Hi
I am encountering an interesting issue I cannot explain and wondered if anyone has ideas what to check.
I have a DC coupled system with 3 5000US Pylontechs connected in parallel. On the AC side German 3 phase (3 Victron Inv.) in Grid parallel via AC-in with EM540 meter. Ac-Out 2 used for essential loads. Cerbo GX device. ESS in Optimized without Battery Life. Gridpoint tested set at 0, 20 and 50 - no difference.
The Pylontechs charge with consistently app. 70 - 100 W more than is coming in from the MPPTs even when the SOC (40%) is set. That difference is taken taken from the grid. My understanding was that the grid would only be used for charging the battery if they happen to fall below the minimum SOC and otherwise only whatever is coming from the MPPTs is used.
What am I overlooking? I’ d really appreciate any ideas - I am at my whit’s end.
Many thanks,
Matthias