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I have read the Victron document concerning ac-coupling and Factor 1.
I was wondering if the 1:1 ratio still applied in the situation below (see diagram) if the system is off grid and the batteries are connected to the Sofar. Thanks.
(It would be impractical to rewire the system to just use the Victron at the moment)
The 1:1 ratio is for AC PV that has no battery on it. I think in your case you may be fine.
Are you planning on using ESS there? What would be the purpose of the Victron in this system? And FYI the Victron does have a minimum battery requirement for safe operation.
l was just planning on using the PV inverter assistant which I assume would add a level of safety. The purpose of the Victron would be provide a pseudo grid as the ME3000 is a grid tie inverter but this system would not be connected to the utility grid. I am hoping a small battery is enough to initialise the Victron and once active the Me3000/PV/battery would keep the system going.
Is there a formula to determine minum battery size?
Just realised diagram was incorrect so see revised.
I was wondering if the 1:1 ratio still applied in the situation below (see diagram) if the system is off grid and the batteries are connected to the Sofar. Thanks.
To answer this question, yes the 1:1 rule applies to all AC coupled systems where the PV inverter is behind the Victron inverter and there is no grid present. The reason is that the Victron inverter has to be able to handle the full power the PV inverter could deliver.
