There is a range in estimates for total current demand for shore power, reflecting the lack of unified reporting on at berth fuel use. Estimates of current UK at berth vessel electricity demand range from 450 GWh to 1,250 GWh – reflecting different approaches to estimating energy use detailed below. Applying a typical emissions factor of 650g CO2/kWh for fuel oil to electrical power this equates to 290 ktCO2 to 813 ktCO2 annually for electricity use by vessels at berth in UK ports. Vessel electricity use is currently the overwhelming contributor to emissions at berth in the UK and elsewhere.
