Mr Davey, who is seeking the Lib Dem nomination for his former seat of Kingston and Surbiton, likened the £2.3bn agreement to “selling off the family silver”.
Ed Davey said:
“Selling the Green Investment Bank is environmentally irresponsible, and on the eve of an election is politically dubious. The government clearly hopes to avoid parliamentary scrutiny.
“The Toxic Tories are getting closer to Donald Trump every day and their record on renewable energy since 2015 has been pathetic. Only the Liberal Democrats are fighting for the environment.”