Just buy 2 steam powered generators that can burn coal. If you are really concerned. You can always find something to burn. Get two that way when one breaks you can use the other.
I stopped prepping long ago. I was freaked out by a pandemic way before 2020 and all my supplies were exhausted within a month. The only real way to prepare for the end of civilization and still have civilization is to have an entire backup civilization. Which none of us have the resources to do.