Commissioning

Commissioning is the final step in a solar installation where the system undergoes safety testing and verification before being officially activated. This process is typically performed by your utility company and/or a certified inspector to ensure the system meets all electrical codes and is safe to operate.

During commissioning, inspectors verify that all wiring is correct, grounding is proper, the inverter is functioning, and the system meets local building codes and the National Electrical Code (NEC). For grid-tied systems, the utility also installs or reprograms your electric meter to accommodate two-way power flow (for net metering) and verifies that anti-islanding protection is working — meaning your system will automatically shut off if the grid goes down, protecting utility workers from unexpected electrical backfeed. Commissioning typically takes 1–4 weeks after the physical installation is complete, depending on your utility’s scheduling and inspection process. Once commissioning is finished and your Permission to Operate (PTO) is granted, your solar system is officially live and you can start generating electricity and earning credits.