How Much Can Solar Save in Darien?
Real numbers based on current ComEd rates and Illinois incentives.
$209
Current Bill/mo
$172
Est. Lease + Battery
7.4 yrs
Payback Period
$55,846
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
$209
Annual Cost
$2,508
25-Year Cost (No Solar)
$137,600
Your Solar Investment
12 kW System
$34,800
$18,566
After All IL Incentives
DG Rebate ($300/kW)-$3,600
Illinois Shines RECs (lump sum, ~18 mo)-$12,634
With vs Without Solar in Darien
| Metric | Without Solar | With Solar |
|---|---|---|
| Monthly Cost | $209/mo | $211/mo (loan) |
| Monthly Cash Flow | -$0 (all to utility) | $-37/mo |
| 5-Year Cost | $13,543 | $12,660 |
| 25-Year Cost | $137,600 | $81,754 |
| 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
$55,846
Without Solar
With Solar
Year 1
$2,508
$2,947
Year 2Payback Year
$5,166
-$6,704
Year 5
$14,138
$2,492
Year 10
$33,057
$18,845
Year 15
$58,376
$36,957
Year 20
$92,258
$57,577
Year 25
$137,600
$81,755
| Year | Without Solar | With Solar | Cumulative Savings |
|---|---|---|---|
| Year 1 | $2,508 | $2,947 | -$439 |
| Year 2Payback | $5,166 | -$6,704 | $11,870 |
| Year 3 | $7,984 | -$3,682 | $11,666 |
| Year 4 | $10,972 | -$617 | $11,589 |
| Year 5 | $14,138 | $2,492 | $11,646 |
| Year 6 | $17,494 | $5,650 | $11,844 |
| Year 7 | $21,052 | $8,860 | $12,192 |
| Year 8 | $24,823 | $12,126 | $12,697 |
| Year 9 | $28,820 | $15,453 | $13,367 |
| Year 10 | $33,057 | $18,845 | $14,213 |
| Year 11 | $37,549 | $22,306 | $15,243 |
| Year 12 | $42,310 | $25,842 | $16,468 |
| Year 13 | $47,356 | $29,459 | $17,898 |
| Year 14 | $52,706 | $33,161 | $19,544 |
| Year 15 | $58,376 | $36,957 | $21,419 |
| Year 16 | $64,387 | $40,852 | $23,535 |
| Year 17 | $70,758 | $44,853 | $25,905 |
| Year 18 | $77,511 | $48,969 | $28,543 |
| Year 19 | $84,670 | $53,207 | $31,463 |
| Year 20 | $92,258 | $57,577 | $34,681 |
| Year 21 | $100,302 | $62,088 | $38,214 |
| Year 22 | $108,828 | $66,750 | $42,078 |
| Year 23 | $117,866 | $71,574 | $46,292 |
| Year 24 | $127,445 | $76,571 | $50,874 |
| Year 25 | $137,600 | $81,755 | $55,846 |
Start Saving in Darien
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