How Much Can Solar Save in O'Fallon?
Real numbers based on current Ameren Illinois rates and Illinois incentives.
$135
Current Bill/mo
$151
Est. Lease + Battery
7.6 yrs
Payback Period
$35,056
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
$135
Annual Cost
$1,620
25-Year Cost (No Solar)
$88,881
Your Solar Investment
7.5 kW System
$21,750
$11,993
After All IL Incentives
DG Rebate ($300/kW)-$2,250
Illinois Shines RECs (lump sum, ~18 mo)-$7,507
With vs Without Solar in O'Fallon
| Metric | Without Solar | With Solar |
|---|---|---|
| Monthly Cost | $135/mo | $132/mo (loan) |
| Monthly Cash Flow | -$0 (all to utility) | $-22/mo |
| 5-Year Cost | $8,748 | $7,920 |
| 25-Year Cost | $88,881 | $53,825 |
| 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
$35,056
Without Solar
With Solar
Year 1
$1,620
$1,884
Year 2Payback Year
$3,337
-$3,714
Year 5
$9,132
$2,183
Year 10
$21,353
$12,722
Year 15
$37,707
$24,471
Year 20
$59,593
$37,936
Year 25
$88,881
$53,824
| Year | Without Solar | With Solar | Cumulative Savings |
|---|---|---|---|
| Year 1 | $1,620 | $1,884 | -$264 |
| Year 2Payback | $3,337 | -$3,714 | $7,052 |
| Year 3 | $5,157 | -$1,778 | $6,936 |
| Year 4 | $7,087 | $187 | $6,900 |
| Year 5 | $9,132 | $2,183 | $6,949 |
| Year 6 | $11,300 | $4,213 | $7,087 |
| Year 7 | $13,598 | $6,280 | $7,318 |
| Year 8 | $16,034 | $8,385 | $7,649 |
| Year 9 | $18,616 | $10,531 | $8,085 |
| Year 10 | $21,353 | $12,722 | $8,631 |
| Year 11 | $24,254 | $14,962 | $9,293 |
| Year 12 | $27,329 | $17,252 | $10,077 |
| Year 13 | $30,589 | $19,598 | $10,991 |
| Year 14 | $34,044 | $22,003 | $12,041 |
| Year 15 | $37,707 | $24,471 | $13,236 |
| Year 16 | $41,589 | $27,008 | $14,582 |
| Year 17 | $45,705 | $29,617 | $16,088 |
| Year 18 | $50,067 | $32,305 | $17,763 |
| Year 19 | $54,691 | $35,076 | $19,616 |
| Year 20 | $59,593 | $37,936 | $21,656 |
| Year 21 | $64,788 | $40,893 | $23,895 |
| Year 22 | $70,296 | $43,953 | $26,343 |
| Year 23 | $76,133 | $47,123 | $29,010 |
| Year 24 | $82,321 | $50,410 | $31,911 |
| Year 25 | $88,881 | $53,824 | $35,056 |
Start Saving in O'Fallon
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