Drive through rural Texas, Arizona, or Georgia and you will see them: rows of solar panels stretching across hundreds of acres. Under every one of those panels is a steel structure. Mounting rails, driven piles, tracker torque tubes, cable trays, equipment pads. A 100-megawatt solar farm uses 4,000 to 6,000 tons of steel. The U.S. installed over 32 gigawatts of solar capacity in 2024. That is a lot of steel.
What Solar Projects Buy
The steel products used in solar construction are mostly commodity items that service centers already stock. Hot-rolled structural shapes (W-beams, channels, angles) for equipment foundations and substation structures. Galvanized pipe and tube for tracker systems. Hot-rolled sheet and plate for mounting brackets and equipment pads. Hot-dipped galvanized coil for roll-formed mounting rails.
The specifications are not exotic. Most structural components call for A36 or A572 Grade 50. Mounting hardware is typically galvanized to G90 or G185 coating weight. Tracker torque tubes use standard mechanical tubing in common sizes. The material is ordinary. The opportunity is in the volume and the project timeline requirements.
How Solar Buying Differs from Traditional Customers
Solar EPC contractors (the companies that engineer, procure, and construct the projects) buy differently from a machine shop or fabricator. They buy in project quantities, often 500 to 2,000 tons per project. They need material delivered to remote job sites, not to a factory loading dock. They operate on tight construction schedules where a two-week delay on steel delivery can push back megawatts of generation and cost the developer $50,000 or more per day in lost revenue.
Pricing is usually bid on a project basis, not from a price sheet. The EPC sends a bill of materials, you quote the package, and the winner gets the entire order. These bids are competitive, but the volume makes up for thinner margins. Winning one solar project can equal the annual volume of 20 small fabrication accounts.
Domestic Content Requirements
The Inflation Reduction Act created bonus tax credits for solar projects that meet domestic content thresholds. For steel and iron, the requirement is that all manufacturing processes (melting and pouring) occur in the United States. This means domestic-melt steel commands a premium in the solar market, and service centers that can certify domestic origin with proper MTR documentation have a competitive advantage.
Track your mill sources carefully. Solar developers and their auditors will review your MTRs to verify country of melt and pour. If you are selling imported steel into a project that claims the domestic content bonus, you are creating a compliance problem for your customer and a legal liability for yourself.
Getting Into the Solar Supply Chain
Start by identifying the EPC contractors and solar developers active in your region. The Solar Energy Industries Association (SEIA) maintains a membership directory. Attend the RE+ conference (formerly Solar Power International) where EPC procurement teams actively look for regional steel suppliers.
Your pitch to solar EPCs is simple: you have material in stock locally, you can deliver to job sites within your region faster than a mill shipment, and you can handle the variable timing of construction schedules where delivery dates shift by days or weeks based on weather and site conditions. Mills want firm release dates six to eight weeks out. You can deliver next week from stock. That flexibility is worth real money to a contractor managing a 12-month construction schedule.
Solar is not a fad market. Installed solar capacity in the U.S. is projected to triple by 2030. Service centers that build relationships with EPCs today will ride that growth curve for the next decade.