What I do everyday is boil water and when we had our last electrical power outage the water boiled faster because I used a counter-top butane stove (many available on Amazon) instead of the electric stovetop. Most any camping stove will work.

Making coffee is easy if you can make a fire and if you aren't reliant on a drip coffee maker. Check out the Melitta 6-Cup Pour-Over Coffeemaker -- totally manual, no moving parts. Boil the water by any method and pour over the grounds. Super easy and no, I don't have any other affiliation with Melitta.

Or even easier, you can skip the cone filter & carafe angle and pour the water you just boiled into a cup with Folgers Coffee Singles, Starbucks Via (my preference in instant coffee) or any other instant coffee.