At CORVUS PRO SOLAR, our goal is to make this process as transparent and “easy” as possible, a sentiment echoed by many of your neighbors in our 4.9 star Google Reviews.
Your system at a glance
23 panels, 10.58 kW, producing about 13,412 kWh a year.
Your actual roof layout from the design team.
10.58 kW
23 panels
13,412
kWh made each year
100%
of your power covered
What you pay every month, for 25 years
Orange is Ameren Illinois, climbing 13.5% a year. Green is your solar payment, locked to 2.99% a year. The gap between them is money you keep.
Ameren Illinois bill
Solar payment
Your system
System size
10.58 kW
Panels
23
Panel model
REC460AA Pure-RX-DC
Energy offset
100%
Year 1 production
13,412 kWh
Utility
Ameren Illinois
Monthly solar payment
$146.77
Current power bill
$207
Where this lands
Your solar payment is lower than your power bill from month one, and the distance only widens.
Today
Ameren$207/mo
Solar$147/mo
You keep $60 a month
Year 10
Ameren$646/mo
Solar$191/mo
You keep $455 a month
Year 25
Ameren$4,319/mo
Solar$298/mo
You keep $4,021 a month
Year by year
Your first five years, with all 25 a click away. Ameren Illinois escalated 13.5% annually from $207 a month. Solar escalated 2.99% annually from $146.77 a month.
| Year | Ameren Illinois | Solar | Saved / mo | Saved / yr | Running total |
|---|---|---|---|---|---|
| 1 | $207 | $147 | $60 | $720 | $720 |
| 2 | $235 | $151 | $84 | $1,002 | $1,722 |
| 3 | $266 | $156 | $111 | $1,328 | $3,050 |
| 4 | $302 | $160 | $142 | $1,704 | $4,753 |
| 5 | $343 | $165 | $178 | $2,136 | $6,889 |
| 25 yr | $417,324 | $64,129 | $353,195 | $353,195 |
View all 25 yearsShow less
| Year | Ameren Illinois | Solar | Saved / mo | Saved / yr | Running total |
|---|---|---|---|---|---|
| 6 | $389 | $170 | $219 | $2,632 | $9,521 |
| 7 | $442 | $175 | $267 | $3,202 | $12,724 |
| 8 | $502 | $180 | $321 | $3,855 | $16,579 |
| 9 | $569 | $186 | $384 | $4,603 | $21,182 |
| 10 | $646 | $191 | $455 | $5,459 | $26,641 |
| 11 | $734 | $197 | $536 | $6,437 | $33,079 |
| 12 | $833 | $203 | $630 | $7,555 | $40,634 |
| 13 | $945 | $209 | $736 | $8,831 | $49,465 |
| 14 | $1,072 | $215 | $857 | $10,287 | $59,751 |
| 15 | $1,217 | $222 | $996 | $11,947 | $71,698 |
| 16 | $1,382 | $228 | $1,153 | $13,839 | $85,538 |
| 17 | $1,568 | $235 | $1,333 | $15,996 | $101,533 |
| 18 | $1,780 | $242 | $1,538 | $18,452 | $119,985 |
| 19 | $2,020 | $249 | $1,771 | $21,248 | $141,233 |
| 20 | $2,293 | $257 | $2,036 | $24,431 | $165,664 |
| 21 | $2,602 | $265 | $2,338 | $28,053 | $193,717 |
| 22 | $2,954 | $272 | $2,681 | $32,174 | $225,891 |
| 23 | $3,352 | $281 | $3,072 | $36,861 | $262,752 |
| 24 | $3,805 | $289 | $3,516 | $42,191 | $304,943 |
| 25 | $4,319 | $298 | $4,021 | $48,252 | $353,195 |
The fine print
- What this compares. Your current average power bill of $207 a month against your solar payment of $146.77 a month, over 25 years. Utility escalated at 13.5% per year, solar at 2.99% per year.
- Still connected to the grid. You are still connected to the utility grid and would be expected to pay a small fixed monthly rate, considered the standard connection fee.
- Ameren Illinois rates are moving. Ameren Illinois residential rates have risen about 94% since 2021, from roughly 8 cents to 15.5 cents per kWh in 2026, driven by ICC approved increases and a sharp rise in regional capacity prices. Past increases do not guarantee future ones.
- This is an estimate, not a contract. Production, rates and savings are projections. Nothing here is a guarantee.