Is there a lightning risk for solar installations near trees?

Tree Lightning Strike Hazard

Trees can attract lightning due to their height (typically above 10 meters or 33 feet) and moisture content. When a tree is struck by lightning, the electrical discharge can travel through the tree and potentially strike the nearby solar installation, causing damage to the panels and potentially starting a fire.

Lightning Protection Techniques

To mitigate the risk of lightning strikes near trees, consider implementing the following techniques:

• Install a lightning arrestor or surge protector near the solar panel array. This device can direct the electrical discharge to the ground safely, minimizing damage to the solar panels.
• Ensure the solar panel array is at least 10 meters (33 feet) away from the tree to reduce the risk of a direct lightning strike.
• Use a grounding system that is designed to meet the local electrical codes and standards, such as the National Electric Code (NEC) in the United States.

Tree Management and Lightning Rods

While a tree lightning rod is not a substitute for a proper lightning protection system, it can provide some protection. A tree lightning rod is a metal rod that is installed in the tree to attract lightning strikes. However, this is not a reliable method of lightning protection and should not be relied upon as the sole means of protection.

A better approach is to work with a certified arborist to prune trees that are close to the solar installation, reducing their height and risk of attracting lightning.