How Much Can Solar Save in Williamsville?
Real numbers based on current Ameren Illinois rates and Illinois incentives.
$144
Current Bill/mo
$150
Est. Lease + Battery
6.5 yrs
Payback Period
$45,919
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
$144
Annual Cost
$1,728
25-Year Cost (No Solar)
$94,806
Your Solar Investment
7 kW System
$20,300
$11,194
After All IL Incentives
DG Rebate ($300/kW)-$2,100
Illinois Shines RECs (lump sum, ~18 mo)-$7,006
With vs Without Solar in Williamsville
| Metric | Without Solar | With Solar |
|---|---|---|
| Monthly Cost | $144/mo | $123/mo (loan) |
| Monthly Cash Flow | -$0 (all to utility) | +$1/mo |
| 5-Year Cost | $9,331 | $7,380 |
| 25-Year Cost | $94,806 | $48,887 |
| 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
$45,919
Without Solar
With Solar
Year 1Payback Year
$1,728
$1,715
Year 5
$9,741
$1,810
Year 10
$22,776
$11,390
Year 15
$40,221
$22,074
Year 20
$63,566
$34,347
Year 25
$94,806
$48,887
| Year | Without Solar | With Solar | Cumulative Savings |
|---|---|---|---|
| Year 1Payback | $1,728 | $1,715 | $13 |
| Year 2 | $3,560 | -$3,554 | $7,113 |
| Year 3 | $5,501 | -$1,792 | $7,294 |
| Year 4 | $7,559 | -$5 | $7,564 |
| Year 5 | $9,741 | $1,810 | $7,930 |
| Year 6 | $12,053 | $3,656 | $8,397 |
| Year 7 | $14,505 | $5,534 | $8,970 |
| Year 8 | $17,103 | $7,447 | $9,655 |
| Year 9 | $19,857 | $9,398 | $10,459 |
| Year 10 | $22,776 | $11,390 | $11,386 |
| Year 11 | $25,871 | $13,425 | $12,446 |
| Year 12 | $29,151 | $15,508 | $13,644 |
| Year 13 | $32,628 | $17,641 | $14,988 |
| Year 14 | $36,314 | $19,828 | $16,486 |
| Year 15 | $40,221 | $22,074 | $18,147 |
| Year 16 | $44,362 | $24,383 | $19,979 |
| Year 17 | $48,752 | $26,760 | $21,992 |
| Year 18 | $53,405 | $29,209 | $24,196 |
| Year 19 | $58,337 | $31,736 | $26,601 |
| Year 20 | $63,566 | $34,347 | $29,219 |
| Year 21 | $69,107 | $37,047 | $32,060 |
| Year 22 | $74,982 | $39,844 | $35,138 |
| Year 23 | $81,209 | $42,745 | $38,464 |
| Year 24 | $87,809 | $45,756 | $42,053 |
| Year 25 | $94,806 | $48,887 | $45,919 |
Start Saving in Williamsville
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