea Ray 240 Sundancer
    350 mag BR3
    I only use boat once very moth or two and just want to be sure the batteries are getting a charge when it is stored and plugged into a 15 amp , 120v. circuit at the storage yard.
     
  16. Pirate Lady

    Pirate Lady Well-Known Member

    Jun 2, 2020
    Chesapeake Bay, Middle River
    '91 250 Sundancer
    7.4 Bravo 1
    YES. Thats what I meant to say. All my SRs came this way from factory.
     
  17. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    Visually check your battery charger that the appropriate lights are lit up. Put a volt meter (you can get them for $10) DIRECTLY on the battery before you turn the charger on and immediately after - you should see the voltage jump up significantly.
     
  18. Jaydelski

    Jaydelski New Member

    10
    Oct 11, 2021
    2013 Sea Ray 240 Sundancer
    350 mag BR3
     
  19. Jaydelski

    Jaydelski New Member

    10
    Oct 11, 2021
    2013 Sea Ray 240 Sundancer
    350 mag BR3
    Thank you all. I checked the voltage at each battery and , for my 240 Sundance, the shore power and battery charger circuit on the panel must be in the on position for both batteries to be cha
     
  20. Lazy Daze

    Lazy Daze Well-Known Member TECHNICAL Contributor GOLD Sponsor

    Apr 21, 2009
    PA
    Various
    Various
    Did you anticipate the batteries charging if the power and charger were NOT on? :)
     

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