The balance of system ( BOS ) is a component of a photovoltaic system other than the photovoltaic panels .  This includes wiring , switches, a mounting system , one or many solar inverters , a battery bank and battery charger .
Other optional components include, renewable energy credit revenue-grade meter, maximum power point tracker (MPPT), GPS solar tracker , Energy management software , solar concentrators, solar irradiance sensors, anemometer , or task-specific accessories designed to meet Specialized requirements for a system owner. In addition, CPV systems require optical lenses or mirrors and sometimes a cooling system.
In addition, ground-mounted, large photovoltaic power station require equipment and facilities, such as grid connections, office facilities, and concrete.  Land is sometimes included as part of the BOS as well.
- Balance of plant
- Jump up^ “Balance of System” . Solar Energy Technologies Program . US Department of Energy . 5 January 2006. Archived from the original on 4 May 2008 . Retrieved 7 May 2008 .
- Jump up^ “Life Cycle Inventories and Life Cycle Assessments of Photovoltaic Systems” . IEA-PVPS (published 13 March 2015). January 2015. p. 18. Archived from the original on 22 March 2015.