| Assumed Life | Net Present Value of avoided SCE costs at discount rate = | IRR | ||
| 3.0% | 6.0% | 9.0% | ||
| 20 years | $18,669.74 | $14,393.60 | $11,455.41 | 12.51% |
| 25 years | $21,851.76 | $16,041.83 | $12,326.36 | 13.19% |
| 30 years | $24,596.59 | $17,273.49 | $12,892.41 | 13.51% |