Had this about 4 times over the past 3 months, the most recent being this afternoon. It lasts enough time to make things beep and clocks reset.
2 x MP2 48/5k - grid on ACin all loads on ACout1
6 x US5000
Running from batteries, pulling about 4kW today but in the past (about a month ago) it has been at night with about 500W.
I currently charge at night and discharge in the day and SoC today when it happened was 84%
I got no loss of grid alarm or any other alarms but when I looked in the data from VRM I see some odd values at the same time.
Why does the output voltage phase 1 drop to zero as this would appear to be the problem especially as I am pulling nothing of interest from the grid - which is aparently disconnected.
I have coincidentally been stood by the inverters during an actual grid fail and I heard the relays open and close, but nothing this time as I was in earshot of them (could be mistaken) and when I checked with the neighbour they had no issues (but they might be on a different phase) so this time it does point to the ACout being a problem not the ACin.
Even so, can anyone explain why the ACout drops?