How Much Can Solar Save in Big Rock?
Real numbers based on current ComEd rates and Illinois incentives.
$180
Current Bill/mo
$157
Est. Lease + Battery
5.7 yrs
Payback Period
$57,973
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
$180
Annual Cost
$2,160
25-Year Cost (No Solar)
$118,507
Your Solar Investment
8 kW System
$23,200
$11,690
After All IL Incentives
DG Rebate ($300/kW)-$2,400
Illinois Shines RECs (lump sum, ~18 mo)-$9,110
With vs Without Solar in Big Rock
| Metric | Without Solar | With Solar |
|---|---|---|
| Monthly Cost | $180/mo | $140/mo (loan) |
| Monthly Cash Flow | -$0 (all to utility) | +$8/mo |
| 5-Year Cost | $11,664 | $8,400 |
| 25-Year Cost | $118,507 | $60,534 |
| 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
$57,973
Without Solar
With Solar
Year 1Payback Year
$2,160
$2,059
Year 5
$12,176
$1,529
Year 10
$28,471
$13,246
Year 15
$50,276
$26,507
Year 20
$79,457
$41,965
Year 25
$118,507
$60,534
| Year | Without Solar | With Solar | Cumulative Savings |
|---|---|---|---|
| Year 1Payback | $2,160 | $2,059 | $101 |
| Year 2 | $4,450 | -$4,960 | $9,410 |
| Year 3 | $6,877 | -$2,835 | $9,712 |
| Year 4 | $9,449 | -$673 | $10,122 |
| Year 5 | $12,176 | $1,529 | $10,647 |
| Year 6 | $15,067 | $3,773 | $11,293 |
| Year 7 | $18,131 | $6,064 | $12,067 |
| Year 8 | $21,379 | $8,403 | $12,975 |
| Year 9 | $24,821 | $10,796 | $14,025 |
| Year 10 | $28,471 | $13,246 | $15,225 |
| Year 11 | $32,339 | $15,757 | $16,582 |
| Year 12 | $36,439 | $18,333 | $18,106 |
| Year 13 | $40,785 | $20,980 | $19,805 |
| Year 14 | $45,393 | $23,703 | $21,690 |
| Year 15 | $50,276 | $26,507 | $23,769 |
| Year 16 | $55,453 | $29,397 | $26,055 |
| Year 17 | $60,940 | $32,382 | $28,558 |
| Year 18 | $66,756 | $35,466 | $31,290 |
| Year 19 | $72,922 | $38,658 | $34,264 |
| Year 20 | $79,457 | $41,965 | $37,492 |
| Year 21 | $86,384 | $45,395 | $40,990 |
| Year 22 | $93,727 | $48,957 | $44,770 |
| Year 23 | $101,511 | $52,661 | $48,850 |
| Year 24 | $109,762 | $56,516 | $53,245 |
| Year 25 | $118,507 | $60,534 | $57,973 |
Start Saving in Big Rock
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