Harmony Energy Income Trust plc is a United Kingdom-based investment company. The Company invests in commercial-scale energy storage and renewable energy generation projects, with an initial focus on a diversified portfolio of battery energy storage systems (BESS) located in Great Britain. Its investment objective is to provide an attractive and sustainable level of income returns, with the potential for capital growth, by investing in commercial-scale energy storage and renewable energy generation projects, with an initial focus on a diversified portfolio of BESS located in Great Britain. The Company may invest in operational, under-construction or shovel-ready projects, and may also provide development finance to pipeline projects. It owns the Bumpers Project with a capacity of 99 megawatts (MW)/198-megawatt hours (MWh), located in Buckinghamshire. It also owns three shovel-ready pipeline projects with a capacity of 181.9 MW/363.8 MWh. Its portfolio includes nine BESS projects.