Founded in 1996 by Wayne E Williams, ISI is one of the few regional companies located in the Midwest that offers developers nationwide the full EPC package for renewable solar energy and Battery Energy Storage System (BESS.) ISI is people. The organization was built and continues to be built with solid character individuals who have demonstrated expertise in their field. Our people and value system come first. Happy team members perpetuate the values that ISI holds dear. We strive for excellence through training and communication.