
Solar Panel Cost in Missouri
Updated 2026 guide to solar panel prices, savings, and payback period in Missouri.
Estimated Solar Savings
Solar Panel System Costs in Missouri
Below are estimated costs for different solar panel system sizes in Missouri, including the 30% federal solar tax credit.
| System Size | Cost Before Incentives | Federal Tax Credit (30%) | Net Cost | Est. Annual Production |
|---|---|---|---|---|
| 4 kW | $11,400 | -$3,420 | $7,980 | 6,278 kWh |
| 6 kWMost Popular | $17,100 | -$5,130 | $11,970 | 9,417 kWh |
| 8 kW | $22,800 | -$6,840 | $15,960 | 12,556 kWh |
| 10 kW | $28,500 | -$8,550 | $19,950 | 15,695 kWh |
| 12 kW | $34,200 | -$10,260 | $23,940 | 18,834 kWh |
What Affects Solar Panel Cost in Missouri?
The average cost of solar panels in Missouri is $285/watt before incentives. For a typical 6kW residential system, that means a total cost of about $17,100 before the federal tax credit.
After applying the 30% federal Investment Tax Credit (ITC), your net cost drops to approximately $11,970.Missouri homeowners typically see a payback period of 9 years and save an estimated $27,000 over 25 years.
Missouri solar costs have decreased approximately 40% over the last decade. Rebate programs from utilities like Ameren have helped drive residential solar growth.
Factors that affect your cost:
- System size: Larger systems cost more but have a lower cost per watt
- Equipment quality: Premium panels and inverters cost more but offer better efficiency
- Roof complexity: Steep roofs, multiple levels, or shading can increase installation costs
- Local labor rates: Installation costs vary by region within Missouri
- Incentives: State and local programs can significantly reduce your out-of-pocket cost

Solar Incentives in Missouri
Federal Solar Investment Tax Credit
30% Federal Tax Credit (ITC)
Missouri homeowners can take advantage of the 30% federal ITC along with utility-specific rebate programs.
State & Local Incentives
Ameren Missouri Solar Rebate
RebateAmeren Missouri offers rebates for residential solar installations in their service territory.
Property Tax Exemption
Property TaxMissouri exempts solar energy systems from real property tax assessments.
Net Metering
Missouri requires investor-owned utilities to offer net metering for systems up to 100 kW. Customers receive credits at the retail rate.
AvailableSRECs
Missouri's Renewable Energy Standard includes a solar carve-out, but the state does not have an active SREC trading market for residential customers.
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Solar Panel Cost FAQ - Missouri
The cost of solar panels in Missouri typically ranges from $2.50 to $3.50 per watt before incentives. For a standard 6 kW residential system, homeowners in Missouri can expect to pay between $15,000 and $21,000 before the federal tax credit. After applying the 30% federal Investment Tax Credit, the net cost drops to approximately $10,500-$14,700. Actual costs vary based on your specific roof, chosen equipment, and installer. We recommend getting at least three quotes from local Missouri solar installers to find the best price.
The average solar payback period in Missouri depends on local electricity rates, available incentives, and sun exposure. Most Missouri homeowners see a payback period between 6 and 10 years. After the payback period, you essentially enjoy free electricity for the remaining 15-20+ years of your system's life. Higher local electricity rates and additional state incentives can shorten the payback period significantly. A qualified Missouri solar installer can calculate your specific payback period based on your energy usage and roof characteristics.
Missouri homeowners who install solar panels typically save between $20,000 and $50,000 over 25 years, depending on system size, electricity rates, and available incentives. These savings come from reduced or eliminated electricity bills, net metering credits, and any applicable SREC income. As electricity rates in Missouri continue to rise (historically averaging 2-3% annually), your savings grow each year. The combination of the 30% federal tax credit and any Missouri-specific incentives helps maximize your return on investment.
The right solar system size for your Missouri home depends on your electricity consumption, roof space, and budget. The average Missouri home uses approximately 10,000-11,000 kWh per year, which typically requires a 6-8 kW solar system. To determine your ideal size, review your annual electricity usage on recent utility bills. Factors like Missouri's average peak sun hours, your roof orientation, and any shading will affect how many panels you need. A professional Missouri solar installer will use satellite imagery and your usage data to recommend the optimal system size.
Yes, solar is generally worth the investment for Missouri homeowners in 2025. With solar panel costs at historic lows, the 30% federal tax credit still available, and electricity rates continuing to rise, the financial case for solar in Missouri is strong. Most Missouri homeowners who go solar see positive returns within 6-10 years, followed by 15-20+ years of significant savings. Additionally, solar panels increase your home value, provide energy independence, and protect against future electricity rate increases. The best way to determine if solar is right for your Missouri home is to get a free, customized quote from a qualified local installer.
Solar Panel Costs by City in Missouri
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