Cal Couillard has been intrigued with solar energy since the 1970s. But, it wasn't until this year that he took the plunge, and had solar panels installed at his Edgerton-based business. He also created a fund to help others "go solar." Solar energy used to be expensive, Coulliard explains, and therefore, only people who wanted to be green jumped aboard. Now, he says, prices have dropped dramatically and it makes sense financially.