How to choose foundation for ground mounting system？Screw or Concrete？

When it come to chooose foundation for ground mounting system for solar panels or other structures, people usually have a question, what’s difference between screw foundation and concrete foundation? What should I choose? Today PV-Mounts will assisting you find the answer.

The choice between a screw foundation and a concrete foundation primarily depends on factors such as soil conditions, installation time, ease of removal, and cost. Here’s a breakdown of the key differences between the two:

1.Installation Process:

• 🌞Screw Foundation: This involves driving metal screws or helical piles into the ground using specialized equipment. The screws penetrate the soil until they reach a stable depth or load-bearing layer.

• 🌞Concrete Foundation: This method requires digging holes in the ground and pouring concrete into forms to create a solid base for the mounting system. The concrete needs time to cure and harden before the structure can be installed.

2.Soil Conditions:

• 🌞Screw Foundation: Screw foundations are well-suited for a variety of soil types, including rocky or sandy soils. They can adapt to uneven or sloping terrains and provide good stability.

• 🌞Concrete Foundation: Concrete foundations are generally suitable for stable soil conditions and may require additional measures (e.g., soil testing, compacting, reinforcement) in areas with expansive or soft soils.

3.Installation Time:

• 🌞Screw Foundation: The installation of screw foundations is typically faster compared to concrete foundations. The specialized equipment used to drive the screws allows for efficient and swift installation, saving time and labor costs.

• 🌞Concrete Foundation: Concrete foundations often require more time due to the need for excavation, formwork, pouring, and waiting for the concrete to cure before proceeding with the installation of the mounting system.

4.Removal and Reusability:

• 🌞Screw Foundation: Screw foundations can be easily unscrewed and removed from the ground, making them reusable and leaving minimal impact on the site. This feature is particularly advantageous if you plan to relocate or reconfigure the ground mounting system in the future.

• 🌞Concrete Foundation: Concrete foundations are typically permanent and challenging to remove. If you anticipate the need for relocation or future changes, a concrete foundation may not be the most flexible option.

5.Cost:

• 🌞Screw Foundation: The cost of screw foundations can vary depending on factors such as the length and number of screws required, soil conditions, and installation equipment. In some cases, screw foundations may be more cost-effective than concrete foundations due to reduced installation time and labor.

• 🌞Concrete Foundation: Concrete foundations involve more materials and labor-intensive processes, which can make them more expensive than screw foundations. However, costs can vary significantly depending on factors like the size, depth, and reinforcement requirements of the foundation.

It’s important to consult with our professional engineer or contractor experienced in ground mounting systems to assess the site conditions, evaluate the project requirements, and determine the most suitable foundation option based on your specific needs.

As one of professional solar racking system manufacturers in China, Xiamen PV-Mounts provides free mounting solution consults, marketing information shared, free sample, free price with bom list and free drawing once you request.