npower supplies gas and electricity to around 3.1 million customers in the UK.

npower, originally established as National Power in 1990 following the privatisation of the state-owned Central Electricity Generating Board, is now owned by RWE Group which incorporates Germany’s leading gas and electricity companies.

npower supplies gas and electricity to around 3.1 million customers and produces around 10% of the electricity used in the UK.

To compare all energy suppliers including npower and find the cheapest tariff for you click on the blue box to the right. To learn more about npower gas prices and electricty rates, keep reading:

npower customer satisfaction

The results of our 2013 customer satisfaction awards:

Overall satisfaction of 56.5%

npower achieved sixth place amongst the six major suppliers with an overall score of 56.5%.

This survey was conducted by YouGov online between 9 April and 13 September 2013.

A total of 5,057 UK energy customers took part in the survey. Customers were asked their opinions on a wide range of issues relating to satisfaction with their energy suppliers. The figures have been weighted.

Recent price changes and where npower rank

In October 2013, npower announced it would raise its prices by 10.4% on average for gas and electricity. npower rates increased on 1 December 2013 and hiked the average dual-fuel customer's bills by £139 per year.

In January 2014, npower announced its price rise reduction prompted by government's cuts to green levies. The big six supplier stated it would reduce the rise by about 2.6%, and that this cut would be effective 28 February 2014. That made npower tariffs' overall price rise roughly 7.8%, the highest of the big six for the 2013-2014 price rise season.

The table below shows which of the big six energy suppliers, including npower, last raised or dropped their prices, by how much and when:

Supplier Date effective Avg price change (%) Avg bill size*

EDF Energy

Jan 3 2014 3.9% £1,237


18 Jan 2014 3.7% £1,240

British Gas

Jan 1 2014 6% £1,265

Scottish Power

Jan 31 2014 5.3% £1,284


Mar 24 2014 4.2% £1,259


Feb 28 2014 7.8% £1,299

*Based on a medium energy user on a standard dual fuel tariff, paying on receipt of bill, with bill sizes averaged across all regions.

How do npower generate energy, their 'fuel mix'

The fuel mix for the year 1 April 2013 to 31 March 2014.

  • 31%Coal
  • 50%Gas
  • 2%Nuclear
  • 15%Green
  • 2%Other

Average from all UK suppliers

  • 34% Coal
  • 25.6% Gas
  • 21.6% Nuclear
  • 16.7%Green
  • 2% Other

Why we like npower

npower is part of the Accurate Bills Code of Practice, created by the industry trade group Energy UK, committing it to producing clearer bills that are easier for customers to understand.

npower's parent company, the RWE Group, is one of the five largest gas and electricity companies in Europe, and has over 16 million electricity customers and 8 million gas customers.

RWE npower renewables is one of the biggest wind-power and hydroelectric generators.

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