How Much Can Solar Save in Madison?
Real numbers based on current Ameren Illinois rates and Illinois incentives.
$108
Current Bill/mo
$128
Est. Lease + Battery
6.3 yrs
Payback Period
$34,162
25-Year Savings
What You're Paying Now
Without solar, here's what Ameren Illinois electricity will cost you over time at 6% annual rate increases.
Monthly Bill
$108
Annual Cost
$1,296
25-Year Cost (No Solar)
$71,104
Your Solar Investment
5 kW System
$14,500
$7,995
After All IL Incentives
DG Rebate ($300/kW)-$1,500
Illinois Shines RECs (lump sum, ~18 mo)-$5,005
With vs Without Solar in Madison
| Metric | Without Solar | With Solar |
|---|---|---|
| Monthly Cost | $108/mo | $88/mo (loan) |
| Monthly Cash Flow | -$0 (all to utility) | +$3/mo |
| 5-Year Cost | $6,998 | $5,280 |
| 25-Year Cost | $71,104 | $36,942 |
| Rate Control | None — utility sets rates | Fixed at $0.10/kWh (avg.) for 15 years |
| Home Value Impact | None | +$15,000–$25,000 (tax-exempt) |
Your Solar Savings Over Time
Estimated 25-Year Total Savings
$34,162
Without Solar
With Solar
Year 1Payback Year
$1,296
$1,260
Year 5
$7,306
$1,491
Year 10
$17,082
$8,605
Year 15
$30,166
$16,605
Year 20
$47,674
$25,873
Year 25
$71,104
$36,943
| Year | Without Solar | With Solar | Cumulative Savings |
|---|---|---|---|
| Year 1Payback | $1,296 | $1,260 | $36 |
| Year 2 | $2,670 | -$2,467 | $5,137 |
| Year 3 | $4,126 | -$1,169 | $5,295 |
| Year 4 | $5,670 | $150 | $5,520 |
| Year 5 | $7,306 | $1,491 | $5,814 |
| Year 6 | $9,040 | $2,857 | $6,183 |
| Year 7 | $10,878 | $4,249 | $6,629 |
| Year 8 | $12,827 | $5,670 | $7,157 |
| Year 9 | $14,893 | $7,121 | $7,772 |
| Year 10 | $17,082 | $8,605 | $8,478 |
| Year 11 | $19,403 | $10,123 | $9,280 |
| Year 12 | $21,863 | $11,680 | $10,183 |
| Year 13 | $24,471 | $13,277 | $11,194 |
| Year 14 | $27,236 | $14,918 | $12,318 |
| Year 15 | $30,166 | $16,605 | $13,560 |
| Year 16 | $33,272 | $18,343 | $14,929 |
| Year 17 | $36,564 | $20,135 | $16,429 |
| Year 18 | $40,054 | $21,984 | $18,070 |
| Year 19 | $43,753 | $23,895 | $19,857 |
| Year 20 | $47,674 | $25,873 | $21,801 |
| Year 21 | $51,831 | $27,923 | $23,908 |
| Year 22 | $56,236 | $30,049 | $26,188 |
| Year 23 | $60,907 | $32,257 | $28,650 |
| Year 24 | $65,857 | $34,552 | $31,305 |
| Year 25 | $71,104 | $36,943 | $34,162 |
Start Saving in Madison
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Ameren Illinois rates projected to rise again next year. Lock in savings now.