Solar Guppy
Red Cobra Guppy
This is a site issue, and the cause could be a momentary rise in the grid voltage as seen by the inverter as it is the source, not load triggering as UL1741-SA power reduction as I linked in the previous post.
Your graph above are DC values, I'm discussing AC values as the trigger. We don't need to prove the mppts are the cause, they are just how the inverter throttle the harvest. There maybe a separate issue of how the unit handles edge of cloud events, ( the zeroing and resuming of power delivery ) but one issue at a time
While turning on loads some where else could help, it may not if the issue is rise in voltage as the inverter sees it with wiring from the inverter to the main panel.
Get yourself a DVM that has peak hold function, this will see detect and hold the reading. Here is one on amazon the might do the job, but you can search using digital multimeter hold as the key words.
Adding a large load, at the inverter on the grid port itself should be the next test and or having a peak hold to measure the AC voltage. The data logging you have just points to the direction, 5 minute logging can't do a smoking gun on issues like this.
Your graph above are DC values, I'm discussing AC values as the trigger. We don't need to prove the mppts are the cause, they are just how the inverter throttle the harvest. There maybe a separate issue of how the unit handles edge of cloud events, ( the zeroing and resuming of power delivery ) but one issue at a time
While turning on loads some where else could help, it may not if the issue is rise in voltage as the inverter sees it with wiring from the inverter to the main panel.
Get yourself a DVM that has peak hold function, this will see detect and hold the reading. Here is one on amazon the might do the job, but you can search using digital multimeter hold as the key words.
Adding a large load, at the inverter on the grid port itself should be the next test and or having a peak hold to measure the AC voltage. The data logging you have just points to the direction, 5 minute logging can't do a smoking gun on issues like this.