Power-generating wind turbines are seen in a wind farm of BKW in Mont Soleil in the Jura region
Green energy is generating popularity in the UK, as Good Energy’s results show. Reuters

Renewable energy company Good Energy said customer numbers rose by almost a third in 2013 helping it report a 136% increase in pretax profit.

"We are out-performing Britain's energy market, with customer numbers rising 32 per cent as more than 100,000 households, businesses and renewable energy generators opt for Good Energy's electricity, gas and feed-in-tariff services," said chief executive Juliet Davenport.

The Wiltshire-based company, which uses 100% green electricity from natural sources, such as sun, rain and wind, said revenue had increased in the year to £40.4m from £28.2m the previous year helping its pre-tax profit more than double to £3.3m.

Although a relative minnow in the sector, Good Energy's results are an indication of the growing popularity of green energy providers as more Britons become increasingly dissatisfied with the so-called Big Six.

From 2012 to 2013, renewable energy generation in the UK rose by just under 6%.

"Our rapid customer growth, including from households generating their own power, demonstrates the growing appeal and value of renewable energy," added Devenport.