MTTP controller sez "overcharge" (some times )

uncledave
uncledave Registered Users Posts: 4
in Solar Beginners Corner #1
Hello, The 30 amp MTTP controller on my 400 watt system sez that is over charging the batteries some times,, that can't be good...
What is the most likely issue, please??? Just learning,,,,
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  • Cariboocoot
    Cariboocoot Banned Posts: 17,615 ✭✭✭
    #2
    Re: MTTP controller sez "overcharge" (some times )

    What controller is it exactly?
    Also, are there any other charging sources connected?
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,654 admin
    #3
    Re: MTTP controller sez "overcharge" (some times )

    Do you have a volt meter (that you trust) so you can measure the voltage at the battery / battery bank (and individual cells/batteries)?

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • uncledave
    uncledave Registered Users Posts: 4
    #4
    Re: MTTP controller sez "overcharge" (some times )

    I guess that is my next purchase,,,,
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  • inetdog
    inetdog Solar Expert Posts: 3,123 ✭✭✭✭
    #5
    Re: MTTP controller sez "overcharge" (some times )
    uncledave wrote: »
    I guess that is my next purchase,,,,

    While you are at it, if you have around $50 to spare, get a Sears multimeter with DC clamp-on ammeter function. That is a real life saver for PV.
    SMA SB 3000, old BP panels.
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