The global solar energy market experienced unprecedented growth in 2023. According to industry data, the ground-mounted solar EPC market was valued at approximately USD 105.6 billion in 2023, with projections showing continued expansion at a compound annual growth rate exceeding 4.2% through 2032-. Within this growing market, ground screws carved out an increasingly significant niche.

According to Grand View Research, the global ground screw market was projected to grow at an 11.2% compound annual growth rate from 2023 to 2030, driven largely by renewable energy infrastructure development-6. Another report estimated the market size at approximately USD 1.8 billion in 2023, with projections reaching USD 3.4 billion by 2032-.

In Europe, ground screw adoption in solar applications reached a milestone in 2023. Data indicates that 62% of European solar farms utilized ground screws for their mounting systems in 2023, with projections showing this figure rising to 75% by 2025-6. In the United Kingdom specifically, an impressive 90% of solar farm projects adopted ground screws for mounting systems in 2023, cutting concrete consumption by over 20,000 tons per project-6.

The Alibaba International Solar Applications Buyer Popularity Index for January 2023 placed ground screws as the second most in-demand product category, trailing only solar panels themselves, with a buyer demand index of 0.08-1. This ranking underscores the growing global interest in ground screw foundation solutions from international buyers and solar project developers.

Germany’s 2023 solar tenders further validated the market shift, with 85% of winning bids mandating the use of ground screws for their mounting systems-6. This regulatory preference reflects the technology’s proven performance advantages and alignment with sustainability goals.

2. Why Ground Screws Outperform Traditional Concrete Foundations

Ground screws have become a go-to foundation for ground-mounted solar photovoltaic systems because they are fast, precise, and low-impact-14. Instead of digging and pouring concrete or driving steel piles, installers screw galvanized steel anchors into the soil and attach the racking to pre-aligned brackets. The result is a durable, code-compliant base with less disruption, a lower carbon footprint, and a shorter build schedule-14.

Environmental Benefits

The environmental advantages of ground screws over concrete foundations are substantial. Concrete foundations emit approximately 1.2 tons of CO₂ per ton of material, whereas ground screws emit only 0.18 tons of CO₂ per ton—an 85% reduction in carbon emissions-6. Ground screws also achieve over 95% recyclability, supporting circular economy principles in construction-6.

The European Union’s Green New Deal, which mandates a 55% reduction in building emissions by 2030, has accelerated the shift toward low-carbon foundation alternatives like ground screws-6. Similarly, China’s “Dual Carbon” goals have driven demand for concrete alternatives in the renewable energy sector-6.

Installation Speed and Efficiency

Global construction labor shortages have increased costs significantly, with U.S. construction labor costs rising 23% from 2020 to 2023-6. Ground screws address this challenge through excavation-free installation that is three times faster than traditional methods-6.

Ground screws are manufactured from high-grade galvanized steel, providing durability, corrosion resistance, and environmental compatibility-13. With this technology, solar panels can be mounted on virtually any type of terrain, including marshy or rocky ground that would be challenging for concrete foundations-13.

The installation process requires no on-site welding or processing, further reducing labor requirements and accelerating project timelines-12. Each machine can install up to 200 ground screws per day, dramatically improving project throughput compared to concrete foundation installation-12.

Superior Structural Performance

Ground screws excel in solar applications due to their superior lateral load resistance, offering 30% higher wind load capacity compared to traditional foundations-6. They also demonstrate exceptional terrain adaptability, requiring no site preparation for slopes under 25 degrees-6.

The spiral design of ground screws enables them to penetrate and compact the surrounding soil, improving side friction resistance and providing strong bearing capacity, uplift resistance, and horizontal resistance with minimal deformation-12.

In disaster resilience applications, ground screws significantly outperform traditional foundation methods. Ground screws reduce foundation failure rates to just 3% in flood zones, compared to 18% for traditional methods-6. The Netherlands’ 2023 dike reinforcement project utilized ground screw systems to upgrade flood resistance from 50-year to 200-year standards-6.

