sirpatchuk If I set it to 100% charge then (as you can work out) it will be charging the battery at more than 3KW an hour.
There have been occasions where this has happened. On these occasions the GivEnergy battery has switched itself off.
This seems odd. Are you saying your inverter charges at a higher charge rate than what your battery can cope with?
What is your WattID please, so we can validate this for you?