Hi Daniel,
I have a Victron Energy ESS system with AC coupled PV and DC coupled PV. And I am running version 2.17.55 of Batrium. Grid feed in works perfectly from AC and DC coupled PV in my system.
Of course, you need to activate “feed in excess” in the Grid feed-in menu in ESS settings for AC and DC according to your system setup. I read, you manipulated your feed-in previously by configuring a high negative grid setpoint. I think, this is very bad practice, but unfortunately adviced by some very unexperienced tinkerers in German forums. Don’t do it that way. Please ignore my configured feed-in limit. This is necessary in my system as I configured my Fronius Symo for “Zero and Limited Feed-In” and then the Victron system then needs to tell the Fronius through sunspec protocol how much energy to produce at maximum.
Keep in mind, that charge current limits do not apply in the Victron system anymore, if you activate grid feed-in from DC as solar chargers then need to provide their full current. You’re right with the 0.4V charge voltage increase to get the grid feed-in from DC started. In my system these higher voltages only appear shortly, when grid feed-in from DC ramps up. Once this is stable running, charge voltage goes back down to charge voltage limit reported by Batrium.
Kind regards,
Marcus