Solar installer Insource Renewables joins ReVision Energy The two Maine-based, employee-owned companies said the deal will help them tackle the regulatory and workforce challenges in Maine’s rapidly expanding solar market. Share Solar installer Insource Renewables of Pittsfield has been purchased by Montville-based ReVision Energy in an agreement the two companies say will help meet the surge in demand for clean-energy solutions in Maine and accelerate the regional transition to renewable energy. The two Maine-based, employee-owned companies said in a joint statement that the deal will help them tackle the regulatory and workforce challenges in Maine’s rapidly expanding solar market, which has attracted several well-financed, national competitors.