Challenge question----
I know about the expected 10min MPPT output dips we see due to the re-peaking of the MPPT, but I also have these every 10s or so. Very periodic, always the same frequency.
I dont always see this, especially when power is lower.
Its not the connections, as far as I can tell. Its not perfectly timed clouds. Not some bird messing with me on the roof.
I have a 250/60 unit with 3S2P making about 130V. Firmware is current.
Is this normal?
The tracking usually happens on the PV voltage. So not the same graph as the one you are looking at. You are possibly about to enter or are in absorption stage there maybe? So constant voltage lower current. I assume you have no other loads on the battery or system?
No, these dips are seen in bulk, far from absorption. The 10min dips are seen in both the battery and PV current.
Are there any examples of what the power vs. time will look like when there are various problems? I'd like to see what a bad connection point looks like (even though I believe mine are all good).
Update -- these 10s dips still happen intermittently on my 250/60. I've added a 150/45 unit also for a while and it has never shown this behavior.
Is there a problem with the 250/60 unit I have? Anyone?
Can it be that this is the Search Intervall of your inverter sitting in eco mode?
It fits that you say it’s only in a low solar scenario, otherwise the MPPT would compensate it.
Eco mode is OFF and only one of 2 MPPTs do this.
Has anyone looked at the plot of MPPT power through Victron Connect in a 1s time interval and seen this?
