Gresham House Energy Storage Fund plc (<a href="https://www.londonstockexchange.com/stock/GRID/gresham-house-energy-storage-fund-plc/company-page" target="_blank">LSE:GRID</a>), a UK fund investing in utility-scale battery energy storage systems (BESS), expects an increase in 2024 operational portfolio revenues compared with 2023, driven by capacity growth and improving market fundamentals, following a low point in the first quarter of the year.