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RCT AXMAX8k inverter code 69


Kieftus

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4 hours ago, Kieftus said:

Does anyone know why code 69 flashes all the time... According to the manual.. Stops charging the battery... Pylontechs installed.? Thank you 

It just means that the battery is full, and can't take any more charge. It's just a FYI kind of thing.

I suspect it happens more often than it was designed to, because the Axperts overshoot the battery target voltage fairly badly. When you connect directly to the BMS, the Axpert takes the maximum recommended charge voltage (usually 53.2 V) unchanged. It should be subtracting a bit from that voltage, so that it doesn't overshoot and have warning 69 come up. If it overshoots a little more, to 54.0 V (just 1.5% too high) the BMS will actually disconnect from the inverter altogether. I don't know all the consequences of that.

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