Bidders do not know what the benchmarks are, as both the benchmark development methodology and the price benchmarks themselves are kept confidential.

The concepts contained in the benchmarks were discussed at a high level at the April 14, 2015 workshop. See: http://www.illinois.gov/ipa/Documents/Supplemental-PV-Workshop-slide-4-14-15.pdf at pages 60-64 for more information.