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Describe your setup The unit in question is a Must PH1800 (or PV1800, not sure) 4KVA rebranded by Renogen as a PHI-4KW. I'm monitoring it using Home Assistant with [this Modbus to MQTT relay](https://github.com/fakuivan/docker-must-homeassistant). The link points to my fork, I made some minor...

I did some disassembly and it looks like the PV charge controller board receives power exclusively from the PV array, meaning that PV brownouts could be causing the resets. However, I measured the voltage at the PV input and there seem to be no issues there, I even hooked up an oscilloscope just...

Oh that, I didn't clarify it but that's just the way the Modbus register for the pv voltage gets written by the inverter when that communication error pops up, it just writes a zero to it. I've measured the PV voltage when the charge controller is in this failed state and it's just the Voc of...