Hi @Rob
I understand your point and I was just about to pop the information here for the public to see. The reason I tend to request a private message first is just in case it requires private information to go back and forth. It's a matter of security which we take seriously. You're right though, so here's the information I provided.
When you switch the battery into bypass, it won't start charging the battery, it will give those blackout protected circuits power purely from the gid.
If for example, you have a battery backup protected circuit and there is a blackout, the battery will continue to power the protected circuits until there is no charge in the battery - then there will be no power to the home until the grid is back online.
The inverter of your solar PV system needs grid power to turn DC power into usable AC power - in the event of a blackout the inverter would not work, so the battery would not get any charge.
So in summary, you're correct, if your fridge is on a black out protected circuit and the grid goes out, you would likely lose the contents of the fridge on the battery has drained if you're away for an extended period if time.
The bypass switch would be switched if the battery began experiencing a fault and stopped supplying power to the home - at this stage you would need to bypass the battery.
