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Reference hub

Every published page on the site, organized by city, utility, and topic. The research pages are ungated and organized around homeowner questions.

Cities

By city

All Illinois cities →

Methodology

How we research

Numbers on the site trace to NREL PVWatts, DSIRE, the Illinois Commerce Commission tariff record, EIA-861, and the Illinois Shines program filings, listed in the source bar at the top of each policy page. The full editorial policy, what gets cited, what gets refused, and how often each page is re-verified, lives on the methodology page.

Read the full methodology →