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Energy Efficiency ROI Calculator
Calculate ROI, payback periods, and lifetime savings for LED retrofits, solar preparation, and EV charger installations.
Quick Presets
Typical 2,000 sq ft Home LED Upgrade
25 fixtures, 60W incandescent → 9W LED
Small Commercial LED Retrofit
50 fixtures, 32W fluorescent → 18W LED
Level 2 EV Charger + Solar Prep
240V circuit, panel upgrade, EV outlet
Solar-Ready Electrical Upgrade
Panel upgrade, meter disconnect, EV prep
Calculator Type
Texas Utility
✓ Rebate programs available
LED Retrofit Inputs
Number of Fixtures
Hours per Day
Current Wattage (each)
LED Wattage (each)
Project Cost
Utility Rebates
kWh Rate ($/kWh)
Expected Lifespan (years)
Cumulative Savings Over Time
$3259
$0
$-389
Payback: 2.5yr
Year 1
Year 20
ROI Analysis
Payback Period
2.5 years
Annual Energy Savings
2327 kWh
$260.61/year
5-Year ROI
100.5%
10-Year ROI
300.9%
Lifetime Savings
$3259.15
Over 15 years
Copy Results
Environmental Impact
Annual CO₂ Reduction:
931 lbs
Equivalent Trees Planted:
19 trees
Based on EPA's 0.4 lbs CO₂/kWh and 48 lbs CO₂/tree/year
Project Summary
Initial Investment:
$750.00
Utility Rebates:
-$100.00
Net Cost:
$650.00
✓ Project pays for itself in 2.5 years