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On The Mark: Bright power bill days ahead

After thinking about it for months, my husband, Rod, and I decided to install solar power at our home. Rod researched the options. We chose to go with a small company, Wolf Track Energy of Duluth, recommended by Jeff Corey of One Roof Community Housing. We decided against putting the panels on our roof, concerned about potential damage. We opted instead to install them in the yard south of our home.

More than a decade ago, we installed ground source heating and cooling, using an extensive system of pipes laid some 9 feet underground, shuttling water to and from a heat exchanger in the basement...