The leader of the left-of-centre Labour Party, Jeremy Corbyn, has said his party will "act to protect the future of the planet, with social justice at the heart of our environment policies".
Renewables contributed 24.6% to the UK's electricity generation in 2015, according to government figures.
The policies would form part of the next election manifesto for the party. However, the next general election in the UK is not due until 2020.
Corbyn said there would be more than 300,000 jobs in renewable energy due to long-term investment and a "comprehensive industrial strategy".
The party leader also said he would increase local communities involvement in renewables and "allow local authorities to set annual renewables deployment targets".
Fracking would face being banned. Corbyn said he wants to keep 80% of known fossil fuel reserves in the ground, in order to slow down global warming.
Corbyn is currently facing a leadership challenge from within his party, but is odds-on favourite to win. He remains unpopular with his fellow Labour MPs but has a strong grassroots following in the party.