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Proper Setting of Charge Controller with 24/7 Inverter

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  • Proper Setting of Charge Controller with 24/7 Inverter

    What is the best setting for a charge controller (PWM) where there is always some load? I have programmed settings appropriate for my battery bank type (48V, FLA), but I wonder if the charging voltage should be adjusted for the load.

    What say the experts?

    My specific hardware:

    8x 100W PV solar panels,
    Morningstar TS-45,
    8x T-105RE
    1000W inverter (50W base)
    48-12 DC-DC converter (10W base)

    I have a volt meter connected in order to monitor the battery voltage. I have not seen voltage higher than 52.4, which seems perfectly fine, but I want to make sure the batteries are charged to maximum SOC given some voltage drop from a constant load.

  • #2
    First forget the voltages you are seeing they mean NOTHING on an operating system. SOC voltages are only valid on a rested battery of 6 hours or more without load or charge. Only way to know the true SOC is to use your hydrometer and thermometer. Let me guess you do not have a hydrometer and thermometer right? Get them.

    In the mean time do exactly what Trojan recommends and run your daily charge at 59.2 volts. Meaning set Bulk = Absorb = Float = 59.2 volts.
    MSEE, PE

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