The best option is definitely a solar generator. We had a 6 day power outage earlier this year and we were able to run the large fridge, run a small microwave, charge phones and laptop and have internet. We had power the entire 6 days! Here is the system that I have: Solar Generator If you just wanted an option to run the microwave and charge phones you could definitely get a smaller system. For indoor heating, Mr Heater Buddy is one of the best ways to go. Completely safe indoor propane heater. They’re only like $85 and you can find them on Amazon or at Walmart.