Question for the community - Base power v/s Tesla Powerwall

Hi Team! I have a question for this group. There are a lot of diverse opinions and folks who have experience with various technologies and providers.

Context: I live in Houston and we've had routine power outages etc over the years. I am really looking at a decently reliable system that gives me power backup without solar. My roof is 13 years old so likely needs to be replaced. after that i will consider getting solar as well.

I am in the process of getting Tesla powerwalls installed. Two PW3's are ~15k after tax credits. I have a cheap locked in plan with free nights which nets me a ~9c /kw energy cost.

The alternate that ive recently been thinking about more and more is the basepower option. They give you a 50kw battery backup for ~1000 + 400/year. Their energy costs are slightly higher at 13.2c/kw but not unreasonable.

So question - is it really worth getting two PW3s for 15k v/s basepower for say 2000 / 3 years and then re-evaluate after that? maybe batteries are cheaper/denser then? im confused and wanted some opinions