Gresham House Energy Storage Fund plc announced that it has energised its Penwortham project, a 50MW/50MWh BESS just southwest of Preston, Lancashire (PESS). Plans to double Penwortham's capacity to 50MW/100MWh are well progressed and this is expected to be completed during the summer. The energisation of Penwortham takes GRID's operational capacity to 790MW /926MWh.