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Return on investment for renewable energy projects compares installation cost to energy savings and incentive values over system lifetime.
공식
Calculate: ROI = (annual savings × years - installation cost) / installation cost × 100%
- ROI
- (annual savings × years - installation cost) / installation cost × 100% — (annual savings × years - installation cost) / installation cost × 100%
단계별 가이드
- 1Calculate: ROI = (annual savings × years - installation cost) / installation cost × 100%
- 2Include tax credits (often 30%), net metering credits, maintenance costs
- 3Typical payback: solar 6-10 years, wind 6-8 years
풀어진 예시
입력
Solar install $10,000, annual savings $2,000, tax credit $3,000, 25-year life
결과
ROI ~450%, payback 5 years
Excellent investment
피해야 할 일반적인 실수
- ✕Forgetting tax incentives in calculations
- ✕Not accounting for inflation in long-term projections
자주 묻는 질문
Should renewable energy investments be evaluated like other investments?
Yes, though non-financial benefits (emissions, independence) matter too.
How do incentives affect ROI?
Dramatically; 30% federal credit cuts payback from 8 to 5 years, making projects viable.
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