I want to help get my mom's house "off the grid." Where do I start?

— Jackie Mellen, Chipley, FL

Answered by Florian Speier on October 3, 2008

I am interested in solar PV. What do you recommend for an old house?

— Exton Quinn, Santa Monica, CA

Answered by Paul Rosen on July 17, 2008

We're buying a house with 25-year-old solar panels. Should we have the system updated?

— Michael and Amy Bergman, Alexandria, VA

Answered by Ricky Cappe on July 3, 2007