Larimer landlord sees solar energy as way to cut costs for tenants Share this post GTECH landlord Craig Marcus explains the effects of installing an array of 54 solar panels on the roof of the building and 52 panels on a shed behind it. The array is expected to pay for themselves in five to six years. Then, Mr. Marcus will be able to sell excess energy back to the power company while his tenants, GTECH Strategies and Grow Pittsburgh, get 70 percent of their electrical needs supplied by solar.