Hello, this is my first post . I’m curious about the response i’ll get :-). I.m planning and installing a 3 fase ESS system based on Muiplus-II 48/8000/110 modules. The accu technolgie i’m using for this system is LiFePO4 16kw as a start. I also have about 9kw NMS accus also i’d like to use which i cant combine at the DC bus. The idear is to buy extra single fase Victon 48v which wil manage this accu. The question i have is can Cerbo see both accu systems and can it deal with them they don’t interfere eachother. I als have Home-Assistant available. The 3 fase system is my main ESS system and will expand this storage in time if necessary. The single fase converter is just optional and more as backup. If i undestand it wel i can also deliver de single fase on the ac-out side via de 3 fase ess system to the other fases with some loss in the converters ? Like to hear youre ideas and recommendations.
You can. But it is more ideal to have its own GX for better battery management of that second bank. Because the GX ideally would only be managing one battery bank in DVCC.
See the cerbo manual under connecting victron products.
Summary
Connecting multiple VE.Bus systems to a single Cerbo GX
Only one VE.Bus system can be connected directly to the GX device’s built-in VE.Bus ports. To connect additional systems, consider the following options:
Option 1: Use an MK3-USB interface
This method allows multiple systems to be visible, but with limited functionality:
Only the system connected to the built-in VE.Bus ports contributes data to the Overview pages.
All connected systems appear in the Device List and are included in VRM energy statistics.
DVCC and ESS control applies only to the system connected directly to the built-in VE.Bus ports.
Additional Systems connected via MK3-USB do not support DVCC control and will follow their own internal configuration for charging/discharging.
There is an option (Settings → System Setup → Charge Control) to enable BMS control of a secondary inverter/charger connected to a GX device via an MK3-USB interface. When enabled, the secondary device will follow the CVL and DCL values provided by the CAN-connected BMS.
Generator start/stop logic applies only to the directly connected system.
For ESS systems, only the system on the built-in VE.Bus ports participates in ESS mechanisms. Others are visible in the Device List only
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Thanks this gives me a good direction 