Batteries? Huh?
Solar City and leasing panels is not the best way to go.. for some its an only option, but the leasing company makes a fortune while you save about $25 a month, and you lease based on 100% of the solar cost. NO rebates after spending 3 times (or much more) the cost of the panels over the 20 year lease.
We found our only viable option was to buy the panels outright.. giving us 30% cash back at the end of the year.
Our break even is 8 years, and we've had negative electric nills all summer (installed in December)
Leases and "no money down" and Solar Programs for Veterans .. make the solar companies a LOT of money and none of that profit is passed to you.