Quick Answer
A single pole mount may not be sufficient for larger solar arrays, as they tend to require more structural support to maintain stability and prevent damage from wind loads. The pole's height and weight capacity can become limiting factors. A single pole mount typically supports arrays up to 5 kW in size. ---
Determining Pole Size and Capacity
When designing a solar ground mount pole, it’s essential to consider the array’s size, wind resistance, and snow load. As a general rule, a single pole mount can support arrays up to 5 kW in size, with a maximum height of 12-15 feet (3.6-4.5 meters). For larger arrays, a dual or triple pole configuration is often required to provide additional support and stability.
Calculating Wind Loads and Snow Load
To ensure the pole’s capacity is sufficient, calculate the wind loads and snow load for your location. Wind loads can be estimated using ASCE 7-16, while snow load can be determined using ASCE 7-16 or local building codes. For example, a 10 kW array in a region with high wind speeds (e.g., 120 mph) and moderate snow loads (e.g., 20 psf) may require a dual pole configuration with a minimum height of 18 feet (5.5 meters).
Choosing the Right Mounting Hardware
Select mounting hardware that matches the pole’s capacity and the array’s size. Look for hardware with a high weight capacity, such as 3/4" or 1" galvanized steel or aluminum components. Consider using adjustable clamps to accommodate different module sizes and configurations. When selecting a mounting system, follow the manufacturer’s guidelines to ensure proper installation and maximum performance.
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