I am facing an issue with my system, which is made of the following :
Multiplus 48/10000/140/100, Fronius Primo 8.2-1 on the AC out with 12kwp solar panels, 75kw Li-ion battery pack on CAN BMS, and an MPPT150-35 with 1.2kw solar panels on the DC side. An external EM24 ethernet meter is used. All are to the latest firmware.
The system is configured as ESS, with limited injection, and DVCC is ON.
And now the issue :
When I activate the DC coupled surplus injection in the ESS settings, the Charge Voltage Limit (CVL) is not anymore followed by the system. Instead, the batteries are charged to CVL+0.4V. This seems to be "normal", as per Victron DVCC operating manual. However, when there is no more sun, the batteries are discharged to the grid at the limited power defined in ESS/Grid Injection settings, until the battery voltage reaches CVL.
With DC coupled surplus injection de-activated, the battery charges to CVL (not more), and there is no grid injection from batteries when there is no more sun.
Request (please) :
Since I did not find it, is there an option to avoid draining battery in the grid with DVCC and DC coupled surplus injection activated, and remove the +0.4v offset? Otherwise, it would be of great use to add it.