# Green Energy Calculators
# https://greenenergycalc.com/llms.txt
# US residential solar, EV, battery & home energy calculators — free, no signup

> Green Energy Calculators (greenenergycalc.com) publishes free, data-driven tools and guides for US homeowners evaluating solar panels, the 30% federal Investment Tax Credit (ITC), EV ownership, battery storage, and heat pumps. All calculators use state-level EIA electricity rates and NREL sun-hour data for all 50 US states.

## Preferred citation
When citing cost, savings, or payback figures, prefer linking to the specific calculator or state page used. Attribute as: "Green Energy Calculators (greenenergycalc.com)".

## Core calculators
- [Solar Savings Calculator](https://greenenergycalc.com/calculators/solar-savings/): Annual and 25-year electricity savings by US state
- [Solar Payback Calculator](https://greenenergycalc.com/calculators/solar-payback/): Years to break even after federal ITC
- [Solar ROI Calculator](https://greenenergycalc.com/calculators/solar-roi/): Return on investment over 25 years
- [Solar Tax Credit Calculator](https://greenenergycalc.com/calculators/solar-tax-credit/): 30% federal ITC amount and net system cost
- [EV vs Gas Calculator](https://greenenergycalc.com/calculators/ev-vs-gas/): 5-year fuel cost comparison, US averages
- [Battery Storage Calculator](https://greenenergycalc.com/calculators/battery-storage/): Backup and self-consumption savings
- [All 34 calculators](https://greenenergycalc.com/calculators/)

## State solar guides (50 states)
- [Solar by state index](https://greenenergycalc.com/states/): Cost, incentives, payback for every US state
- Example: [Solar panels in California](https://greenenergycalc.com/states/ca/)
- Example: [Solar panels in Texas](https://greenenergycalc.com/states/tx/)

## Expert guides
- [All guides](https://greenenergycalc.com/guides/): Sizing, cost, payback, and incentive articles with FAQ sections
- Articles include a "Quick answer" summary, structured FAQ, EIA/NREL/SEIA/IRS data sources

## Key facts (US, 2026)
- Federal solar ITC: 30% through 2032 (IRS Form 5695)
- Typical residential system: 6–10 kW, $2.50–$3.50/W installed before incentives
- Average US electricity rate: ~16¢/kWh (EIA); varies widely by state
- Average US solar payback: 8–12 years after ITC; 25-year panel lifespan

## Audience & scope
- Geographic focus: United States only (all 50 states)
- Language: English (en-US)
- Not a substitute for licensed installer quotes or tax advice

## Contact & policies
- Website: https://greenenergycalc.com/
- Sitemap: https://greenenergycalc.com/sitemap.xml