I have a 3 phase ESS system with 3x MultiPlus-II 5 kVA / 48V, firmware v556.
There are no loads connected yet, just testing with the Multis with DC coupled PV and a Fronius inverter on the AC Out side.
Multiphase Regulation is set to Total of All Phases.
Cerbo GX firmware v3.60
I’ve noticed that the inverters do not share the DC export equally.
I’ve also noticed that if I disable and re-enable DC feed-in, the distribution of power among inverters changes, but it does not equalize. The two attached pictures are taken a few minutes apart, after turning off and on DC feed-in.
Curious if changing the regulation mode makes any difference (technically it shouldn’t)?
If you disable the fronius and just use DC exporting how does it look then?
Changing to Individual Phase does not fix the problem but it changes the power distribution.
Turning off the Fronius and keeping just the DC export does not fix the problem and does not change the power distribution.
Sometimes the inverter on L3 is almost idle, sometimes (after changing a setting) the inverter on L3 takes the highest export power share…
I saw the same today. Saw it already before occasinally. But today one Multi 5000 was at full load (~4kW) while the others just fed in a little…
Didn’t see your entry, thus I also created one:
