I have a 9.5kWh battery and AC3 inverter that has been in for 13 months and has worked perfectly until yesterday when the overnight timed charge didn't happen. Earlier yesterday I had started some forced charges from Home Assistant because I am trying to automate charging the battery during Intelligent Octopus cheap periods. This is the first time I've done this and it seems too much of a coincidence that the scheduled charge should fail the next day.
I have checked all the settings and it is correctly set up for a timed charge. I have now reset the inverter to default settings and have tested that the timed charge now works correctly (I set it for a 15 minute charge earlier this morning and this worked OK). I'm fairly confident it will work as normal tonight, but don't understand why it failed last night and would be grateful for any suggestions.