Can a 32 volt 940ma charger charge a 24 volt battery pack?

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RayHeckbert
RayHeckbert Registered Users Posts: 1 ✭
in Advanced Solar Electric Technical Forum #1
Can a 32 volt 940ma charger, charge a 24 volt battery pack? Or is the voltage too high?
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  • Estragon
    Estragon Registered Users Posts: 4,496 ✭✭✭✭✭
    #2
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    It depends on the size, chemistry, construction, temperature, and state of charge of the battery.
    Off-grid.  
    Main daytime system ~4kw panels into 2xMNClassic150 370ah 48v bank 2xOutback 3548 inverter 120v + 240v autotransformer
    Night system ~1kw panels into 1xMNClassic150 700ah 12v bank morningstar 300w inverter
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,439 admin
    #3
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    And the charger itself (it should limit its output current to 940 mAmps even if charging a 12 volt battery)--But less expensive chargers can overheat if charging too low of voltage (too high of current).

    And as Estragon posted... 32 volts into a 24 volt battery is a bit on the high side--But can be done for a flooded cell battery. If the battery is some sort of sealed lead acid battery (AGM, GEL, VRLA), normally, the charging voltage would be around 28.4 to 28.8 volts maximum (and when the battery is fully charged, disconnect the charger to prevent battery damage).

    If other chemistry (the various forums of Li Ion or NiMH, etc.), all bets are off.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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