> battery storage in homes batteries can only go in garages.
Batteries in that quantity are something of a fire risk, which is why some jurisdictions mandate they be "outside". Although this is probably just a different kind of over-caution.
And yet home heating oil tanks in basements are completely normal and under little regulation; tanks can and do fail, and if the spill is bad enough, it'll result in the house being "totaled."
The PV industry is saddled with an insane number of regulations designed to make PV installations as expensive and ugly as possible to discourage it. The utilities absolutely hate the idea of becoming a glorified standby network, but they fear people going "huh, I...don't actually need you at all" even more.
That's why when you see a typical PV installation, there's giant orange warning labels all over everything, multiple panels/junction boxes, etc.
It's also why you can meet all the state regulations, but still fail one of the multiple inspections utilities require before you can fully connect the system.
Same reason the utilities are pushing for state laws that automatically condemn a property if there isn't a grid connection.
Batteries in that quantity are something of a fire risk, which is why some jurisdictions mandate they be "outside". Although this is probably just a different kind of over-caution.