How Much Can Solar Save in Washington?
Real numbers based on current Ameren Illinois rates and Illinois incentives.
$152
Current Bill/mo
$152
Est. Lease + Battery
6.4 yrs
Payback Period
$47,331
25-Year Savings
What You're Paying Now
Without solar, here's what Ameren Illinois electricity will cost you over time at 6% annual rate increases.
Monthly Bill
$152
Annual Cost
$1,824
25-Year Cost (No Solar)
$100,073
Your Solar Investment
7 kW System
$20,300
$11,194
After All IL Incentives
DG Rebate ($300/kW)-$2,100
Illinois Shines RECs (lump sum, ~18 mo)-$7,006
With vs Without Solar in Washington
| Metric | Without Solar | With Solar |
|---|---|---|
| Monthly Cost | $152/mo | $123/mo (loan) |
| Monthly Cash Flow | -$0 (all to utility) | +$3/mo |
| 5-Year Cost | $9,850 | $7,380 |
| 25-Year Cost | $100,073 | $52,742 |
| 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
$47,331
Without Solar
With Solar
Year 1Payback Year
$1,824
$1,783
Year 5
$10,282
$2,197
Year 10
$24,042
$12,299
Year 15
$42,455
$23,689
Year 20
$67,097
$36,915
Year 25
$100,073
$52,742
| Year | Without Solar | With Solar | Cumulative Savings |
|---|---|---|---|
| Year 1Payback | $1,824 | $1,783 | $41 |
| Year 2 | $3,757 | -$3,413 | $7,170 |
| Year 3 | $5,807 | -$1,574 | $7,381 |
| Year 4 | $7,979 | $295 | $7,685 |
| Year 5 | $10,282 | $2,197 | $8,085 |
| Year 6 | $12,723 | $4,135 | $8,588 |
| Year 7 | $15,310 | $6,111 | $9,199 |
| Year 8 | $18,053 | $8,128 | $9,925 |
| Year 9 | $20,960 | $10,190 | $10,770 |
| Year 10 | $24,042 | $12,299 | $11,743 |
| Year 11 | $27,308 | $14,459 | $12,849 |
| Year 12 | $30,771 | $16,674 | $14,097 |
| Year 13 | $34,441 | $18,947 | $15,494 |
| Year 14 | $38,331 | $21,284 | $17,047 |
| Year 15 | $42,455 | $23,689 | $18,766 |
| Year 16 | $46,827 | $26,166 | $20,660 |
| Year 17 | $51,460 | $28,722 | $22,739 |
| Year 18 | $56,372 | $31,361 | $25,011 |
| Year 19 | $61,578 | $34,090 | $27,489 |
| Year 20 | $67,097 | $36,915 | $30,182 |
| Year 21 | $72,947 | $39,843 | $33,104 |
| Year 22 | $79,148 | $42,881 | $36,266 |
| Year 23 | $85,720 | $46,038 | $39,682 |
| Year 24 | $92,688 | $49,322 | $43,366 |
| Year 25 | $100,073 | $52,742 | $47,331 |
Start Saving in Washington
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Ameren Illinois rates projected to rise again next year. Lock in savings now.