Hey there,
following situation:
3x Multiplus II 48/5000 in parallel Mode, offgrid, controlled by a Cerbo GX and all PV DC coupled.
Battery Bank is Lifepo 130kWh usable.
I have a Multiplus 48/3000 GX laying (yes its already there and unused) around.
From time to time it would be nice to have a bit more AC Power on the system.
My question is now if it's possible to configure the Multiplus 48/3000GX in ESS Mode 3 and connect it to the AC out of the 3x Multiplusses5000 via AC In on the 3000. Disable charger completely and just enable discharge. I know that ESS Mode3 is configurable like that
In the Cerbo GX a "switch" (either relay or network/modbusTCP) that tells the Multiplus3000 to discharge with 3000 Watt wenn AC load is higher than 5000 Watt and to disable discharge when it's below 2000 Watt.
That way I would gain a nice AC boost. At the moment I start reducing loads (EV Charging, water heater, water pumps ...) when the load is above 9000Watt.
In theory this should work, but what happens when for a couple of seconds the AC Load is less than the 3000 watt that the Multiplus is feeding and does not stop feeding that fast?
In theory exactly same situation like with a AC PC Inverter that es feeding AC wise.
This would f.e. be the case when the EV Charging stops (drop of a 7kW load).
Will the 3x 5000er feed that energy back to the battery bank for that couple of seconds?
Thanks in advance!