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  1. #1
    Member
    Join Date
    Jun 2008
    Location
    Whitehall Wisconsin
    Posts
    491

    On board charger and lithium batteries

    My 3 bank on board charger will output up to 15-16 volts DC at 10 amps if I put a DC-DC voltage regulator to limit volts to 14.5 volts this should work to charge lithium's? Instead of installing a new charger at the added cost I can buy 12 volt 20 amp adjustable regulator for around $10. This would make going to lithium`s much more feasible for me anyone see a problem with this?

  2. BBC SPONSOR/ Shallow Water Anchors Moderator
    Join Date
    Apr 2015
    Location
    New York
    Posts
    10,920
    #2
    its not about the amps it is about the charging algorithm. (or charging profile). You will need a lithium charger to properly charge/ Maintain your lithiums unless it is a Minn Kota precision charger.

  3. Member
    Join Date
    Apr 2008
    Location
    Lakeview,AR.
    Posts
    7,994
    #3
    15 or 16 volts is too high to start with. LiFeP04 batteries should not get charged at more than 14.6 to 14.8. At 15.2 to 15.6 the BMS should be shutting down to protect the battery. JMO Bob
    Last edited by bobcoy; 04-01-2023 at 10:50 AM. Reason: Upper limit edit
    Tell me where has a slow movin' once quick draw outlaw got to go

  4. Member lpugh's Avatar
    Join Date
    May 2009
    Location
    Sacramento Ca
    Posts
    5,168
    #4
    15 plus volts is too high for any 12-volt battery. Get a new charger!
    Thank You Leon Pugh