How Much Can Solar Save in Cornell?
Real numbers based on current Ameren Illinois rates and Illinois incentives.
$117
Current Bill/mo
$136
Est. Lease + Battery
8.5 yrs
Payback Period
$28,453
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
$117
Annual Cost
$1,404
25-Year Cost (No Solar)
$77,030
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 Cornell
| Metric | Without Solar | With Solar |
|---|---|---|
| Monthly Cost | $117/mo | $140/mo (loan) |
| Monthly Cash Flow | -$0 (all to utility) | $-38/mo |
| 5-Year Cost | $7,582 | $8,400 |
| 25-Year Cost | $77,030 | $48,577 |
| 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
$28,453
Without Solar
With Solar
Year 1
$1,404
$1,861
Year 2Payback Year
$2,892
-$4,268
Year 5
$7,914
$1,482
Year 10
$18,506
$11,557
Year 15
$32,679
$22,486
Year 20
$51,647
$34,647
Year 25
$77,030
$48,577
| Year | Without Solar | With Solar | Cumulative Savings |
|---|---|---|---|
| Year 1 | $1,404 | $1,861 | -$457 |
| Year 2Payback | $2,892 | -$4,268 | $7,161 |
| Year 3 | $4,470 | -$2,372 | $6,842 |
| Year 4 | $6,142 | -$456 | $6,598 |
| Year 5 | $7,914 | $1,482 | $6,433 |
| Year 6 | $9,793 | $3,443 | $6,351 |
| Year 7 | $11,785 | $5,429 | $6,356 |
| Year 8 | $13,896 | $7,441 | $6,455 |
| Year 9 | $16,134 | $9,483 | $6,650 |
| Year 10 | $18,506 | $11,557 | $6,949 |
| Year 11 | $21,020 | $13,664 | $7,356 |
| Year 12 | $23,685 | $15,808 | $7,878 |
| Year 13 | $26,511 | $17,990 | $8,520 |
| Year 14 | $29,505 | $20,215 | $9,290 |
| Year 15 | $32,679 | $22,486 | $10,194 |
| Year 16 | $36,044 | $24,805 | $11,239 |
| Year 17 | $39,611 | $27,176 | $12,434 |
| Year 18 | $43,392 | $29,605 | $13,787 |
| Year 19 | $47,399 | $32,093 | $15,306 |
| Year 20 | $51,647 | $34,647 | $17,000 |
| Year 21 | $56,150 | $37,271 | $18,878 |
| Year 22 | $60,923 | $39,971 | $20,952 |
| Year 23 | $65,982 | $42,751 | $23,232 |
| Year 24 | $71,345 | $45,617 | $25,728 |
| Year 25 | $77,030 | $48,577 | $28,453 |
Start Saving in Cornell
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