Skylights

Energy savings can be one reason why people consider adding skylights to homes or are attracted to homes with them already installed. Along with additional light provided they can give energy savings up to 15% when coupled with efficient windows and doors and improved ventilation. They are a significant risk of moisture entry and leaks however and are a starting point for inspection of attics and roofs especially if they pre date 1995.
 
My humble opinion: Skylights are the same as basements there are 2 types, those that are leaking and those that will at some point in the future.
 
Solar panels can provide electrical savings or simpler systems can be water heating systems and are receiving more general acceptance across Canada  and can result in savings of 50 - 80% of water heating costs for installation investments from $6 - 12k
 
Tax rebates are still available for the installation of approved units