It is possible to make renewable methanol, convert it into dimethyl ether, and then store/use it in a manner similar to propane:

https://www.aboutdme.org/aboutdme/files/cclibraryfiles/filen...

I could imagine a future where we use heat pumps with propane/rDME backup for power outages or extreme cold weather events, assuming that it won't be profitable to maintain residential natural gas for infrequent use.

There's a number of biofuels that emulate fossil fuels. Ex: Ethanol emulates Gasoline. Synthetic bio-propane seems to be available too.

If we are to be discussing bio-propane vs batteries, the storage benefits are key.

Most of the waste from biofuel production [1] is used as animal feed, so double green!

[1] https://en.wikipedia.org/wiki/Distillers_grains

Ehhh, I'm actually kind of bearish on grains as bio-fuel.

I'd like to see the switchgrass biofuel take off. A surprising amount of emissions in the USA (and Brazil) are due to deforestation associated with turning forests into farmland. That's largely mitigated by using "natural plants", like switchgrass instead of farm crops.

I mean, its all "solar power into fuel", which is great. But its also important to recognize that some (ie: switchgrass based biofuel) are better than others (ex: grain or corn based biofuel).