FM80 logging question

706jim
706jim Solar Expert Posts: 527 ✭✭✭✭
in Off Grid Solar & Battery Systems #1
I've  run an FM80 charge controller for a few years now. Recently, I've notice two logging days where nothing was recorded; every category reads zero (max/min volts amps etc).
Any ideas what may have caused this and if it's something to be concerned about?
Island cottage solar system with approximately 2300 watts of panels, 1kw facing southeast 1.3kw facing southwest. All panels in parallel for a 24 volt system. Trace DR1524 MSW inverter which has performed flawlessly since 1994. Outback Flexmax 80 MPPT charge controller four 467A-h AGM batteries. Insignia 11.5 cubic foot electric fridge 1/4hp GSW piston pump. My 32nd year.
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  • SumPower
    SumPower Registered Users Posts: 125 ✭✭
    edited October 2025 #2
    @706jim, it would probably best for you if you post this over at the outback power forum. In the flexmax threads.


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  • 706jim
    706jim Solar Expert Posts: 527 ✭✭✭✭
    #3
    Can't seem to get this forum on line anymore. Otherwise I agree with you.
    Island cottage solar system with approximately 2300 watts of panels, 1kw facing southeast 1.3kw facing southwest. All panels in parallel for a 24 volt system. Trace DR1524 MSW inverter which has performed flawlessly since 1994. Outback Flexmax 80 MPPT charge controller four 467A-h AGM batteries. Insignia 11.5 cubic foot electric fridge 1/4hp GSW piston pump. My 32nd year.
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  • JRHill
    JRHill Registered Users Posts: 479 ✭✭✭✭
    #4
    Logging as to the Mate3 SD card or to OpticsRE?

    BTW, forum.outbackpower.com is working  just fine.
    Off Grid. Two systems: 1) 2925w panels, OB VFXR3648, FM80, FNDC, Victron BMV-712, Mate3s, 240 xformer, four SimpliPHI 3.8; 2) 780w, Morningstar 30a, Grundfos switch, controller and AC/DC pump, 8 T105. Honda EU7000is w/AGS. Champion 3100. HF 4550, Miller Bobcat.
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