Blog · ROI Analysis
Solar Panel ROI: Complete Return on Investment Guide 2026
Calculate solar panel returns, payback period, 25-year savings. Real ROI examples by system size.
Understanding Solar Panel ROI
Solar panel ROI is the total return you earn over the system's 25+ year lifespan compared to your initial investment. With subsidy, typical payback is 4-6 years, after which you enjoy free electricity for 20+ years.
5kW Solar System ROI Example (Tamil Nadu)
System Cost (Before Subsidy)
₹3,00,000
MNRE Subsidy
-₹78,000
Net Investment
₹2,22,000
Monthly Savings
₹4,500
Payback Period
4.1 years
25-Year Total Savings
₹13,50,000
After deducting initial investment
ROI by System Size
| Size | Investment | Payback | 25-Yr Savings |
|---|---|---|---|
| 3kW | ₹1.4L | 4.2 yrs | ₹8.1L |
| 5kW | ₹2.2L | 4.1 yrs | ₹13.5L |
| 10kW | ₹4.5L | 5 yrs | ₹27L |