Ninety solar-powered homes and buildings across the state will be open for public tours on Saturday, October 6th, from 10 AM to 3 PM. The Illinois Solar Energy Association is sponsoring the event. The group has prepared a 28-page tour guidebook that you can purchase online or pick up for free at tour sponsor locations. The Central Illinois area has seven tour sites, including homes in Williamsville and Jacksonville. This will be a great opportunity to see solar energy at work in Illinois.