I need some help please. I want my inverter to run 99% off grid, only using the grid in emergencies to charge the battery and take the load when there is no solar. It seems I have achieved that goal 99%. It mostly works as required, except for when the load exceeds my battery's 50a limit. It then switches over and supplies the load from the AC supply(as expected). The problem is that even if I switch off the large load, it keeps on supplying the the small load,(my pc) from the grid and does not change back to the battery.

Does anyone know if there is anything I can do? Will a firmware update help? 

Sorry, cancel. I was too impatient. It seems it takes about 5 minutes but it does revert back to battery power after I decrease the load.