Taiwan AU Optronics (AUO) has launched an energy storage system (ESS) PowerLegato for commercial and residential use after being certified by German testing house TÜV Rheinland.
The self-claimed high density ESS provides a 48V lithium-ion battery produced in Japan and features over current, temperature, voltage and undervoltage protection. The system is available in 2.4kWh, 4.8kWh and 7.2kWh. It supports hybrid energy inputs and outputs and has the option to choose between PV DC and grid AC sources.
The system can also operate fully stand-alone off grid in Germany as well as the UK and can serve as emergency backup, according to the company. It also fulfills the qualifications for the Japanese S-mark incentive programme, allowing owners to receive subsidies.
According to AUO, the ESS can store 25% more energy per kg than its competitors.
The residential version entered the European market in 2013 and was awarded for its design by iF and Reddot.
German research centre Karlsruhe Institute of Technology (KIT) recently warned about safety issues of non-certified residential ESS.