Solar panels are a great "green" addition to any home. That said, the roof underneath the solar panels is just as important. With an asphalt roof, the homeowner is going to be removing the solar panels to replace the asphalt roof long before the solar (PV) needs to be replaced. This wise choice would be to install a lifetime aluminum energy star rated roof and attachthe PV solar to the new metal roof. When the PV needs to be replaced or removed the roof will still be in service. In fact will last for many years beyond the life of the solar panels. On a different note, if you decide to install solar be sure you have a landing area for the snow slides coming off the panels. It is a little known problem that is just coming to light by the industry. Snow slides coming off a roof with solar can cause significant damage or injury. Be sure to address this issue with your solar contractor.

Get with a local solar company and have them look at your plans.  You may be building a home that cannot work with solar due to your roof pitch, orientation or shade.  Let them give you a site assessment and run the financials based on your available incentives.  You can look them up here:  http://dsireusa.org/