My ESS with 2x 48/3000/50 (Parallel, one phase) system worked well, after updating to firmware 2620490 the second Multiplus is going to overload after switching on.
Removed the Parallel function, reset to stand alone, still the same.
(Of course removed all AC in- and out to test)
Flashing the Firmware back to 2620433 did NOT solved the problem, flashing the firmware was without problems.
You hear the Inverter wants to start, as you hear the Transformer a short period.
How can this happend? The system worked well for some years.
Is the Multiplus dead, and must be repaired? Or any other suggestions?
Sander van Noort
PS. The first Multiplus is now setup as Standalone, and is working fine with the 2620490.
In winter i can live with one, but is sommer i need the extra power for a heatpump.