What must be ensured when interconnecting PV systems with utility service?

When interconnecting photovoltaic (PV) systems with utility service, it is crucial to ensure adherence to utility requirements and National Electrical Code (NEC) regulations. This is primarily because utility companies have specific standards and protocols that must be met to ensure safety, reliability, and efficiency in the interconnected system. These requirements might include compliance with metering specifications, disconnect devices, and the type of inverter used.

Additionally, the NEC provides clear guidelines regarding the safe installation and operation of electrical systems, including PV systems. These regulations cover aspects such as wire sizing, grounding, overcurrent protection, and equipment ratings. Meeting these requirements is essential not only for the safety of the system but also for compliance with legal standards when connecting the PV system to the utility grid.

While local zoning laws may play a role in where and how a PV system can be installed, they do not directly influence the technical requirements for interconnection. Energy monitoring systems, while useful for tracking PV system performance, are not mandatory for interconnection. Lastly, the requirement for conductors is not limited to only rigid types; various conductor types can be used if they comply with NEC standards.