[Luckypants]

Well it hasn't been all plain sailing Gary. The battery suddenly decided it was full while the solar was generating (jumped from 70% to full - BMS known bug) so the solar power had no where to go. Cue all kinds of power drops in the house until I worked out what was going on and isolated the solar. I'll need to raise this with the manufacturer / installer to see if they can work out how to avoid this in future. This wouldn't be an issue with a no backup system as the solar inverter shuts down if no grid voltage is detected, to protect anyone working on the lines. In the meantime, I just need to make sure the battery has some capacity for any spare solar in future events.