Trina Storage, part of Chinese group Trina Solar Co Ltd (<a href="http://english.sse.com.cn/markets/equities/list/overview/?COMPANY_CODE=688599&STOCK_CODE=688599" target="_blank">SHA:688599</a>), said that it has commissioned a 9.3-MWh battery energy storage system (BESS) in Avetrana, Italy, completing its first utility-scale project of this kind in the country.