3 Day Test?

[Lightspeed]

3 day testing of BOL is a good idea, but still slightly artificial as you know its coming and will subjectively have prepared for it even if you didn't mean to.

When grid goes down unexpectedly and without any warning, this tests plans more thoroughly, by showing up shortfalls.

As with everything, the greater the frequency of the unexpected power cuts the less unusual they become, and the easier they are to deal with.