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
43 panels, 19.78 kW, producing about 22,960 kWh a year.
Your actual roof layout from the design team.
19.78 kW
43 panels
22,960
kWh made each year
99%
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
19.78 kW
Panels
43
Panel model
REC460AA Pure-RX-DC
Energy offset
99%
Year 1 production
22,960 kWh
Utility
Ameren Illinois
Monthly solar payment
$236.76
Current power bill
$290
Where this lands
Your solar payment is lower than your power bill from month one, and the distance only widens.
Today
Ameren$290/mo
Solar$237/mo
You keep $53 a month
Year 10
Ameren$907/mo
Solar$309/mo
You keep $598 a month
Year 25
Ameren$6,059/mo
Solar$480/mo
You keep $5,579 a month
Year by year
Your first five years, with all 25 a click away. Ameren Illinois escalated 13.5% annually from $290 a month. Solar escalated 2.99% annually from $236.76 a month.
| Year | Ameren Illinois | Solar | Saved / mo | Saved / yr | Running total |
|---|---|---|---|---|---|
| 1 | $290 | $237 | $53 | $640 | $640 |
| 2 | $329 | $244 | $85 | $1,025 | $1,665 |
| 3 | $374 | $251 | $123 | $1,471 | $3,135 |
| 4 | $424 | $259 | $166 | $1,986 | $5,122 |
| 5 | $481 | $266 | $215 | $2,580 | $7,702 |
| 25 yr | $585,532 | $103,449 | $482,083 | $482,083 |
View all 25 yearsShow less
| Year | Ameren Illinois | Solar | Saved / mo | Saved / yr | Running total |
|---|---|---|---|---|---|
| 6 | $546 | $274 | $272 | $3,265 | $10,966 |
| 7 | $620 | $283 | $338 | $4,051 | $15,018 |
| 8 | $704 | $291 | $413 | $4,955 | $19,972 |
| 9 | $799 | $300 | $499 | $5,990 | $25,963 |
| 10 | $907 | $309 | $598 | $7,177 | $33,140 |
| 11 | $1,029 | $318 | $711 | $8,535 | $41,675 |
| 12 | $1,168 | $327 | $841 | $10,089 | $51,764 |
| 13 | $1,326 | $337 | $989 | $11,863 | $63,627 |
| 14 | $1,505 | $347 | $1,158 | $13,890 | $77,518 |
| 15 | $1,708 | $358 | $1,350 | $16,203 | $93,721 |
| 16 | $1,938 | $368 | $1,570 | $18,842 | $112,563 |
| 17 | $2,200 | $379 | $1,821 | $21,850 | $134,413 |
| 18 | $2,497 | $391 | $2,107 | $25,278 | $159,691 |
| 19 | $2,834 | $402 | $2,432 | $29,183 | $188,874 |
| 20 | $3,217 | $414 | $2,803 | $33,631 | $222,505 |
| 21 | $3,651 | $427 | $3,224 | $38,693 | $261,198 |
| 22 | $4,144 | $440 | $3,705 | $44,455 | $305,654 |
| 23 | $4,704 | $453 | $4,251 | $51,011 | $356,665 |
| 24 | $5,339 | $466 | $4,872 | $58,469 | $415,133 |
| 25 | $6,059 | $480 | $5,579 | $66,950 | $482,083 |
The fine print
- What this compares. Your current average power bill of $290 a month against your solar payment of $236.76 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.