I just finished looking into the feasibility of solar power for our church's overpriced electricity and, to my dismay, found out that the financial case wasn't there despite all the hype that has been given to going solar. I went on to look at the possibility that solar had become affordable enough to put on my own roof and, even with all the government incentives, it wasn't going to pay off.
I would still encourage anyone interested in living in their home for a decade or more to look into the possibility. A good time to install panels is right after you roof. A sunny location is a must (my limitation is shade from trees, though that could change as I replace forest with forest gardens). In Maryland's ever more humid climate, you may be able to save the most by using Cadmium-Tellurium panels made by First Solar.
Rather than immediately consult with a solar installer, you can see for yourself using a tool similar to what they might use to find out whether your situation favors the investment. SMECO also provides many useful tips to help you in the decision and the process.
You aren't going to save the planet by going solar, but your life could be much more bearable in the fossil fuel limited future when power rationing could be the order of the day.
