Solar panels at Silloth mill

A new solar farm has been put in by Silloth dock. https://www.solarpowerportal.co.uk/news/abp_and_custom_solar_complete_250kwp_solar_farm_at_port_of_silloth 960 panels. Looking at the picture in the article they look to be max 2 square metres so 1920 square metres. At about 700 kWh per square metre solar irradiance that gives over 1 million kWh per annum, 4 times the figure in the article so some wrong assumptions on my part!