Design Flexibility and Reusability

Unlike concrete foundations that are permanent and destructive to remove, ground screws can be reversed out during decommissioning or repositioned during layout changes, supporting circularity and lower restoration costs-14. This reusability is particularly valuable for temporary solar installations or projects on leased land.

Ground screws also eliminate the need for concrete curing time, allowing arrays to move from layout to racking in the same day-14. This speed certainty reduces weather-related delays, as ground screws can be installed in cold or wet conditions where concrete installation would be impossible-14.

3. Cost Analysis: Ground Screws vs. Concrete for Solar Projects

Cost competitiveness is one of the primary drivers behind the growing adoption of ground screws for solar panel mounting. A comprehensive analysis reveals significant cost savings across multiple dimensions.

Direct Cost Comparison

On average, the material cost alone for ground screws saves approximately one-third of the cost compared to concrete foundations-48. When factoring in the complete installation process—including excavation, soil removal, concrete pouring, curing time, and waste disposal—the cost advantages become even more pronounced.

Industry data shows that ground screw installation costs are 45% lower than concrete pile installation, with lifecycle costs 37% lower over the system’s operational lifetime-6. These savings stem from reduced labor requirements, elimination of excavation and disposal costs, faster project completion, and minimal ongoing maintenance.

Installation Cost Factors

The cost of ground screws varies based on several factors, including the type of ground screw, its size, the intended application, geographic location, and any additional installation or engineering requirements-46.

For smaller ground-mount photovoltaic systems, solar installers may not need to spend money on a soil engineering analysis and the cost to permit the design separately, further reducing project costs-. Ground screws offer lower torque when driving them into the soil and are less likely to break in harder ground, reducing equipment wear and replacement costs-.

Lifecycle Cost Advantages

Beyond initial installation, ground screws offer substantial long-term cost advantages. The galvanized steel construction provides corrosion resistance that extends the foundation lifespan to 50 years or more with proper anti-corrosion coatings-6. This durability eliminates the maintenance and replacement costs associated with concrete foundations that may crack, settle, or degrade over time.

Ground screws also offer 30–40% lower lifecycle costs than concrete piles, with zero curing time making them ideal for time-sensitive projects-6. For large-scale solar farms, these cumulative savings can amount to millions of dollars over the project’s lifetime.

4. 2023 Industry Certifications and Standards

The maturation of the ground screw industry was marked by significant certification achievements in 2023. One of the most notable developments was the approval of ICC Evaluation Service AC443 for Screw Foundation Systems in February 2023-36.

ICC-ES AC443 Certification

AC443 establishes guidelines for the evaluation of allowable load and deformation capacities of screw foundation systems used to transfer axial compression, axial tension, and lateral loads from supported structures to surrounding soil-36. This standard provides a rigorous framework for engineers and installers to ensure that ground screw foundations meet code requirements across the United States.

ISO and International Standards

Ground screws manufactured for solar applications typically comply with ISO 1461:1999 specifications for hot-dip galvanizing, ensuring consistent quality and corrosion protection-12. Manufacturers conduct comprehensive mechanical checking calculations, software simulations, and third-party stress tests to verify product performance-12.

Static load tests, compression tests, tensile tests, and lateral pressure tests are performed to evaluate the compression resistance, stability, and durability of ground screw products-12. These rigorous testing protocols provide confidence to solar project developers and engineers.

Building Code Compliance

Ground screw systems are designed to comply with recognized building codes including ASCE 7, the International Building Code, and Eurocode standards-14. This compliance simplifies permitting and inspection processes for solar projects, reducing administrative delays and costs.

5. Leading Ground Screw Manufacturers and Suppliers

The ground screw market in 2023 featured a diverse range of manufacturers and suppliers catering to the growing demand for solar mounting solutions.

Global Industry Leaders

The Schletter Group, a global leader in solar mounting systems development and manufacturing, achieved a remarkable 162% year-on-year increase in revenue in its ground-mount segment during the third quarter of 2023, reaching approximately €50 million-55. This growth was driven by increased tracker installations and large fixed-tilt orders from Germany (105 MWp), the Dominican Republic (50 MWp), Türkiye (20 MWp), China, and South Korea-55.

