I’ve go a UPS now and can do a graceful shutdown of HA when the UPS battery gets to, say, 30%, which takes about 30 minutes. The shutdown itself seems to take about 5 minutes (is that normal?)! Once shut down the battery could then last a while with no draw and the power could come back on before …

Rebooting HA after a power cut with UPS and controlled shutdown

at9 (Adam) November 24, 2023, 11:53pm 2

If your NUC supports wake on lan you could do this with an esphome not connected to the UPS.