Just a quick observation:
Today I had an unscheduled power outage just before peak at 3PM. Powerwalls (2) were at 100% and solar was being returned to the grid. There was a quick pause in power (a few none UPS devices restarted and one needed manual restart). Frequency jumped to 60.3 which was enough to shut down my two Fronius and one Delta inverters.
I was watching the PW charge state as well as the frequency for about an hour with a Kill a Watt. Occasionally the frequency would dip to 60.2 and that was enough to restart the inverters. I was only drawing 600 watts for the house at the time. During another event the house was drawing 1.5 kW and the frequency was 59.99 Hz. The PWs were still at 98% but probably at the low end. So that game of going between 60.2 and 69.3 seemed to go on for awhile.
But at around 5PM my solar was starting to fade with shading and cloud cover and the max was about the house consumption so the frequency one again returned to 59.99 Hz.
Seems to me that at 98%, with only producing a few kW they could have kept the solar alive but I am probably splitting hairs. Maybe because my systems seem to be all or nothing at 60.3 Hz.
Today I had an unscheduled power outage just before peak at 3PM. Powerwalls (2) were at 100% and solar was being returned to the grid. There was a quick pause in power (a few none UPS devices restarted and one needed manual restart). Frequency jumped to 60.3 which was enough to shut down my two Fronius and one Delta inverters.
I was watching the PW charge state as well as the frequency for about an hour with a Kill a Watt. Occasionally the frequency would dip to 60.2 and that was enough to restart the inverters. I was only drawing 600 watts for the house at the time. During another event the house was drawing 1.5 kW and the frequency was 59.99 Hz. The PWs were still at 98% but probably at the low end. So that game of going between 60.2 and 69.3 seemed to go on for awhile.
But at around 5PM my solar was starting to fade with shading and cloud cover and the max was about the house consumption so the frequency one again returned to 59.99 Hz.
Seems to me that at 98%, with only producing a few kW they could have kept the solar alive but I am probably splitting hairs. Maybe because my systems seem to be all or nothing at 60.3 Hz.
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