Contact
Last updated 18 September 2026
Email is the only channel, and it is read.
What gets a fast reply
- Data corrections. If a figure looks wrong, send the page URL and what you believe the correct value is. These are handled first.
- Missing coverage. Tell me which state, utility or calculator you were looking for and could not find.
- Press and research. The data on this site may be cited freely with a link.
What does not
I cannot advise on your specific bill, dispute a charge with your utility, or recommend a supplier or installer. For a billing dispute, contact your state's public utility commission, which handles exactly these complaints and can act where I cannot.
Typical response time is two to three business days.