You could unplug Mr.Microwave till Mr. Coffee is done?
Now now, let's not over-complicate things.
Or- or, you could get a secondary generator, dubbed, Mr.Coffee! This way, even during a power outage, you can always be within a few minutes of drinking a nice fresh cup of coffee. In fact I'd recommend getting a back-up to this secondary generator, just in case there's a huge snowstorm, the power goes out for 2 weeks and the secondary dies. just flip on the tertiary and your good to go for another 2 weeks.
Hmm, but then there's the issue of what to do after 4 weeks. You surely cannot go without coffee! Well, assuming you don't have quaternary and pentenary generators,( and what self-respecting coffee drinker doesn't?), you can always have a mega-backup generator that runs on pedal power. just pedal for a few minutes and a nice even cadence and you can have a fresh pot of coffee. Of course you'll need to keep pedalling to keep it warm but it's a workable solution.