I will be looking at some sort of an outside wood boiler/gasification heating system before next winter. The main problem I have with them is what happens in the event of a power outage(we seem to have them fairly frequently in the dead of winter). The boiler will be situated at a place where there will be good southern exposure and I'm thinking that a small solar panel to power the boiler's electrical needs may be the "green" answer and may be a solar set up I can actually afford. Where do I start looking for resources into something like this for our central PA. homestead? Can the solar array be set up to have the main electrical grid as a back up in the event of equipment failure or lack of sun?