Eldritch
is insensitive
Regarding solar, if you want to go a little cheaper skip getting the battery backup. We installed solar 3 years ago after paying $500-$600/mo PG&E bills in the summer and our electric bill has dropped to almost nothing each month.
I was a Nazi about turning off lights and not running the AC so much. Now I don't care, what a relief.
We still want to get a storage battery but they aren't cheap and something always comes up that's more important.
Battery will maximize the effectiveness of your system, allowing you to potentially use less panels to save money if that is your interest. The additional benefits are around resiliency, as a battery system set up correctly, will allow you to operate your building in a PSPS or similar blackout event, but you must ensure the design instructions are clear to set it up that way. Local utilities prefer you do not have that ability and will push for an installation of batteries on the other side of the switch.