Depending on your definition of long term… I’ve got ~900lbs of propane tanks sitting beside my house, a propane forced air furnace, and a dual fuel generator that can run on propane.

Assuming I run the generator for 12 hours a day at half load (powering my whole house, still firing my equipment up and working remotely…) and the furnace runs for three hours a day throughout that time… I can keep going for a couple of weeks. If I _can_ get gas to fuel the generator with that can be extended pretty substantially—the generator is really what’s using up all my propane.

So in the realm of the kind of power outages where you reasonably expect society to recover and continue… works pretty well for me.

But yeah, in the future I would love to move over to a heat pump and solar generation / local storage. That extends your potential runtime pretty near indefinitely. (We’re talking lifetime of batteries and solar panels at that point instead of “when the propane truck can come by next”.)