Regardless of photovoltaic system voltage, all equipment, metal frames, module frames, and conductor enclosures must be grounded in accordance with 250.134 and 250.136.

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Grounding and bonding of PV equipment are safety requirements that apply no matter what the system voltage is. Exposed metal parts such as module frames, racking, and conductor enclosures can become energized if a fault occurs, so they must be bonded to the equipment grounding conductor and connected into the building’s grounding system to keep them at or near earth potential. This provides a low-impedance path for fault current, which helps ensure overcurrent devices will trip and protect people from shock.

The referenced code sections address how to connect and bond these metal parts to the grounding system, ensuring a consistent and reliable grounding method across the installation. Since this is a safety-based requirement for all PV installations, it is not restricted to high-voltage systems, and it isn’t left unspecified.