dunno if it would all work out OK in a worst-case situation, but it's a better bet than anything that runs on batteries.
I think there are different solutions for different scenarios. Battery back up and capacity is expensive energy storage with limited capacity, but an apartment dweller has limited choices and fossil fueled electricity generation simply is not feasible for many.
Even as a homeowner with generators I do find battery storage capacity a useful adjunct as a short term bridge and allowing me to not have the generators running constantly. I can opt to run portable generator for large loads and also recharge batteries and still handlesmaller constant loads when the generator is shut down..
Alternatively, a few portable solar panels can allow for recharging of battery cells as well..
I am a fan of multiple redundancies and options.. In germs of preparedness, the concept is if you have 2, that is good because you will still have 1 if 1 fails…. If you have 1, what is your plan if suddenly you have none?
I lived through a major Ice Storm in 1998 that was so severe that large metal towers on transmission lines collapsed under the weight of the ice. We experienced 3 days of freezing rain… There was an inch and a half of ice coating all of the tree branches. The town I live in is adjacent to another town and combined population is around 70,000. At one point there were three gas stations still open and able to pump gas and there was a line a mile and a half long to buy gas…. Upon the order of the governor grocery stores were ordered to open with portable lighting and battery calculators to ring up customers…. I walked in to the grocery store. All of the refrigerated food had been thrown out for safety. All of the instant food you could pop open a can to eat was sold out, The crackers, cookies cereal aisle were empty. Just bare shelves. Canned vegetables and juices were gone…. Soda gone…. There was plenty of rice flour and beans if you had a way to cook them….there was no bottled water left on the shelves, not a single battery,not a single candle, or charcoal or propane cylinders…. I ended up walking out without buying anything.
Large swathes of the population had their electricity restored after a week, but large areas took up to 3 weeks…. I think it was almost 6 weeks before all damage was restored. It changed my perspective on how I prepare. A storm of the century does not mean it will be a hundred years before you experience similar again.. it means every year there is a 1 percent chance of one occurring. We managed our way through, but we are much better prepared now than we were then…