Chinese Manufacturers

China remains a dominant force in solar mounting system manufacturing. In 2023, the top 15 Chinese solar mounting system manufacturers included ALV Solar (Xiamen), Guoqiang Singsun Energy, ATEC Group, Trina Solar, and Arctech-59. These companies offer comprehensive product portfolios including rooftop, ground-mounted, carport, and agricultural photovoltaic mounting systems.

Grace Solar emerged as a notable supplier of helical ground screws manufactured from Q235 standard carbon steel with hot-dip galvanized finishing-11. Their products feature flange connections that enable easy disassembly, high connection strength, and adjustability for various geological environments-11.

Innovative Manufacturers

StopDigging, a Swedish company, established itself as a leading innovator in sustainable foundation solutions, operating globally in European markets, North America, Australia, and New Zealand with over 130 authorized installer partners-44. The company received BBA certification in the UK, validating its ground screw systems as a credible alternative to traditional groundworks and concrete foundations-64.

In India, the top mounting structure suppliers in 2023 included Strolar Mounting Systems, Goodluck India, Raydean Industries, and Arctech-. Strolar accounted for 18.5% of the total capacity supplied in the first half of 2023, offering both roof and ground mounting solutions-.

6. Case Studies: Real-World Solar Installations Using Ground Screws

Lilford Estate Solar Farm, United Kingdom

In 2023, a transformative solar project was completed at the historic Lilford Estate in Northamptonshire, United Kingdom. The project, which spans one mile in width, utilized StopDigging ground screws to anchor solar panels securely to the ground-64.

Instead of traditional concrete foundations, which can be harmful to the environment, the project opted for ground screws to reduce the carbon footprint and make installation and maintenance easier-64. The installation required 714 ground screws, making it one of the largest solar farms in the region and producing substantial clean energy-64.

The eco-friendly choice aligns with the property owners’ commitment to preserving the natural beauty of the local landscape. Ground screws require minimal disturbance to the soil and offer the flexibility of reusing the land for other purposes in the future-64.

German Solar Tenders

Germany’s 2023 solar tender process demonstrated the growing preference for ground screw foundations, with 85% of winning bids mandating their use-6. This regulatory preference reflects the technology’s proven performance advantages, including superior wind load capacity and terrain adaptability.

UK Solar Farm Adoption

In the United Kingdom, 90% of solar farm projects in 2023 adopted ground screws for their mounting systems, cutting concrete consumption by over 20,000 tons per project-6. This widespread adoption demonstrates the technology’s maturity and acceptance among solar developers and installers.

7. Future Outlook for Ground Screw Solar Mounting Systems

The future of ground screws for solar panel mounting appears exceptionally bright, driven by several converging trends.

Market Growth Projections

The International Energy Agency forecasts that global solar capacity will reach 5,800 GW by 2030, with 70% requiring ground-mounted support systems-6. This massive expansion in solar infrastructure will drive corresponding demand for efficient, sustainable foundation solutions.

The global ground screw market is projected to maintain a healthy growth rate of approximately 7–8% through 2030, supported by rising demand from the renewable energy industry and the broader shift toward environmentally responsible building methods-.

Technological Innovations

Advancements in automation and materials science are further enhancing ground screw performance. Automated installation robots achieving ±2mm precision and high-strength alloys with 550 MPa yield strength have boosted ground screw capabilities-6.

Sweden’s ScrewFast launched a smart ground screw system with integrated stress sensors that reduces maintenance costs by 70%-6. Such innovations point toward an increasingly sophisticated ground screw market.

Sustainability Drivers

The global construction industry faces stringent carbon emission regulations that favor low-carbon foundation alternatives. Ground screws, with zero concrete usage, over 95% recyclability, and carbon-free installation processes, are positioned as a core solution for sustainable infrastructure-6.

Integration with Modular Construction

Ground screws align perfectly with modular building requirements, offering excavation-free installation and plug-and-play functionality-6. Modular construction is projected to account for over 35% of ground screw demand through 2030-6.