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Both calculators run independently — change the inputs on either side to compare results.

Renewable Energy Investment ROI Calculator

Estimate the 25-year return on investment for solar, wind, or geothermal installations. Use it when comparing system sizes, incentive packages, or electricity rate scenarios before committing to a renewable energy project.

System Capacity (kW)

Total Installation Cost ($)

Tax Credits & Rebates ($)

Current Electricity Rate ($/kWh)

Annual Rate Increase (%)

Fill in the required fields to see your result.

Climate

Energy Efficiency Upgrade ROI Calculator

Estimate how quickly your energy efficiency upgrade pays for itself. Enter your current energy bill, upgrade cost, rebates, and energy inflation to get a projected ROI over your chosen analysis period.

Current Monthly Energy Bill ($)

Upgrade Category

Total Upgrade Cost ($)

Utility Rebates ($)

Annual Energy Cost Increase (%)

Analysis Period (years)

Fill in the required fields to see your result.

Key differences

	Renewable Energy Investment ROI Calculator	Energy Efficiency Upgrade ROI Calculator
Category	Climate	Climate
Inputs required	5	6
Result	25-Year ROI Percentage (%)	Simple Payback Period (years)
What it does	Estimate the 25-year return on investment for solar, wind, or geothermal installations. Use it when comparing system sizes, incentive packages, or electricity rate scenarios before committing to a renewable energy project.	Estimate how quickly your energy efficiency upgrade pays for itself. Enter your current energy bill, upgrade cost, rebates, and energy inflation to get a projected ROI over your chosen analysis period.