Are there different types of EcoLogo power?
There are three different types of EcoLogo power, known as Type I, Type II and Type III. The distinction between types is based on age of the facilities. Low-impact renewable generation facilities built prior to 1990 are eligible to be certified as Type I. Facilities commissioned between 1991 and 2001 are eligible to be certified as Type II, and facilities commissioned after 2001are eligible to be certified as Type III. The criteria for EcoLogo certification are available here.