E.ON Next is a fully regulated, Ofgem-licensed energy supplier and a legitimate business backed by the E.ON Group, one of Europe's largest energy companies. However, it has accumulated a significant volume of customer complaints — particularly around billing errors, smart meter issues, and poor customer service — placing it among the more troubled mid-tier suppliers on Trustpilot. It is safe to use but consumers should approach with realistic expectations and document all communications.
E.ON Next Energy Limited is a UK-registered retail energy supplier, operating under Companies House number 09263424 and fully licensed by Ofgem to supply both gas and electricity to domestic and business customers across Great Britain. The brand launched in 2020 as E.ON's next-generation retail arm, absorbing E.ON UK's existing customer base and later taking on customers from collapsed suppliers including Npower's domestic book. It is ultimately owned by E.ON SE, a German energy giant listed on the Frankfurt Stock Exchange, giving it substantial financial backing.
Despite its regulatory legitimacy and corporate pedigree, E.ON Next has developed a poor reputation for customer service. Its Trustpilot score sits in the 1.8–2.2 range — one of the lower scores among major UK suppliers — with recurring complaints centring on billing errors, unexplained direct debit increases, delays in refunding credit balances, and problems with smart meter functionality. Citizens Advice has also ranked E.ON Next below average in its independent supplier league tables. The Energy Ombudsman does accept complaints against E.ON Next, and customers who have exhausted the internal complaints process are entitled to escalate for free.
UK consumers choosing E.ON Next should take meter readings on the day they switch, keep written records of all correspondence, and monitor direct debit levels against actual usage — particularly in winter. If a billing dispute arises, raise a formal complaint in writing immediately, as this starts the clock on the eight-week window before you can escalate to the Energy Ombudsman. E.ON Next is a legitimate, regulated supplier and your energy supply itself is unlikely to be at risk, but customer service quality means you should be prepared to be proactive if problems emerge.