St. LouisSolar Incentives 2026: Rebates, Tax Credits & Net Metering
St. Louis homeowners stack the 30% federal tax credit and Ameren Missouri net metering. At 4.7 peak sun hours a day, a home with a $120/month bill (about 857 kWh) needs roughly a 7.6 kW system — 19 panels — and pays back in about 9.3 years.
Solar Incentives Available in St. Louis
Solar incentives in St. Louis come in three layers. First, every homeowner qualifies for the 30% federal Residential Clean Energy Credit on the full installed cost, claimed on IRS Form 5695. Missouri does not add a state income tax credit, so the federal credit is the main up-front incentive. Third, Ameren Missouri sets the local rules for crediting the solar power you export.
Ameren Missouri pairs net metering with a residential solar rebate it has run historically, lowering St. Louis system costs.
How Much Solar St. Louis Homes Produce
St. Louis gets 4.7 peak sun hours a day, so each 1 kW of panels produces about 1,372 kWh per year here. A 7.6 kW system — the size that fits a typical $120/month Ameren Missouri bill — generates roughly 10,430 kWh annually, worth about $1,460 in avoided electricity in year one and more as rates rise.
Ameren Missouri Net Metering in St. Louis
Ameren Missouri credits excess solar generation from St. Louis homes under Missouri's full retail-rate net metering (~100% of retail). A right-sized system can bring net annual electricity costs close to zero. See full Missouri net metering rules →
How Much Do Solar Panels Cost in St. Louis?
At Missouri's 2026 average of $2.85/watt, the 7.6 kW system most St. Louis homes need runs about $21,660 before incentives. The 30% federal credit takes off $6,498 — landing the net cost near $15,162, with payback around 9.3 years.
Get matched with vetted solar installers in St. Louis
The incentives on this page tell you what solar is worth. The next step is real quotes. Compare pre-screened local installers through EnergySage — free, no phone spam, and you stay anonymous until you choose to connect.
Compare Free Quotes →SolarIQ may earn a commission when you request quotes through our partners, at no cost to you. This never affects our incentive data or recommendations.
Frequently Asked Questions
Solar Incentives in Other Missouri Cities
See your exact St. Louis solar savings
Enter your Ameren Missouri bill and we'll apply every Missouri and federal incentive to your real numbers — system size, net cost, payback, and 25-year savings.