Our mission
Data Transparency for
Every Energy Decision
Understand the assumptions before comparing energy upgrades. We built Clean Energy Calculator so homeowners can see the real math — before they ever sign a contract.
Why We Built This
When homeowners research solar, EVs, or heat pumps, the first results they encounter are almost always from companies with a direct financial stake in the answer. Installer quote forms, leasing promotions, and dealer inventory pages dominate search results — not independent analysis.
We set out to build something different: free planning calculators using public references, equipment specifications, and explicit assumptions. No lead-generation forms hidden behind results. No inflated savings estimates designed to close a sale.
Our tools are used by homeowners, energy consultants, financial advisors, and journalists who need a neutral second opinion before making a five-figure clean energy decision.
- No sign-up required — every calculator is free, forever.
- No hidden data — methodology notes explain every formula.
- Compare independently — take your estimate to installers and request itemized quotes.
- Dated inputs — the methodology identifies the electricity data period separately from source review dates.
- No conflicting incentives — affiliate relationships are disclosed inline.
Our Data Sources
Our calculators combine public data with editable planning assumptions and equipment specifications. These are reference sources, not endorsements of our results.
Residential electricity-rate references. Our stored table uses a dated release; EIA publication dates and our review dates are distinct.
Visit sourceFederal incentive frameworks, EV battery performance research, home efficiency standards, and Inflation Reduction Act guidance.
Visit sourceSolar irradiance maps, PVWatts energy production models, peak sun-hour data for all 50 states, and grid-edge technology research.
Visit sourceComprehensive, up-to-date state-level tax credits, rebates, and net metering policies for all 50 states + DC.
Visit sourceA Note on Affiliate Links
Some pages include recommended products (solar inverters, EV chargers, heat pumps) with affiliate links. When you click and purchase, we may earn a small commission at no extra cost to you. This revenue keeps the calculators free. All affiliate relationships are disclosed inline, next to each recommendation. They never influence our calculator outputs or data sources.
Who's Behind This
Independent tools are only as trustworthy as the people who stand behind them. Here's who builds and reviews CleanEnergyCalc.
Jiseok Lee
Founder & Editor
Jiseok builds and maintains CleanEnergyCalc. Calculator pages identify their data sources, assumptions, and review dates so readers can check the estimates.
Connect on LinkedInQuestions or Corrections?
Found a data error? Spot an outdated rate? We review every correction request. Reach out via our contact page and we'll respond within 48 hours.
Stored electricity-rate defaults use EIA June 2026 residential averages. Solar estimates use simplified annual-average resource assumptions. Replace these defaults with your bills and site-specific estimates; results depend on local conditions and your utility tariff.