What are Common Code Violations in DIY Solar?

Improper Electrical Connections

When installing a DIY solar system, it’s easy to overlook critical electrical connections. One common mistake is using the wrong type or size of wire, which can lead to overheating, fires, or electrical shock. For example, using a 10-gauge wire to connect a 20A charge controller to a 12V battery can cause excessive current flow, resulting in overheating and premature failure of the charge controller.

Inadequate Grounding and Bonding

Another common code violation is inadequate grounding and bonding of the solar PV system. This includes failing to connect the system to a grounding rod, not using the required ground fault circuit interrupter (GFCI), or not bonding the system to the main electrical panel. Inadequate grounding and bonding can lead to electrical shock or fires. To avoid this, it’s essential to follow the National Electric Code (NEC) requirements for grounding and bonding, which include bonding the PV array to the main electrical panel and using a GFCI to protect against electrical shock.

Insufficient Fire Protection and Clearances

DIY solar installations often fail to meet local fire protection and clearance requirements. This includes failing to provide adequate clearances between the solar PV array and combustible materials, such as wood or flammable roofing materials. Insufficient clearances can lead to fires or damage to the solar system. To comply with local codes, it’s essential to follow the International Building Code (IBC) and the International Residential Code (IRC) requirements for fire protection and clearances, which include providing a minimum clearance of 3 feet between the solar array and combustible materials.