What systems are permitted to be either ungrounded or grounded?

Solar photovoltaic systems are permitted to be either ungrounded or grounded due to specific safety and design considerations in renewable energy applications. Grounding in photovoltaic systems can enhance safety by preventing electrical faults and ensuring proper functioning during system operations, but there are scenarios where ungrounded systems can be utilized for certain benefits, such as simplified fault detection and reduced ground fault currents.

This flexibility in grounding options allows designers and engineers to tailor the system to specific site conditions and requirements, balancing safety with operational efficiency. Additionally, regulatory standards and guidelines provide options for grounding methods in photovoltaic systems, enabling diverse installation practices based on the intended application and location.

Other systems, like heating, domestic power, and backup generator systems, have more stringent requirements that typically favor grounded configurations to ensure safety and reliability.