British battery energy storage systems (BESS) owner and operator Harmony Energy Income Trust plc (<a href="https://www.londonstockexchange.com/stock/HEIT/harmony-energy-income-trust-plc/company-page" target="_blank">LON:HEIT</a>) announced today that it has commissioned two BESS projects with a combined capacity of 148.5 MW/297 MWh in the UK.