All professional installers I've seen do not provide for power storage. Only a system that compliments the grid and doesn't run without it. Batteries are somewhat dangerous and there are numerous code issues for installing inside your home. The only legal way to have indoor batteries would be UL-listed UPS systems but they cost a fortune.
Putting together a battery bank from marine batteries is not complicated and reasonably priced. I would recommend an outdoor enclosure and completely independent wiring from your home (basically outdoor extension cords that you'd plug into the batteries only when needed).
That way you avoid code and permit issues. Don't go cheap on the charge controller or inverter since mischarging batteries can result in explosion.
Also, some jurisdictions may require permits for anything electrical attached to your home. This includes low voltage panels/wiring on the roof. You can avoid that with free-standing panels.
“Putting together a battery bank from marine batteries is not complicated and reasonably priced. I would recommend an outdoor enclosure and completely independent wiring from your home (basically outdoor extension cords that you’d plug into the batteries only when needed).”
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With fairly heavy usage how long would batteries last? Two, three years?
Here’s a portable solar system that would keep a small fridge working and maybe run a ‘nuwave’ hotplate... Everyone’s going to need redundant systems because when something breaks we won’t be able to replace it.
What do you think?