Hadn't thought about my bike for a power backup because I have a generator that we use for power outages, and my electric car can be fitted with an external inverter to power household items for well over a week. The car can also recharge my ebike. I do have two portable solar panels that I used to trickle charge the deep cycle batteries in my horse trailer (that supplied internal living quarters power) - I can always use that system for recharging my ebike (solar to deep cycle to ebike).

I'm too far into the rural areas to use the ebike for transportation. It's just a recreational toy.