Hi,
I have a functioning 2-phase setup with 2pcs Multiplus-II 48VDC/5000VA, on a 3-phase supply.
ESS-System is controlled through Node-red, on a RPI Cerbo (Venus operating system w. NodeRed).
Both inverters are connected to same Venus, using an USB-VMEBus adapter.
System is configured to dual-phase 240dgr phase-angle using Multi-VEConfig.
System is grid-connected and backfeeds to house/grid through ACIn only. No connections to ACout1 or ACout2.
System does not have grid-meter connection, but that is achived through NodeRed power-setting.
Questions:
A) I would like to control these inverters independently. Right now, the Venus “does something” and loadbalances the charge/discharge as a single system.
Is there a way to do this without using a separate Cerbo/Venus+USB-VME-adapatror for each inverter?
Can I select a setting so it looks like two indenpendant inverters, with out joined 3-phase supply, so it does not monitor phase-angle etc?
B) The control-ramp once grid-connected seems quite slow. But more problematic is the power-level when Inverting/Charging at constant ESS-setpoint fluctuates quite a bit (+/- 100W). Is there any parameters for this?
C) Just to be sure, can someone verify that writing powerlevels to ESS through node-red does not wear out en EEPROM or similar. So its only DRAM accessed and not constantly burned in NV/EPROM?
I hope these questions make sense, let me know if more information is needed?