The company, which has 3.3 million households on its books, said it was responding to growing demand for greener electricity.
However, it was clear from the announcement that it remains some way off producing enough renewable energy of its own to meet its customers' needs.
E.ON said that around half of its output would come from its own estate of five offshore wind farms, 16 onshore sites and three biofuel facilities - with support from around 16 other independent sites via contracts.
It said the rest of the power would come from other sources - which can include the likes of natural gas and coal-fired power - but said they would be offset through the purchase of Renewable Energy Certificates.
AdvertisementThe certificates, the German-owned company said, guarantee that an equivalent amount of renewable electricity is generated to the amount supplied.
The industry is facing challenges on many fronts as demand for green electricity grows ahead of a future littered with targets to help battle climate change - with enough capacity to power an electric transport infrastructure.
Renewable Energy Creates 5 Times More Jobs Than Fossil Fuels. An analysis done by the Department of energy in USA has discovered that throughout the nation, clean energy jobs outnumber fossil fuel jobs by more than 2.5 to 1. In fact, when comparing clean energy jobs to those of coal and gas, the renewable energy sector has created 5 jobs to every 1 job in the fossil fuels industries.
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However, he says that Serbia’s traditional conservatism and influential coal lobby will mount opposition to shutting down coal mines and TPPs. He believes that it is not fully understood what kind of potential lies in energy transition using renewables technologies, energy efficiency, and smart technologies for the creation of highly sophisticated and lucrative jobs – the only way to speed up economic growth.
Coal currently accounts for just 10% of total electricity output.
It is hoped offshore wind will provide a third of the country's electricity by 2030 - up from the current 7%.The government wants new nuclear plants to help fill some of the void but the private sector is running scared of investment, with two major projects falling apart in the past year leaving just Hinkley Point C in Somerset as the only scheme currently under construction.
Of the other big six suppliers, only ScottishPower has committed to a greener source of generation, through wind only.
Solar power isn’t just a daytime deal – power from the sun’s rays can be stored in salt and used at night too. A power plant in Spain soaks up sun by day and pumps out 7 hours of power to the surrounding area by night.
It sold its last gas-fired power assets to Drax in 2018 and has since pledged a £2bn investment in renewables.E.ON UK chief executive, Michael Lewis, said: "Climate change is the defining issue of our era, and one that energy customers are increasingly concerned about."We believe large-scale action can make significant change possible and we're committed to playing a leading role and setting an example for others to follow, that's why we're providing all of our residential customers with 100% renewableelectricity as standard - a change at a scale never seen before in Britain."
Energy expert at the switching site uSwitch.com, Rik Smith, said: "Today's announcement applies to all E.ON customers, including those on poor value standard tariffs.
"But green energy deals now compete on price with their more carbon-intensive counterparts, so those households who are on a standard deal should shop around to see how much they could save by switching.
"The cheapest green plan on the market costs less than £900 a year, a whole £380 cheaper than E.On's standard plan."