Let me repeat what I said in case you did not read it correctly:
"Yes, battery backup technology does exist, but it is not deployed in the typical solar panel installation. "
I used to live in a planned community where every house has solar installed by the builder. The builder's name is Lennar - http://new-homes.lennar.com/newhomes/
None of the homes used battery backup because it was too expensive to provide a useful amount of Ampere hours of power.
My statement was clear.
Isn't it great that LePage is offering the public to vote for a $100 Million tax cut?