Cost to install solar panels in St. Louis, MO (2026)
In St. Louis, MO, a solar panel installation project usually costs $14,500–$38,000, averaging near $24,000. Below is what drives that price and how to keep it in check.
What drives the cost
- System size (kW) and panel type
- Roof type and complexity
- Inverter and battery storage
- Before federal/state incentives
What's typically included
- Panels, inverter and mounting
- Permitting and inspection
- Utility interconnection
- Labor (pre-incentive price)
Where the money typically goes
As a rough rule of thumb for home systems (HVAC, electrical, plumbing) projects, quotes tend to break down like this — actual splits vary by contractor and scope:
How to get the best price in St. Louis
Get 2–3 itemized quotes from licensed, insured local pros and compare the same scope and materials. Ask about off-season timing and bundling related work. The lowest bid isn't always the best value — check reviews, licensing and warranty.
Local factors in St. Louis, MO
St. Louis has one of the higher shares of older brick housing stock among major Midwest metros, and masonry-specific repair or matching work (tuckpointing, brick replacement) is a more common cost factor here than in wood-frame-dominated markets. Missouri's freeze-thaw winters also make foundation drainage a routine consideration on exterior projects.
Frequently asked questions
How much does it cost to install solar panels in St. Louis, MO?
In St. Louis, MO, it typically costs $14,500 to $38,000, with an average of about $24,000. Your exact price depends on system size (kw) and panel type and roof type and complexity.
What affects the price the most?
The biggest cost drivers are: System size (kW) and panel type; Roof type and complexity; Inverter and battery storage; Before federal/state incentives. Getting 2–3 itemized quotes is the best way to see how these apply to your specific project.
What's usually included?
A standard quote to install solar panels generally includes: Panels, inverter and mounting; Permitting and inspection; Utility interconnection; Labor (pre-incentive price). Always confirm what's in (and out of) scope before signing.
How can I save money?
Get multiple quotes, ask about off-season scheduling, bundle related work, and make sure you're comparing the same scope and materials. The cheapest bid isn't always the best value — check licensing, insurance and reviews.
Are these prices exact?
No — they're estimated local ranges for planning, derived from national averages adjusted for St. Louis, MO costs. For an exact number, get a free in-person quote from a local pro.