34 free calculators · Updated for 2026

Know exactly how much
you'll save with solar

Instant, unbiased calculators for solar panels, EVs, battery storage and home energy. Real data for all 50 US states — no signup, no sales pitch.

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Quick estimate · National average
System cost (8 kW)$24,000
After 30% federal ITC$16,800
Annual electricity savings$1,540/yr
Payback period10.9 yrs
25-year net profit$21,700
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34
Free calculators
50
US states covered
30%
Federal ITC 2026
$25k+
Avg 25-yr savings
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2026 federal ITC included
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Why Green Energy Calculators

Straight answers.
No sales pitch.

Every other solar calculator we found was built to collect your phone number for an installer. We built these because real homeowners making real financial decisions deserve accurate tools — not lead generation funnels.

  • Uses EIA electricity rate data and NREL sun hour data for every US state
  • Includes 2026 federal 30% ITC and all major state incentives
  • Results update instantly as you adjust any input — no page reloads
  • Zero ads that track you, zero data sold, zero signup required
  • Methodology is transparent — every formula is documented
About our methodology →
Data sourced from
EIA
U.S. Energy Information Administration
NREL
National Renewable Energy Laboratory
IRS
IRS Publication 5695 — ITC guidelines
SEIA
Solar Energy Industries Association
DSIRE
Database of State Incentives for Renewables

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