Schneider 4048 f1 AC Output Under Voltage

cmsolera
cmsolera Registered Users Posts: 4 ✭
edited February 2023 in Off Grid Solar & Battery Systems #1
i have an Schneider 4048.  During startup, the mode is inverter, and theres a popup, showing AC Output Under Voltage. 
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,613 admin
    #2
    Is the popup warning temporary (goes away after inverter has started)?

    Have you measured the DC input voltage to the AC inverter and it the input voltage is staying above ~42 VDC?

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • cmsolera
    cmsolera Registered Users Posts: 4 ✭
    #3
    The error reset and then it start again to try to start the inverter and the fail again.  The voltage during the startup is about 55 to 51, because the solar panels are supply maintained the voltage. 
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,613 admin
    edited February 2023 #4
    Sounds OK... What is the battery bank AH rating (type of batteries, etc.)? For flooded cell lead acid batteries, typically suggest a 4,000 Watt @ 48 VDC inverter should have a minimum of 400 AH @ 48 volt FLA battery bank.

    -Bill

    Should add that need to have relatively heavy/short cables from battery bank to carry the current:
    • 4,000 Watts * 1/0.85 AC inverter eff * 1/42.0 volts battery cutoff voltage = 112 Amps max continuous current @ full load
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • cmsolera
    cmsolera Registered Users Posts: 4 ✭
    #5
    In this moment i have a 48v bank with 250ah gel battery
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  • BB.
    BB. Super Moderators, Administrators Posts: 33,613 admin
    #6
    Should not cause a term/startup issue (assuming good quality GEL batteries).

    DC wiring AWG and length from battery bank to inverter DC input.

    -Bill
    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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  • cmsolera
    cmsolera Registered Users Posts: 4 ✭
    #7
    DC wiring is good.  The system work without problem at the beginning of the installation, the problem begins after a maintenance shutdown.
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