How Much Can Solar Save in Windsor?
Real numbers based on current Ameren Illinois rates and Illinois incentives.
$120
Current Bill/mo
$134
Est. Lease + Battery
6.9 yrs
Payback Period
$34,962
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
$120
Annual Cost
$1,440
25-Year Cost (No Solar)
$79,005
Your Solar Investment
6 kW System
$17,400
$9,595
After All IL Incentives
DG Rebate ($300/kW)-$1,800
Illinois Shines RECs (lump sum, ~18 mo)-$6,005
With vs Without Solar in Windsor
| Metric | Without Solar | With Solar |
|---|---|---|
| Monthly Cost | $120/mo | $105/mo (loan) |
| Monthly Cash Flow | -$0 (all to utility) | $-6/mo |
| 5-Year Cost | $7,776 | $6,300 |
| 25-Year Cost | $79,005 | $44,043 |
| 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
$34,962
Without Solar
With Solar
Year 1
$1,440
$1,515
Year 2Payback Year
$2,966
-$2,953
Year 5
$8,117
$1,802
Year 10
$18,980
$10,331
Year 15
$33,517
$19,893
Year 20
$52,971
$30,927
Year 25
$79,005
$44,043
| Year | Without Solar | With Solar | Cumulative Savings |
|---|---|---|---|
| Year 1 | $1,440 | $1,515 | -$75 |
| Year 2Payback | $2,966 | -$2,953 | $5,920 |
| Year 3 | $4,584 | -$1,394 | $5,978 |
| Year 4 | $6,299 | $191 | $6,109 |
| Year 5 | $8,117 | $1,802 | $6,316 |
| Year 6 | $10,044 | $3,441 | $6,603 |
| Year 7 | $12,087 | $5,111 | $6,976 |
| Year 8 | $14,252 | $6,815 | $7,438 |
| Year 9 | $16,547 | $8,554 | $7,994 |
| Year 10 | $18,980 | $10,331 | $8,650 |
| Year 11 | $21,559 | $12,149 | $9,411 |
| Year 12 | $24,293 | $14,010 | $10,282 |
| Year 13 | $27,190 | $15,920 | $11,271 |
| Year 14 | $30,262 | $17,879 | $12,382 |
| Year 15 | $33,517 | $19,893 | $13,624 |
| Year 16 | $36,968 | $21,966 | $15,003 |
| Year 17 | $40,627 | $24,101 | $16,526 |
| Year 18 | $44,504 | $26,303 | $18,202 |
| Year 19 | $48,614 | $28,576 | $20,038 |
| Year 20 | $52,971 | $30,927 | $22,044 |
| Year 21 | $57,590 | $33,360 | $24,229 |
| Year 22 | $62,485 | $35,882 | $26,603 |
| Year 23 | $67,674 | $38,499 | $29,175 |
| Year 24 | $73,174 | $41,217 | $31,958 |
| Year 25 | $79,005 | $44,043 | $34,962 |
Start Saving in Windsor
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Ameren Illinois rates projected to rise again next year. Lock in savings now.