How Much Can Solar Save in O'Fallon?
Real numbers based on current Ameren Illinois rates and Illinois incentives.
$166
Current Bill/mo
$161
Est. Lease + Battery
6.5 yrs
Payback Period
$52,165
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
$166
Annual Cost
$1,992
25-Year Cost (No Solar)
$109,290
Your Solar Investment
8 kW System
$23,200
$12,793
After All IL Incentives
DG Rebate ($300/kW)-$2,400
Illinois Shines RECs (lump sum, ~18 mo)-$8,007
With vs Without Solar in O'Fallon
| Metric | Without Solar | With Solar |
|---|---|---|
| Monthly Cost | $166/mo | $140/mo (loan) |
| Monthly Cash Flow | -$0 (all to utility) | +$1/mo |
| 5-Year Cost | $10,757 | $8,400 |
| 25-Year Cost | $109,290 | $57,125 |
| 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
$52,165
Without Solar
With Solar
Year 1Payback Year
$1,992
$1,983
Year 5
$11,229
$2,200
Year 10
$26,256
$13,322
Year 15
$46,366
$25,764
Year 20
$73,277
$40,098
Year 25
$109,290
$57,125
| Year | Without Solar | With Solar | Cumulative Savings |
|---|---|---|---|
| Year 1Payback | $1,992 | $1,983 | $9 |
| Year 2 | $4,104 | -$4,014 | $8,117 |
| Year 3 | $6,342 | -$1,974 | $8,316 |
| Year 4 | $8,714 | $96 | $8,618 |
| Year 5 | $11,229 | $2,200 | $9,029 |
| Year 6 | $13,895 | $4,340 | $9,555 |
| Year 7 | $16,721 | $6,519 | $10,201 |
| Year 8 | $19,716 | $8,741 | $10,975 |
| Year 9 | $22,891 | $11,007 | $11,884 |
| Year 10 | $26,256 | $13,322 | $12,934 |
| Year 11 | $29,824 | $15,689 | $14,134 |
| Year 12 | $33,605 | $18,113 | $15,492 |
| Year 13 | $37,613 | $20,597 | $17,016 |
| Year 14 | $41,862 | $23,146 | $18,716 |
| Year 15 | $46,366 | $25,764 | $20,601 |
| Year 16 | $51,140 | $28,458 | $22,682 |
| Year 17 | $56,200 | $31,232 | $24,968 |
| Year 18 | $61,564 | $34,092 | $27,472 |
| Year 19 | $67,250 | $37,045 | $30,205 |
| Year 20 | $73,277 | $40,098 | $33,179 |
| Year 21 | $79,666 | $43,257 | $36,409 |
| Year 22 | $86,437 | $46,531 | $39,907 |
| Year 23 | $93,616 | $49,927 | $43,688 |
| Year 24 | $101,225 | $53,455 | $47,769 |
| Year 25 | $109,290 | $57,125 | $52,165 |
Start Saving in O'Fallon
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