Do solar PV systems need to be grounded?

Key points from the NEC: The code requires all non-current-carrying metal parts of the solar PV system to be grounded. It specifies the minimum size of grounding conductors (more on this later). The NEC also outlines requirements for grounding electrodes (like ground rods) and how they should be installed.

Do I need a grounding electrode for a PV array?

While a separate grounding electrode system is still permitted to be installed for a PV array, per 690.47 (B), it is no longer required to be bonded to the premises grounding electrode system. In PV systems with string inverters, the equipment grounding conductor from the array terminates to the inverter’s grounding bus bar.

What is a ground-mounted solar PV system?

a ground-mounted system. Ground-mounted solar PV panels are fixed to an A-frame or other purpose-built framework in much the same way as flat roof-mounted solar PV panels. The main diference is how the frame is fixed to the ground as the characteristics of a roof and the ground are very diferent.

What type of fixing system is used for solar PV panels?

The type of fixing system used will depend on whether the solar PV panels are going to be: ground mounted. Solar PV panels can be retrofitted onto an existing roof, on top of the tiles or other roofing materials, using roof anchors (also called roof-hooks or brackets), mounting rails and clamps.

What is a solidly grounded PV array?

A solidly grounded PV array, as permitted, in 690.41 (B), as permitted, per 690.41 (A) (5), is a special case where the PV array contains no more than two source circuits, i.e., two strings of modules, the PV system circuitry is not located in or on a building, and the system is solidly grounded.

What are the technical aspects of a PV power plant?

Technical areas addressed are those that largely distinguish PV power plants from smaller, more conventional installations, including ground mounted array configurations, cable routing methods, cable selection, overcurrent protection strategies, equipotential bonding over large geographical areas, and equipment considerations.