While it's nice to have solar on the roof, you lose (and gain) a lot of heat through your roof from the sun. $1k/yr savings may not offset the extra cost of heating that will be now required. Factories had the same problem when they were required to switch from incandescent light bulbs to CFL. Their heating bill was surprisingly increased.
Additionally, don't solar panels deteriorate over time? So it may be $1.1k savings in the first year, but $1k the next, and so on. Not to mention how the panels are attached to the roofs would be a source of leaks that you as the homeowner now have the pleasure of addressing.