Are all the panels the same make and model, and are they all on the same surface with no shadowing at this time of day?
Reach out to Epever and ask them what the problem is. Don't accept an answer from them if they come back with a non-sense answer.This morning it's quite dark and grey with heavy rain. The 780w string going to the Epever was on 19v and only producing 19 watts while the other two strings were working more as expected. So I popped the PV fuse breaker to cycle it and yes indeed it came back on at 110v and started producing better power.
About 5 minutes after the hot water cylinder had turned off and the load had gone, the Epevers let the voltage rise back up again to a more expected power output relative to their array size.
He hasn't updated his firmware and isn't this what you were having problems with before your firmware fix?That's just weird. I don't get why they would be doing that.
Today we had a lot of clouds too. I watched the power output vary up and down with the shadows going by. At no time did they drop down to battery voltage.
Here's the log from the smart shunt.
How are your units wired up? I don't get why a heavy load on the output with affect them at all. Do you have anything connected to the load terminals on the controllers?I was watching when it happened and they both did it at exactly the same time. Even though they are not networked together.
So it must be something they are programmed to do.
How are your units wired up? I don't get why a heavy load on the output with affect them at all. Do you have anything connected to the load terminals on the controllers?