| Year | PV Panel Cost/Wp | Unit Cost of Electricity (INR) | Unit Cost of Electricity (INR) | ||
| With Battery | Without Battery | ||||
| Without Subsidy | With 30% Subsidy | Without Subsidy | With 30% Subsidy | ||
| 2007 | 150 | 28 | 19.6 | 17 | 11.9 |
| 2012 | 100 | 22 | 15.4 | 11 | 7.7 |
| 2017 | 60 | 18 | 12.6 | 7 | 4.9 |
| 2022 | 40 | 15 | 10.5 | 4 | 2.8 |