What Is a PV Mounting Base?
Screw piles, also known as helical piles or ground screws, are a modern foundation alternative to traditional concrete. They are steel pipes with one or more helical plates (blades) near the tip, which are rotated into the ground to support the solar racking structure. This method eliminates the need for excavation, concrete mixing, and curing time.
Flanged Helical Ground Pile
The installation height is adjusted by bolting the flange to the upper support structure, making it suitable for uneven terrain or projects requiring precise mounting heights. Provides strong rigid connection for utility-scale solar farms and tracking systems.
Screw Pile Without Flange
Fixed directly via threaded nuts, offering lower cost and easy height adjustment. Ideal for single-pile PV mounting structures and cost-conscious distributed solar projects.
U Type Ground Screw
Connected via a U-shaped plate, this type is designed for quick, secure fixing of wooden posts and structures. Commonly used for fences, barriers, and temporary fencing. It offers easy installation and firm connection.
Why Choose Screw Piles for Your Solar Project?
- No Concrete, No Curing – Install and mount rails immediately. Save weeks of project time.
- Cost-Effective – Lower material and labor costs compared to concrete foundations.
- All-Weather Installation – Work continues rain or shine. No weather-related delays.
- Minimal Site Disturbance – No excavation, no soil disposal. Eco-friendly and reversible.
- Adaptable to Various Soil Types – Suitable for sand, clay, gravel, rocky terrain, and even swampy areas.
- High Load Capacity – Helical blades provide strong pull-out and compression resistance.
- 25-Year Service Life – Hot-dip galvanized surface ensures long-term corrosion protection.
- OEM/ODM Ready – Custom lengths, diameters, and coatings available per project requirements.
Technical Parameters
| Material | Q235B / Q355B Carbon Steel |
| Surface Treatment | Hot-Dip Galvanized (80–100μm) |
| Pile Body Diameter | 76mm, 89mm, 114mm, etc. |
| Length | 1,200mm – 3,500mm (custom up to 6,000mm) |
| Wall Thickness | 2.0mm – 5.0mm |
| Flange Diameter | 200mm / 220mm (custom available) |
| Pull-Out Resistance | Customized per project |
| Wind Load Capacity | Up to 60m/s (customizable) |
| Snow Load Capacity | Up to 1.4–1.6 kN/m² (customizable) |
| Service Life | 25+ years |
Production Process – Screw Piles Technical Parameters
Step 1: Cutting
Steel pipes are cut to specified lengths with precision.
Step 2: Heating
Pipe ends are heated to soften for forming.
Step 3：Swaging
The heated end is tapered for easier ground penetration.
Step 4：Drilling
Mounting and positioning holes are drilled per drawings.
Step 5: Welding – Flange
Flange plates are welded to the pipe top.
Step 6: Welding – Helical Blades
Helical blades are precisely welded at designated positions.
Step 7: Hot-Dip Galvanized
Piles are hot-dip galvanized for 25+ year corrosion protection.
Step 8: Packaging
Finished piles are packed, labeled, and ready for shipment.
Custom Solar Panel Mounts Options
You can flexibly customize the material, coating, length, height, width, thickness, style, and color of the rooftop photovoltaic bracket.
Material
Common material options include aluminium alloy, stainless steel, and galvanized steel, all sourced from reputable domestic suppliers. The material type can be customized to match specific environmental conditions and structural load requirements.
Coating
A broad selection of anti-corrosion coatings is available, including hot-dip galvanizing, zinc-aluminium-magnesium, spray painting, and baking paint, to suit different environmental conditions.
Style
The bracket structure is sturdy and durable, with customizable design options to fit project needs, and offers a service life of up to 25 years.
Thickness
Thickness can be customized to accommodate various load-bearing requirements across different installation sites.
Height
Height can be flexibly adjusted, with our technical team providing professional guidance to meet specific site clearance or elevation requirements.
Color
Multiple spray-paint colors are offered, allowing the system to blend seamlessly with surrounding environments or architectural aesthetics.
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