More building services companies are getting involved in energy management, which has led to partnerships with energy companies in some cases.
As a result, there are now 26 energy companies offering gas and/or electricity in the UK.
Here’s a look at some of the more unusual energy companies:
Woodland Trust Energy
Woodland Trust Energy is run by Ovo Energy and was launched in April 2013 with the promise of providing cheaper and greener energy.
Ovo Energy will donate to the trust, a woodland conservation charity.
Ecotricity is a small, environmentally focused UK energy company, founded in 1995.
In 2010, Ecotricity started to offer “green gas”, which is generated from food waste.
Ecotricity had the fewest unresolved complaints of all energy suppliers over the past several years, according to figures published by the supplier in December 2013 and October 2012.
Good Energy sources 100% of its electricity from renewables like solar, wind and water.
That means no fossil fuels, no nuclear and no carbon.
Good Energy also works with the National Trust to help it develop its own renewable energy generation projects, cut its energy use and inspire individuals and communities to do the same.