What Are Common Mistakes When Installing a Pole-Mounted Solar Array?

Poor Pole Installation and Structural Support

When installing a pole-mounted solar array, it’s crucial to ensure the pole is level and securely anchored to the ground. A minimum of 12 inches of concrete and 2-3 feet of anchor rods are recommended to prevent pole tip-over and minimize the risk of damage to the structure and surrounding property. A tilt of 30-45 degrees is typical for pole-mounted arrays to optimize energy production while keeping snow and debris off the panels.

Inadequate Wiring and Grounding Practices

Adequate wiring and grounding are critical to ensure safe and efficient operation of the solar array. Use 10-gauge or larger wire for the array’s positive and negative leads, and ensure all connections are secure and well-insulated. Grounding rods should be driven into the earth at least 8-10 feet away from the pole, and the ground wire should be sized according to local electrical codes (typically 6-gauge or larger). A bonding jumper is also required to connect the grounding system to the inverter’s frame.

Array Design and Mounting Considerations

Pole-mounted solar arrays typically have a shorter span than ground-mounted arrays, which can limit the number of panels that can be mounted. Consider the array’s design and mounting configuration to ensure it can support the weight of the panels and withstand wind and snow loads. A minimum of 1-inch pipe or tubing is recommended for the pole, and the array’s mounting hardware should be rated for the wind speed and snow load in your area.