Renewable Energy Savings Calculator
Calculate financial savings and environmental benefits from switching to renewable energy sources.
| Current Energy Source: | |
| Renewable Energy Type: | |
| Current Monthly Energy Usage (kWh): | |
| Current Electricity Rate ($/kWh): | |
| Renewable Energy System Size (kW): | |
| Installation Region: | |
| System Cost After Incentives ($): | |
Renewable Energy Savings Results
Based on your inputs for a Solar PV system:
| Annual Energy Production: | 7,008 kWh |
| Energy Coverage Ratio: | 73% |
| Annual Cost Savings: | $1,051.20 |
| Payback Period: | 11.4 years |
| Annual CO2 Emissions Avoided: | 6,273 kg CO2e |
| 25-Year Lifetime CO2 Savings: | 156,825 kg CO2e |
| Equivalent Trees Planted: | 285 trees per year |
| 25-Year Financial Return: | $14,280 (119% ROI) |
Formulas used in the Renewable Energy Savings Calculator:
• Annual Energy Production: System Size (kW) × 8,760 (hours in year) × Capacity Factor
• Energy Coverage Ratio: (Annual Production ÷ Annual Usage) × 100%
Where Annual Usage = Monthly Usage × 12
• Annual Cost Savings: Annual Production (kWh) × Electricity Rate ($/kWh)
• Payback Period: System Cost ($) ÷ Annual Savings ($/year)
• Annual CO2 Emissions Avoided: Annual Production (kWh) × (Current Source Emissions – Renewable Emissions)
Where emissions are measured in kg CO2e/kWh
• 25-Year Lifetime CO2 Savings: Annual Emissions Avoided × 25 years
• Equivalent Trees Planted: Annual Emissions Avoided (kg CO2e) ÷ 22
Where 22 kg CO2e is the average annual carbon absorption per tree
• 25-Year Financial Return: (Annual Savings × 25) – System Cost
• Return on Investment (ROI): (25-Year Return ÷ System Cost) × 100%
• Adjusted Capacity Factor: Base Regional Capacity Factor × Technology Factor
Where Technology Factor varies by renewable energy type