Actually saw this happening live, so I know what actually happened (afterwards there’d be no way to figure it out). My production graph shows a 1 hr gap in production from my SolarEdge system. At 8am PDT PVOutput started recording my data at 9am PDT and it did this for an hour. Then when 9am PDT rolled around, the old 9am data (which was really 8am) was overwritten. At the same time the SolarEdge site didn’t show this issue (i.e. it was recording at the right time).
Anyone else see this?