I have a Grid-Tied Quattro 48/15000 with 860 Ah of battery power with a usable 20 kWhr .
My maximum allowable grid usage is 5.5kW and I have a PV array of 36 panels with a peak output of 8KW.
There are two 18/250w MPPT’s attached that act as charge controllers and supply AC power when required.
It is setup as an ESS system with Self consumption (With Battery life) and DVCC disabled
The problem is that the system prioritises the Grid input over spare PV power. Therefore it is inefficient and I am paying for grid energy when spare energy is freely available from the PV/MPPT.
I am reducing grid power usage by modifying the 'Grid set point' in ESS depending on the weather and my energy requirements. Ie When I have a high demand, I set the grid to maximum and at night reduce this down to a much lower level.
Is there a way to instruct the system to use maximum PV output for AC and only use the grid to fill in any shortfalls?
The installers here in Spain do not have a lot of experience of these Victron systems and have not been that helpful in fixing these complex issues.