Since we purchased the Chevy Volt last year, it has been clear that I will need to add more solar panels to make up for the extra energy required to charge it (around 13 kWh per day).
Last year I added three panels to the west facing array which now totals 5.1 kW. This leaves no more space on that roof. The only remaining surface on the building that is exposed to the sun is the south wall above the collectors, so I intend to put two more panels on each side of the window angled out at about 25°. Here is a Google SketchUp model showing the proposed location for these two new panels:
In keeping with my desire to install only American-made hardware, I have purchased two Solar World 245W panels, and two Enphase M215 inverters from altE. Rather than pay the very expensive truck freight to have this hardware delivered, I will be driving down to Marlborough, MA (a 2.5 hour Drive) to pick them up from the altE warehouse. After measuring very carefully I have determined that the 2 solar panels should barely fit inside the Chevy Volt which is fitting since the panels will be providing power to charge it.
I hope to mount them as soon as the snow clears off the roof, and the weather is amenable for outdoor work on ladders.