I experienced issues with dynamic power limiting (SolarEdge SE17K) on version v3.80-33. I then reverted to version v3.80-32, after which I had no further problems with SolarEdge/dynamic power limiting.
Now, with v3.80-36, the result is the same as with v3.80-32.
After 13.00u solar power reduced. (I experienced the same effect with v3.80-33.)16.00u rolled back to v3.80-32.
Today no clouds at all. Battery 70%. No reason to limit pv power.
I will try v3.80-36 again next week.
Same problem today with v3.80-32. Dynamic Power Limit reduced my PV power for no apparent reason (or so I assume). The battery was nowhere near full. Electricity prices were slightly negative, but not negative enough to trigger grid charging. Yet, Dynamic Power Limit still throttled the PV output. I don’t understand why. Perhaps it’s related to DESS?
I’ve now reinstalled v3.80-36. I’ll wait and see how things go tomorrow—or perhaps just disable Dynamic Power Limit for the time being.
I restarted the SolarEdge and the Cerbo.
Everything seems to be working normally again today. (v3.80-36). No strange Dynamic Power Limit behavior today so far.
I temporarily switched the SolarEdge to AC-in (using a changeover switch to easily switch between AC-in and AC-out), though I don’t really expect that to be related.
Did you check your AC In voltages for that day?
I also recently encountered apparent throttling of my ACPV (Which is not controllable) and during figuring out what was happening there, I noted, that our Grid Voltage was at 251V that day. 250 to 253V is the range, where PV Inverters following the german grid code need to reduce their power-output, no matter if “your” battery could take the power or not.
So yeah, in some sense that means: if your neighbors push the grid to the limit, your solar inverters will start throttling on their own due to gridcode compliance. (I don’t know these limits for netherlands but a first look if grid-voltage was unusual high could be worth a look)
I don’t think that’s the problem. I checked, and the AC voltage was well below 240V that day. Since I no longer feed 17kW back into the grid during the day, excessively high voltage is no longer an issue; besides, I installed a Victron system for my neighbor last month, so he isn’t feeding power back into the grid during the day either.
In the Netherlands, the AC PV inverter shuts down at 253V.
