Okay - thinking about adding solar to my house. So please pardon my n00b questions. 1. When solarcity etc. gives you a price quote - is that solar cells only, or solar + battery? 2. Do you usually add battery? What percentage cost does that add, what kind of battery do you get? 3. My electricity rate is $0.12/kwh - not bad huh? Would you say solar makes sense (financially). TIA!