Npower is a wholly owned subsidiary of RWE Group, a German company. RWE Npower is one of the largest suppliers of gas and electricity to homes and businesses in the UK, with around 3.5 million customers. It also produces around 10% of the electricity used in the UK.
Npower was created when it combined the former electricity and gas supply business of MEB, Calortex, MEB Powerline, National Power Energy Direct and Independent Energy, Yorkshire Electricity and Northern Electric and Gas.
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Npower customer satisfaction survey results
|Area of performance||Star rating|
Which? customer score
|Value for money||
|Helping you save energy||
Npower customer score
In September and October 2014 we surveyed 9,404 UK adults, who pay for their household energy, about their experience with their gas and electricity suppliers.
Customer scores are based on overall satisfaction and likelihood of recommending to a friend. This survey is the largest one of its kind conducted in the UK.
For a full round-up of the Which? Switch energy satisfaction survey results, see our customer satisfaction survey results page.
Npower fuel mix disclosure
All energy suppliers have to provide information about the mix of fuels they use to generate energy supplied to gas and electricity customers and its environmental impact.
Npower fuel mix
Natural gas: 51%
* Wind, hydro and solar power.
Customer service for existing customers - 0800 316 3375
Phone calls: Calling Npower on a 0800 number is normally free when you call from a land-line but charges may vary if you use a mobile.
Contact Which? Switch by phone
You can call us on 0800 410 1149 or 01259 220 235.
Tired of poor customer service from your energy supplier? See how customers rated 22 of the UK's gas and electricity suppliers in 2015.
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