I did a quick calculation on what it would take to take my entire home solar. There are several 'solar calculators on the 'net. $50,000 is a conservative estimate. The govt credit for such an endevour? $2,000.
WRONG: Fed tax credit is 30% of the total installed price of a solar energy system. Many states have additional incentives ranging from sales tax exemption to production credits to system credits! In addition, why such an energy hog house? Reduce your kWh load and you reduce the size of the required system. Yy 3000 sf house (in Seattle no less) uses an annual average of about 16kWh of electricity per day (pre LEAF). To power that requires about a 4kW system in our rainy part of the world. So even if it took 2 of the Ford/Sunpower systems to get a 5kW system, we're talking $20k - 30% = $14,000. Reduced sales tax here (75% tax free), and power production credits would offset every kWh produced.
$10k for a 2.5kW system (if that's installed price) is a great price. I've had solar on my house since '85 and prices have never been lower, the quality has never been higher (panels & inverters), and the choices never so great. Solar energy systems will work for decades and powering your LEAF with solar is a great thing you can do.
However, if you're in Seattle where City Light's energy production is already about 95% from renewables, the impact of having your own PV system (if bought to reduce GH gasses) is minimal. In coal country, PLEASE do consider a PV system to offset or cover the charging of your car.
Seems like there's just as much misinformation and lack of knowledge about solar as there is about EV's. The EV community is the perfect group to combine the benefits of home power generation and clean driving. Not only can you stop the $ flowing to the middle east to power your car, you can take concrete steps towards your own energy independence from the utilities as well.
GO SOLAR!
PS: I've had solar on my home since 1985