It says:

. No normal person can watch their flock the whole day. Free ranging may even be safer than being locked in, in such a non-electrified fence if there are no proper hiding places and you don’t have an alarm system.
I don’t know much about the typical US predators. But foxes and dogs can easily dig underneath or jump over it.
It might work as an extended run to give the flock extra run space at the end of the day, if you are out and about, or working in the garden.
And what about aerial predators?
I doubt this too. It certainly isn’t a fort Knox you can trust during the night imho.
I have a neighbour with a mini-pig in a pen with electrified netting. When the grass against the netting is high (reaches the first electrified thread) and its raining, it often fails to work properly. Can’t even remember how many times she broke out.
They started with a solar panel and a battery. But it didn’t charge enough in winter. Now it’s on electricity with a cable from the house.