To hedge against increasing electric utility prices, maybe. I installed solar recently and the cost of batteries to cover a decent power outage didn’t make sense to me. I just got a transfer switch and a portable propane generator instead. The battery tech / price is just not there yet IMO. And in case this isn’t well known, when there is a power outage and you don’t have battery backup, the solar generation shuts off — you’re not using solar AS the backup in most cases unless you have a very particular setup.