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 20,688 kWh a year.
Your actual roof layout from the design team.
What you pay every month, for 25 years
Your system is built to make about 20,688 kWh a year, more than the 15,018 kWh your home uses today. So the orange bars are not your old bill. They are what that same 20,688 kWh would cost you at Ameren's current rate of about 18 cents a kWh, climbing 13.5% a year for the first 5 years, then 7% a year after that. Green is your solar payment, locked to 2.99% a year. The gap between them is money you keep.
Your system
Where this lands
Your solar payment is lower than what this much power costs from Ameren from month one, and the distance only widens.
Year by year
Your first five years, with all 25 a click away. Ameren Illinois escalated 13.5% a year for the first 5 years, then 7% a year after that, starting from $309 a month, the cost of buying this system's power from Ameren at today's rate. Solar escalated 2.99% annually from $262.40 a month.
| Year | Ameren Illinois | Solar | Saved / mo | Saved / yr | Running total |
|---|---|---|---|---|---|
| 1 | $309 | $262 | $47 | $565 | $565 |
| 2 | $351 | $270 | $81 | $972 | $1,537 |
| 3 | $399 | $278 | $120 | $1,444 | $2,982 |
| 4 | $453 | $287 | $166 | $1,990 | $4,972 |
| 5 | $514 | $295 | $218 | $2,621 | $7,593 |
| 25 yr | $294,659 | $114,652 | $180,007 | $180,007 |
View all 25 yearsShow less
| Year | Ameren Illinois | Solar | Saved / mo | Saved / yr | Running total |
|---|---|---|---|---|---|
| 6 | $550 | $304 | $246 | $2,946 | $10,539 |
| 7 | $588 | $313 | $275 | $3,299 | $13,838 |
| 8 | $629 | $322 | $307 | $3,680 | $17,518 |
| 9 | $673 | $332 | $341 | $4,093 | $21,611 |
| 10 | $720 | $342 | $378 | $4,539 | $26,150 |
| 11 | $771 | $352 | $418 | $5,022 | $31,172 |
| 12 | $825 | $363 | $462 | $5,543 | $36,715 |
| 13 | $882 | $374 | $509 | $6,105 | $42,820 |
| 14 | $944 | $385 | $559 | $6,713 | $49,533 |
| 15 | $1,010 | $396 | $614 | $7,368 | $56,900 |
| 16 | $1,081 | $408 | $673 | $8,074 | $64,975 |
| 17 | $1,157 | $420 | $736 | $8,836 | $73,810 |
| 18 | $1,238 | $433 | $805 | $9,657 | $83,467 |
| 19 | $1,324 | $446 | $878 | $10,541 | $94,008 |
| 20 | $1,417 | $459 | $958 | $11,493 | $105,501 |
| 21 | $1,516 | $473 | $1,043 | $12,519 | $118,020 |
| 22 | $1,622 | $487 | $1,135 | $13,623 | $131,643 |
| 23 | $1,736 | $502 | $1,234 | $14,811 | $146,454 |
| 24 | $1,857 | $517 | $1,341 | $16,089 | $162,543 |
| 25 | $1,987 | $532 | $1,455 | $17,464 | $180,007 |
The fine print
- What this compares. This system is sized to make about 20,688 kWh a year, which is 138% of the 15,018 kWh your home uses today. Rather than set a system that makes more power than you currently buy against your present bill of $225 a month, the orange line prices that same 20,688 kWh at Ameren's current rate of about 18 cents a kWh, which comes to $309 a month. That runs against your solar payment of $262.40 a month over 25 years. Utility escalated at 13.5% per year for the first 5 years, then 7% per year after that, 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 are up about 94 percent since 2021, from roughly 8 cents a kWh to about 15.5 cents a kWh in 2026, driven by rate increases approved by the Illinois Commerce Commission 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.