What are "balance of system" (BOS) components?

Balance of system (BOS) components refer to all the additional components and equipment required for a solar photovoltaic (PV) system to function effectively, excluding the solar panels and the inverter. These components are essential as they support the overall system's performance in various ways.

The BOS typically includes items such as mounting systems, electrical wiring, breakers, charge controllers, safety devices, and monitoring equipment. Each of these components plays a crucial role in ensuring that the solar energy generated is transmitted safely and effectively to the electrical grid or the site’s electrical systems.

By understanding the definition of BOS components, one can appreciate the complexity and integration required in a solar energy system beyond just the solar panels and inverter. This holistic view is necessary for designing efficient solar energy systems that comply with safety and operational standards.