Our electrical grid is archaic.
The technology of our grid is over a century old.
There is no current technology when we are talking about our electrical grid.
Stuff that was thought up in the 50's, and written about in the 70's still isn't used.
We don't even have Tesla Coil lighting? Completely make mercury filled fluorescent lighting as one the stupidest ideas man has made up to kill himself. With the mosfet, they could be mass produced, saving energy and making lighting so much better. Well, now we have LEDs, but still, 100 years, and no one made them to market.
The thing you really need in the power outage is something to run the freezer. A small generator is a good way to go. Just run it a couple times per day, as long as you aren't opening it.
And then I could go on to why haven't we switched to 400 Hz electricity yet? It saves so much in transmission costs and transformer sizes. Sigh.
Keep preparing to be comfortable when the lights go out.
What do you want to know about electricity?
To me, this is... imagine reading books written in the 70s that should have been implemented back in the 50s but haven't. The shit exists, people do it all the time, but usually only single engineers that know how to make it work and keep it going. Like wood powered vehicles (methanol). Coal batteries and other shit.
So, what is it you want to know. Where does one need to start?
And if, what you want to know is what is electricity, I have to start with, everything you know is wrong. Which really gets all the pseudo-scientific types' panties in a bind.
The best way is to buy a small gasoline generator.
And then you buy 12 gas cans. Label them Jan-Dec. Each month, you pour one of the cans into your car's gas tank, and go get it refilled. Thus, you are continually recycling your storage. (Gasoline separates and becomes gum and volatiles; not good for engines)
Then, when the lights go out, you have 12 cans of gas to use on your little generator. Should get you through almost anything.
Another way to go is buy a propane powered generator. But they are much rare in the states. Propane doesn't degrade like gasoline, so you can just store several cannisters for when you need them. Also good for cooking and such.
Solar power, you start with whatever panels you can afford. Then a small charger and a battery. Then you buy a little inverter, and run shit off it.
Then, you just make the whole system bigger.