Has anyone managed to find a way to ac couple s hybrid fronius with its own battery bank, to a dc coupled off grid victron system.
The project requires redundancy. In case if failure of victron system, the fronius and it’s battery must be able to power loads, without grid and without solar.
How can we do this?
This has been posted multiple times by multiple people, and nobody has ever answered. I guess nobody knows how to do it, or maybe not possible?
I also would like to know if this setup is possible: Now I have an HV battery connected to a Fronius GEN24 Plus. i would like to have a MicroGrid powered by a Victron Quattro inverter/charger with a battery of minimal capacity.
The question arises because I already have a self-consumption system with the Fronius GEN24 Plus and a 12 kWh battery, and I am now looking to improve the system’s resilience to grid outages by placing a Victron between the public grid and the internal network (MicroGrid).
One of my concerns is whether the Fronius would still be able to use excess solar energy to charge the existing fronius HV battery and utilize the stored capacity to inject power into the MicroGrid as requested by the Victron.
Ideally, I would like the LV battery connected to the Victron to always remain charged to serve as a backup during public grid failures.
Is this configuration feasible? Has anyone managed to make it work?
thank you very much!
Maybe I am missing the point here but the answer is quite simple.
On the Victron side you setup the whole grid to pass through Victron and setup ESS assistant with ‘keep batteries charged’. Pretty much like most installations out there. Then on AC output you couple the Fronius system, like an on-grid solution. Your load also goes on AC output of Victron.
I must be missing something as this is quite a common setup…
That is what i think also. But as i could not find any documentation with battery on fronius side and no schematics on a setup like that so the question…
Victron doesn’t care what Fronius has behind it and where it gets its power from.
I believe that is true. My question is on fronius side as power demand is controled by victron via frequency and before fronius had the power meter. Will fronius know when excess power is reached to charge battery?
Frequency shifting kicks in only when grid is off. Else it will talk to Fronius over Modbus tcp using Cerbo or gx device to control its output.
If you add a Fronius Smart meter and set it up so that the Fronius Inverter thinks your Victron Inverter is the grid. Have it wired so all your electrical loads are connected to the Fronius side of the Smart Meter and set the Fronius to 0 export. You will have to set the Fronius charge settings to your needs. When setup like this your electrical loads will draw power from the Fronius up to the limit you set and then the rest of the power will come from your Victron inverter. If there is a failure in the Victron inverter the Fronius can switch to Emergency Supply, but I think that takes 30 seconds from loss of power till it starts up.