An on-site solar photovoltaic (PV) system in London, UK has saved its operator 361 tonnes of carbon dioxide in nine months, the firm announced this week.

Installed in February 2016 and billed as the city’s largest solar retrofit to an existing building, the 1000 kW array provides power for Bywaters, a London recycling and waste management company. Bywaters said the amount of CO2 saved is 40 tonnes more than was predicted for the full year.

The 4000-panel solar array has now generated 700 MWh and provides most of the power for Bywaters’ Materials Recovery Facility, which processes 650,000 tonnes of waste material per year. Bywaters said the PV system is on track to deliver a return on investment within six years.

John Glover, Bywaters managing director, said: ‘Feasibility studies convinced us of the validity of using solar panels in the UK and we are already saving more carbon than anticipated.  As well as reduced energy costs, the solar panels are enabling us to operate more sustainably.’