The bank's cleantech incubator, formed with the US Department of Energy three years ago, will also expand its interest to transport, sustainable agriculture and the microgrid.

Financial services firm Wells Fargo invested an additional $20m in its $10m cleantech and startup incubator, the Wells Fargo Innovation Incubator (IN²), on Tuesday.

Launched by Wells Fargo and the US Department of Energy’s National Renewable Energy Laboratory (NREL) in 2014, IN² aims to accelerate the development of early-stage cleantech, and initially concentrated on technology that could reduce the environmental impact of buildings.

Participants are eligible to receive up to $250,000 in non-dilutive funding from Wells Fargo as well as…