I have an ESS system with a Quattro and a Fronius on the AC out.
When the AC-in (grid) is ignored (because I do not want the grid on the system when the battery is charged enough) the FRONIUS does not start up. The frequency on the output is above 52 HZ so the fronius does not start up. The general flag with programmable relay assistants are used to ignore the Ac in.
Why is this happening?