The government has pledged spending of £7.6bn a year in real terms by 2020 on green energy measures.
Under the Levy Control Framework, spending on low-carbon electricity generation will triple from the current £2.35bn a year.
The government is targeting 30 per cent of electricity to come from renewables by 2020, from around 11 per cent today, to reduce dependence on traditional gas.
The measures are part of the Energy Bill, which will be introduced next week.
“[The decisions] will allow us to meet our legally binding carbon reduction and renewable energy obligations and will bring on the investment required to keep the lights on and bills affordable for consumers,” energy secretary Ed Davey said today.