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

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About npower

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.The big six supplier also offers boiler services, including boiler repair and replacement.

The supplier is also one of just a few companies to have earned the Carbon Trust Award for sustainable management of energy, water and waste.

npower customer satisfaction

The results of our 2014 customer satisfaction awards:


npower came last in the 2014 Energy Awards with a score of 58%, although the supplier has made a slight improvement (1.5%) over last year.

This survey was conducted by YouGov between 17th and 27th October 2014 amongst 5,262 UK energy consumers (aged 18+). 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

In January of 2015, npower stated that it would lower prices for standard tariff customers by 5.1%. The price drop would be implemented 16 February.

Supplier Date effective Avg price change (%)

EDF Energy

11 Feb 2015 1.3%


13 Jan 2015 3.5%

British Gas

27 Aug 2015 5%


20 Jan 2015 4.8%


30 April 2015 4.1%%


16 Feb 2015 5.1%

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:

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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