Quick Answer
When installing micro-inverters, regulatory considerations include compliance with local building codes, interconnection standards set by utilities and the National Electric Code (NEC), and obtaining necessary permits and inspections.
Compliance with Local Codes and Standards
Micro-inverters must meet local building codes and standards, which vary by region. For example, the California Energy Commission (CEC) has specific requirements for solar photovoltaic (PV) systems, including maximum system size and interconnection standards. Homeowners and installers must ensure that micro-inverters meet these local requirements. The NEC (Article 690) also outlines specific requirements for PV systems, including overcurrent protection, grounding, and disconnecting means.
Interconnection Requirements
Interconnection requirements vary by utility, but generally involve meeting specific standards for system design, safety, and performance. The IEEE 1547 standard outlines the technical requirements for interconnecting PV systems to the grid. Homeowners and installers must ensure that micro-inverters meet these interconnection requirements to avoid potential issues or fines. For example, the City of Los Angeles requires a single point of interconnection (SPOI) for all PV systems, which may involve the use of a main inverter or other equipment.
Permitting and Inspections
To ensure compliance with local regulations, homeowners and installers must obtain necessary permits and pass inspections. The permitting process typically involves submitting plans and specifications for review, followed by a site inspection to verify compliance. Homeowners and installers should work with a licensed electrician or solar installer to ensure that micro-inverters meet local code requirements and pass inspections. For example, the City of San Francisco requires a permit for all PV systems, which involves submitting plans and specifications for review by the Department of Building Inspection.
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