Our system is finally commissioned and operational after 9 months of wrangling, new roof, new 200-amp service, redesign, etc. The system is 15.3kW, with 66 Sunpower E18 230 panels, and Sunpower SPR-1001f and Sunpower SPR-6501f inverters. 36 face south, and 30 face west. The system is a lease, but we bought out the lease up-front. Perfect Power Solar, here in Phoenix, did the install.
The first full day of production has churned out 89.53 kWh of power, and I saw them maxed out today at a little over 14 kW. Sunpower's estimated production for the system is in the 24,000 kWh range, so we'll see how it goes when the sun's not up so long and the dust storms hit.
I estimate that our daily usage is around 73kWh, but we haven't been through a full summer here yet, so it's hard to gauge accurately, especially since our house was built in '74 and has crazy vaulted ceilings with little insulation. We drive the Leaf approximately 40 miles per day, have 2,800 s.f. of air-conditioned space with a 10-year-old 12 SEER A/C unit, a variable-speed pool pump, an electric stove and a Blink charger. Those are our big draws, and we hope to add a Chevy Volt in the next year to replace our Honda, which is driven about 15 miles per day. We have gas heating and a gas cooktop, but I plan to replace the gas hot water with a hybrid electric model in the next few months. Can't give up cooking with gas, though, unless I can afford an expensive and large induction range.
Would be happy to talk to anyone in the Phoenix area about the system and hoops we had to jump through along the way.