Limit AC current Multiplus II 5000 20A

I have this situation:

The Grid fuse from the electricity provider is fused at 25A. The breaker to the Victron Multiplus II 5000 will be 20A. How can I set the victron to a maximum input/output current on the Grid AC port to 20A while still having the ability to use 45A (grid + multiplus) and using zero import/export (while of course this only works up to 20A and the excess above 20A will be used from the grid)?

Hi you will have to set an AC input limit in the multiplus in VE config

Thank you!