Solar panels are so good and cheap now, I’m not sure the costs really get in the way anymore.
The barrier is more just know-how and regulatory.
Regulatory comes into play when you want to connect to the grid or try disconnecting from it (not allowed in Cali)
One can do pretty much whatever you want if you never intend to connect with it.
I was hard 20 years ago when I started playing with it. The new stuff can be installed and managed by total amatuers that are handy and careful.
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