How Much Can Solar Save in Oak Brook?
Real numbers based on current ComEd rates and Illinois incentives.
$259
Current Bill/mo
$197
Est. Lease + Battery
5.8 yrs
Payback Period
$85,407
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
$259
Annual Cost
$3,108
25-Year Cost (No Solar)
$170,519
Your Solar Investment
11 kW System
$31,900
$17,019
After All IL Incentives
DG Rebate ($300/kW)-$3,300
Illinois Shines RECs (lump sum, ~18 mo)-$11,581
With vs Without Solar in Oak Brook
| Metric | Without Solar | With Solar |
|---|---|---|
| Monthly Cost | $259/mo | $193/mo (loan) |
| Monthly Cash Flow | -$0 (all to utility) | +$22/mo |
| 5-Year Cost | $16,783 | $11,580 |
| 25-Year Cost | $170,519 | $85,112 |
| 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
$85,407
Without Solar
With Solar
Year 1Payback Year
$3,108
$2,839
Year 5
$17,520
$3,098
Year 10
$40,966
$19,301
Year 15
$72,342
$37,690
Year 20
$114,330
$59,193
Year 25
$170,519
$85,112
| Year | Without Solar | With Solar | Cumulative Savings |
|---|---|---|---|
| Year 1Payback | $3,108 | $2,839 | $269 |
| Year 2 | $6,402 | -$5,859 | $12,261 |
| Year 3 | $9,895 | -$2,926 | $12,821 |
| Year 4 | $13,596 | $58 | $13,538 |
| Year 5 | $17,520 | $3,098 | $14,422 |
| Year 6 | $21,679 | $6,199 | $15,480 |
| Year 7 | $26,088 | $9,365 | $16,723 |
| Year 8 | $30,761 | $12,600 | $18,161 |
| Year 9 | $35,715 | $15,910 | $19,805 |
| Year 10 | $40,966 | $19,301 | $21,664 |
| Year 11 | $46,532 | $22,779 | $23,753 |
| Year 12 | $52,432 | $26,350 | $26,082 |
| Year 13 | $58,686 | $30,020 | $28,666 |
| Year 14 | $65,315 | $33,797 | $31,518 |
| Year 15 | $72,342 | $37,690 | $34,652 |
| Year 16 | $79,790 | $41,706 | $38,085 |
| Year 17 | $87,686 | $45,854 | $41,832 |
| Year 18 | $96,055 | $50,144 | $45,911 |
| Year 19 | $104,926 | $54,587 | $50,339 |
| Year 20 | $114,330 | $59,193 | $55,137 |
| Year 21 | $124,297 | $63,973 | $60,324 |
| Year 22 | $134,863 | $68,942 | $65,921 |
| Year 23 | $146,063 | $74,111 | $71,952 |
| Year 24 | $157,935 | $79,496 | $78,439 |
| Year 25 | $170,519 | $85,112 | $85,407 |
Start Saving in Oak Brook
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