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jfmm

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    jfmm got a reaction from Coulomb in AXPERT MAX II 8kw firmware   
    Hi,
    I currently have the automatic "wake-up" mechanism working.
    When the MPPT voltage is between 95 and 105 V, and the current is above 0.5 A, the MPPT input is switched off for 1 second, which causes the MPPT voltage to rise and consequently the power as well.
    It's working correctly, however, I'm going to try another approach instead of interrupting the input. Although the interrupted power is around 50 W, a load interruption is never good for the electronics...
    Therefore, instead of cutting off the input, I'm going to apply a momentary load of a resistor in parallel with the input, in order to simulate shading. I hope it works.
    Attached are the voltage, current, and power graphs of the MPPT before and after applying the input cut-off automation.

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