How Much Can Solar Save in Rock City?
Real numbers based on current ComEd rates and Illinois incentives.
$132
Current Bill/mo
$136
Est. Lease + Battery
5.7 yrs
Payback Period
$43,652
25-Year Savings
What You're Paying Now
Without solar, here's what ComEd electricity will cost you over time at 6% annual rate increases.
Monthly Bill
$132
Annual Cost
$1,584
25-Year Cost (No Solar)
$86,905
Your Solar Investment
6 kW System
$17,400
$8,767
After All IL Incentives
DG Rebate ($300/kW)-$1,800
Illinois Shines RECs (lump sum, ~18 mo)-$6,833
With vs Without Solar in Rock City
| Metric | Without Solar | With Solar |
|---|---|---|
| Monthly Cost | $132/mo | $105/mo (loan) |
| Monthly Cash Flow | -$0 (all to utility) | +$7/mo |
| 5-Year Cost | $8,554 | $6,300 |
| 25-Year Cost | $86,905 | $43,253 |
| 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
$43,652
Without Solar
With Solar
Year 1Payback Year
$1,584
$1,505
Year 5
$8,929
$924
Year 10
$20,878
$9,416
Year 15
$36,869
$18,966
Year 20
$58,268
$30,032
Year 25
$86,905
$43,254
| Year | Without Solar | With Solar | Cumulative Savings |
|---|---|---|---|
| Year 1Payback | $1,584 | $1,505 | $79 |
| Year 2 | $3,263 | -$3,802 | $7,065 |
| Year 3 | $5,043 | -$2,252 | $7,295 |
| Year 4 | $6,929 | -$677 | $7,607 |
| Year 5 | $8,929 | $924 | $8,005 |
| Year 6 | $11,049 | $2,555 | $8,494 |
| Year 7 | $13,296 | $4,217 | $9,078 |
| Year 8 | $15,678 | $5,913 | $9,764 |
| Year 9 | $18,202 | $7,645 | $10,557 |
| Year 10 | $20,878 | $9,416 | $11,462 |
| Year 11 | $23,715 | $11,229 | $12,486 |
| Year 12 | $26,722 | $13,087 | $13,635 |
| Year 13 | $29,909 | $14,994 | $14,916 |
| Year 14 | $33,288 | $16,952 | $16,336 |
| Year 15 | $36,869 | $18,966 | $17,903 |
| Year 16 | $40,665 | $21,041 | $19,625 |
| Year 17 | $44,689 | $23,180 | $21,510 |
| Year 18 | $48,955 | $25,388 | $23,567 |
| Year 19 | $53,476 | $27,670 | $25,806 |
| Year 20 | $58,268 | $30,032 | $28,237 |
| Year 21 | $63,348 | $32,479 | $30,869 |
| Year 22 | $68,733 | $35,018 | $33,715 |
| Year 23 | $74,441 | $37,656 | $36,786 |
| Year 24 | $80,492 | $40,398 | $40,094 |
| Year 25 | $86,905 | $43,254 | $43,652 |
Start Saving in Rock City
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