LEARN
Reference hub
Every published page on the site, organized three ways: by city (where the diagnostic and cost math live), by utility (where the net-metering and tariff rules live), and by topic (the explainers, buyer guides, and myth-debunks). The research pages are ungated and organized around homeowner questions. Quote help is optional, clearly separated, and disclosed.
CITIES
By city
- Centennial · Arapahoe County
- Aurora · Arapahoe County
- Lakewood · Jefferson County
- Thornton · Adams County
- Arvada · Jefferson County
- Westminster · Adams County
- Boulder · Boulder County
- Greeley · Weld County
- Longmont · Boulder County
- Broomfield · Broomfield County
- Castle Rock · Douglas County
- Commerce City · Adams County
- Parker · Douglas County
- Littleton · Arapahoe County
- Brighton · Adams County
- Northglenn · Adams County
- Wheat Ridge · Jefferson County
- Englewood · Arapahoe County
- Louisville · Boulder County
- Lafayette · Boulder County
- Erie · Boulder County
- Superior · Boulder County
- Golden · Jefferson County
- Federal Heights · Adams County
UTILITIES
By utility
TOPICS
Explainers + buyer guides
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 →