United Utilities has installed a 2MW battery alongside solar power at a treatment works in Preston.
The water company said the batteries will improve site resilience, enable it to avoid cost and earn grid stabilisation revenues.
Water sector CEOs have committed the industry to decarbonise by 2030. This will require significant investment over the next few years.
“This is exactly the sort of innovation water companies need to be embracing if we are to meet the sector’s goal of zero net carbon emissions by 2030,” said UU head of renewables, Steve Slavin.
Zenobe provided the batteries.
Britain’s biggest listed water company, United Utilities has invested around £100m in renewables since 2015.