About solar.day

solar.day is an honest, AI-powered check for whether solar panels and a battery are right for your specific home. Three minutes, no login, no pitch. We look at your roof from Google's satellite data, ask you a few questions about how you live, and tell you straight, even if the answer is no.

solar.day is one of four consumer tools built for Green But Not Heard, a book that argues the energy transition is stalled by marketing, not technology. The book launches in September 2026.

This is the start. The full launch in September adds:

• Real Google satellite analysis of your specific roof
• Solar Shadow, a continuous digital twin that emails you weekly with what your system would have generated and saved
• A check for people who've inherited solar in a house they bought
• A battery-only assessment with time-of-use tariff recommendations
• A critique tool for installer quotes
• An AI coach to walk you through the numbers

solar.day is independent. We're not paid by installers, panel manufacturers, or energy companies. If the answer is no, we'll say so. If a battery alone is the smarter move, we'll point you there. No greenwash. No sales pitch. Just clarity.