How Much Can Solar Save in Harvard?
Real numbers based on current ComEd rates and Illinois incentives.
$145
Current Bill/mo
$144
Est. Lease + Battery
5.9 yrs
Payback Period
$48,143
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
$145
Annual Cost
$1,740
25-Year Cost (No Solar)
$95,464
Your Solar Investment
7 kW System
$20,300
$10,228
After All IL Incentives
DG Rebate ($300/kW)-$2,100
Illinois Shines RECs (lump sum, ~18 mo)-$7,972
With vs Without Solar in Harvard
| Metric | Without Solar | With Solar |
|---|---|---|
| Monthly Cost | $145/mo | $123/mo (loan) |
| Monthly Cash Flow | -$0 (all to utility) | +$3/mo |
| 5-Year Cost | $9,396 | $7,380 |
| 25-Year Cost | $95,464 | $47,321 |
| 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
$48,143
Without Solar
With Solar
Year 1Payback Year
$1,740
$1,702
Year 5
$9,809
$774
Year 10
$22,935
$10,265
Year 15
$40,500
$20,835
Year 20
$64,007
$32,964
Year 25
$95,464
$47,321
| Year | Without Solar | With Solar | Cumulative Savings |
|---|---|---|---|
| Year 1Payback | $1,740 | $1,702 | $38 |
| Year 2 | $3,584 | -$4,546 | $8,130 |
| Year 3 | $5,539 | -$2,798 | $8,338 |
| Year 4 | $7,612 | -$1,026 | $8,637 |
| Year 5 | $9,809 | $774 | $9,034 |
| Year 6 | $12,137 | $2,604 | $9,533 |
| Year 7 | $14,605 | $4,465 | $10,140 |
| Year 8 | $17,222 | $6,360 | $10,861 |
| Year 9 | $19,995 | $8,293 | $11,702 |
| Year 10 | $22,935 | $10,265 | $12,670 |
| Year 11 | $26,051 | $12,279 | $13,771 |
| Year 12 | $29,354 | $14,340 | $15,014 |
| Year 13 | $32,855 | $16,451 | $16,404 |
| Year 14 | $36,566 | $18,614 | $17,952 |
| Year 15 | $40,500 | $20,835 | $19,665 |
| Year 16 | $44,670 | $23,118 | $21,552 |
| Year 17 | $49,090 | $25,467 | $23,623 |
| Year 18 | $53,776 | $27,888 | $25,888 |
| Year 19 | $58,742 | $30,384 | $28,358 |
| Year 20 | $64,007 | $32,964 | $31,043 |
| Year 21 | $69,587 | $35,631 | $33,956 |
| Year 22 | $75,503 | $38,393 | $37,109 |
| Year 23 | $81,773 | $41,257 | $40,515 |
| Year 24 | $88,419 | $44,231 | $44,188 |
| Year 25 | $95,464 | $47,321 | $48,143 |
Start Saving in Harvard
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