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ebrahim

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    ebrahim reacted to Coulomb in back to discharge voltage, Axpert 5KW inverter with pylontech 3.5 battery   
    It doesn't make sense (to me) to put it above the bulk/absorb charge voltage; it would then never switch to battery mode unless the utility goes down.
    Where you put it is a personal preference. The higher you put it, the more time you spend on utility, so it costs you more on your utility bill. But also the higher it is, the better the chance that the battery will be at its fullest, ready for load shedding.
    Personally, I leave it lower, since I don't have to worry about load shedding here. If you want the battery to be really full before switching over to battery mode, use the setting value FUL.
  2. Like
    ebrahim reacted to Coulomb in Axpert settings vir Pylontech 3.5 kw   
    For one Pylontech 3.5 kWh (US3000B) battery:
    Setting 02 (maximum charge current) should be 30 A
    Setting 05 (battery type) should be USE (user battery type)
    Setting 12 (back to utility voltage) should be 48 V
    Setting 13 (back to battery voltage) should be 51 V, or possibly 50 V for less utility usage
    Setting 26 (bulk/absorb voltage) is recommended to be 53.2 V, though I personally would use a lower value like 51.8 V
    Setting 27 (float voltage) is recommended to be the same or a little lower than setting 26, e.g. 53.2 V, though I would personally use a figure like 50.3 V.
    Setting 29 (low DC cutoff voltage) should be 46.5 V, or 46.0 V to avoid low battery warnings.
    I hope this helps.
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