Energy Savings Calculator
Calculate monthly and annual dollar savings, percentage energy reduction, and payback periods from upgrading to energy-efficient appliances, LEDs, or heat pumps.
Existing vs Energy-Efficient Replacement
Energy Reduction & Payback Formula
Monthly Savings = [(Baseline kWh - New kWh) × Rate] | Payback Period (Months) = Equipment Upgrade Cost ÷ Monthly Savings- Baseline Consumption: Existing electrical power or monthly kWh draw of old, inefficient equipment.
- New Efficient Consumption: Power rating of new Energy Star appliance, LED fixture, or inverter heat pump.
- Payback Period: Months of operational bill savings needed to fully recover the upfront equipment purchase price.
Step-by-Step Worked Example
Calculation Steps:
How to Use This Calculator
Assumptions & Limitations
- Savings are operational estimates and assume identical duty hours before and after upgrade.
- Does not include utility energy efficiency rebate checks which shorten payback further.
Frequently Asked Questions
What is the fastest energy efficiency upgrade to pay for itself?
Replacing incandescent and halogen light bulbs with LEDs has the fastest payback of any home energy upgrade, typically paying for itself in 1 to 3 months while lasting 10 to 15 years.
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