SMA Solar Technology AG is a German holding company engaged in the solar technology sector. It operates five divisions: Medium Power Solutions; Power Plant Solutions; Service; Zeversolar, and Railway Technology. Medium Power Solutions division covers the Sunny Boy, Sunny Mini Central, Sunny Island product families, as well as develops products for monitoring photovoltaic systems and energy management. Power Plant Solutions division covers the Sunny Central product family and focuses on PV plants with outputs from 500 kilowatts (kW) upwards. Service division covers the functional services related to photovoltaics. Zeversolar division covers the activities of Jiangsu Zeversolar New Energy Co Ltd and offers central inverters for Chinese market. Railway Technology division covers the activities of Railway Technology GmbH and its Brazilian subsidiary that manufacture converters (individual devices and energy supply systems) for railway coaches, trains and long-distance railway traffic.