Four-Helix Ground Screw for Solar Mounting

Xiamen Honor Energy's four-helix ground screw is built as a heavy-duty foundation for solar ground-mount systems. Unlike common single- or double-helix piles, it features four sets of helical blades welded in stages along the shaft. Each stage compacts the surrounding soil as it penetrates, creating a multi-level anchoring effect that delivers noticeably higher pull-out and compression capacity. Installation uses a dedicated driver to screw it into the ground; the top flange bolts directly to the mounting post—no excavation, pouring, or curing needed. For soil types, it performs best in sandy loam, silty clay, and backfill. Hard clay or gravelly sites work with pre-drilling; pure rock and permafrost are not recommended.

Advantages

1. Higher load capacity: Four helix stages anchor in layers, delivering significantly higher pull-out resistance than single or double helix—ideal for high wind/snow loads.

2. More stable penetration: Multi-stage blades compact soil progressively, reducing deflection in alternating soft/hard strata.

3. Corrosion-resistant: Hot-dip galvanizing averages 65 μm+, handling coastal salt spray and wet soil; rated for 25+ years.

4. Fast installation: A dedicated driver installs one in 2-3 minutes; crews can do several hundred daily, and rails go up same-day.

5. Eco-friendly & recyclable: No construction waste; removable and recyclable at the end of the project, low land restoration cost.

Technical Specifications

FAQ

Q: Four-helix costs more than double—is it worth it? 

A: Depends on the project. For high wind/snow loads, softer soil, or strict settlement requirements, four-helix boosts pull-out capacity and may reduce the number of foundations needed—overall cost isn't necessarily higher. For small ordinary projects, double-helix is sufficient.

Q: Is it harder to drive in than single-helix? 

A: Yes, resistance is higher, so you need a driver with more torque. But the staged blades cut in progressively—smoother than you'd expect. With matched equipment, speed is similar to double-helix.

Q: Does helix spacing matter? 

A: Yes. Too close disturbs the soil and reduces capacity; too far apart weakens the staged anchoring effect. We match spacing to soil type and shaft diameter before shipping—standard spacing is field-proven, and custom spacing is available for special ground conditions.