onboard battery charger

Discussion in 'Electronics Q&A' started by Dennisb, Sep 15, 2018.

  1. Dennisb

    Dennisb New Member

    6
    Aug 26, 2018
    1988 Sea Ray 34 express cruiser
    454 Mercruiser inboards
    My 1988 340 Express Cruiser seems to be cooking my batteries. The shore power converter light (green) on my cabin panel never goes out. Most recently replaced battery looked like it was only 3/4 full of electrolyte. Do I need a new charger or a smart charger?
     
  2. Wylie_Tunes

    Wylie_Tunes Active Member

    522
    Oct 26, 2012
    Lake Wylie NC area
    N/A
    N/A
    Your current charger can be over charging by output level or because its continuously charging. A new modern multi stage smart charger should fix both of these scenarios.
     
  3. Dennisb

    Dennisb New Member

    6
    Aug 26, 2018
    1988 Sea Ray 34 express cruiser
    454 Mercruiser inboards
    Thanks, Wylie. I agree a smart charger is the way to go.
     
  4. juggernaut1

    juggernaut1 Active Member

    773
    Apr 19, 2015
    Perth, Western Australia
    2006 38 Sundancer
    8.1S / ZF 63V Drives
    Promariner Pronautic chargers are a popular replacement amongst the ranks. Have one myself after replacing the original.
     
  5. Dennisb

    Dennisb New Member

    6
    Aug 26, 2018
    1988 Sea Ray 34 express cruiser
    454 Mercruiser inboards
    Thanks, I will look into these Pronautics.
     
  6. Craig

    Craig Active Member GOLD Sponsor

    123
    Feb 8, 2007
    Maryland
    2006 320 Sundancer
    twin 350 Horizon V drives
    +1
     
  7. dtfeld

    dtfeld Water Contrails GOLD Sponsor

    601
    Jun 5, 2016
    Milton, GA
    410 Sundancer 2001
    Cat 3126 V-Drives
    I replaced with a Pronautics. Good Charger. However, if you have flooded cells, you need to keep them topped up with distilled water occasionally.
     
  8. Dennisb

    Dennisb New Member

    6
    Aug 26, 2018
    1988 Sea Ray 34 express cruiser
    454 Mercruiser inboards
    Yes, good advice. Wonder why my batteries are not sealed though? Maybe my mechanic used cheap ones.
     

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