0844 381 9900 Calls cost £0.05 per minute plus your providers access charge. You must be at least 18 years of age and be the bill payer or have the bill payers permission to use this service. We are not affiliated with this or any other company listed on this website What is RWE Npower? RWE npower which has been trading as npower is a UK-based electricity generator, modulator and supplier of gas which supplies electricity to homes and businesses. …