Octopus Energy vs E.ON Next

Octopus Energy and E.ON Next are the two suppliers most often put side by side by households comparing a digitally-run account with a large traditional firm. Octopus is majority owned by Octopus Group (UK), while E.ON Next is majority owned by E.ON SE of Germany¹. In the January 2026 Which? survey E.ON Next scored 66%, the highest-ranked of the traditional big firms that year, and was one of four Which? Recommended Providers alongside E (Gas & Electricity), Octopus Energy, 100Green and Sainsbury's Energy². Octopus took the Overall Customer Satisfaction award for big suppliers in the 2026 Uswitch Energy Awards³.

The size question has moved. Octopus closed the gap in the gas market to become the UK's largest energy supplier overall in March 2026, and the proposed E.ON acquisition of OVO was described as putting E.ON "neck and neck with the current heavyweight, Octopus"⁴. On collective switches, E.ON Next has been the recurring winner: it took the winning tariff in the April 2026, May 2026, June 2026 and September 2026 rounds of the Uswitch collective switch scheme⁶.

What follows sets out where each supplier's tariffs, service record, export payments and product range differ, and what each means for a household's grip on its own energy.

Octopus and E.ON Next at a glance

The two companies have different histories and different owners. E.ON Next traces back to Powergen, founded in 1989 and acquired in 2002; in 2018, through an asset swap between parent companies, E.ON took on npower and all its customers and changed its name¹. Its majority owner is E.ON SE of Germany¹. Octopus Energy's majority owner is Octopus Group (UK), and it also operates Co-Op Energy, which scores the same in the Which? survey¹. Sainsbury's Energy is a trading name of E.ON Next and likewise scores the same as its parent⁵.

Both hold several supply licences. Ofgem lists Octopus Energy Limited, Octopus Energy Operations Limited, Octopus Energy Operations 2 Limited and Octopus Energy Trading Limited under the Octopus group, and E.ON Next Energy Limited, E.ON Energy Solutions Limited, E.ON UK plc and Npower Commercial Gas Limited under E.ON¹¹. That matters to a household only in the sense that the brand on the bill is not always the licensed entity.

Tariffs and pricing: fixed deals, variable rates and the price cap

E.ON Next's standard variable tariff is exposed to the cap cycle: its own guidance states prices could go up or down when the price cap gets reviewed, in January, April, July and October each year¹³. That is the rhythm a household on a variable deal lives with, and it applies across suppliers, not just this one. E.ON Next's bill layout shows the tariff name, whether it is fixed or variable, exit fees, unit rates and standing charges, so the terms are visible on the statement itself¹⁴.

On the fixed side, E.ON Next has been the dominant name in the collective switch rounds run through 2026. The USWCSS-APR26 scheme ran from 1 to 13 April 2026 with E.ON Next's Next Fixed 14m Collective v1 as the winning tariff; the May round ran from 12 to 18 May with E.ON Next and Ecotricity winning; the June round from 9 to 17 June with E.ON Next and Fuse Energy; and the September round from 11 to 17 September with E.ON Next and Ecotricity⁶. A household that joins a collective switch is choosing from whatever the winning suppliers offer in that window, and in 2026 that has repeatedly meant an E.ON Next fixed product.

Switching tariff within E.ON Next carries no extra cost, though the company states it might charge an exit fee if a customer leaves before the contract ends¹⁵. That distinction matters: changing product inside the same supplier is not the same as leaving it. On the export side, Octopus's Outgoing tariff is fixed with no fixed end date, and its SEG tariff is likewise fixed with no fixed end date¹⁶.

Smart tariffs and time-of-use options compared

Time-of-use pricing is where the two suppliers diverge most clearly. Octopus Energy's Intelligent Octopus tariff has six hours of cheaper electricity overnight¹⁷. For electric vehicle drivers, Octopus's systems take over the scheduling: customers select the time they need the car by and the amount of charge they need, and Octopus's systems charge at the cheapest times¹⁸. That is a genuine transfer of control to the supplier's software, and it is the mechanism that makes the cheap window usable without a household watching the clock.

Octopus also runs Intelligent Octopus Flux, a two-rate tariff with matching import and export prices and automated battery management that charges the battery when power is cheapest and exports between 4pm and 7pm⁸. For a household with solar and a battery, that combination of import and export rates in one product is the closest thing in this comparison to a self-managing system.

Charger compatibility is not universal. The Wallbox Pulsar Max is described as able to make the most of the Intelligent tariff from Octopus, although it is not yet compatible with OVO's equivalent¹⁹. E.ON Next's own charger guidance covers the Ohme ePod, Ohme Home Pro and zappi GLO, all with solar charging compatibility, Wi-Fi or 3G/4G connectivity, and tethered or untethered options²⁰. Both suppliers simplify the move between tariffs and may help with smart meter installation, which is often the prerequisite for any of these products²¹.

Customer service: Citizens Advice scores, complaints and Trustpilot

The independent evidence favours Octopus on service. Ofgem's January 2026 supplier-level findings record that a significantly higher proportion of Octopus Energy customers reported being satisfied or very satisfied with customer service than the average, at 86%, and a significantly lower proportion reported dissatisfaction⁷. In the July to August 2025 findings, 84% of Octopus customers were satisfied or very satisfied and 1% dissatisfied or very dissatisfied, while EDF Energy, E.ON / E.ON Next, OVO Energy and Scottish Power all had a significantly lower proportion satisfied than the average²².

Citizens Advice publishes a quarterly five star rating on suppliers' customer service including complaints²³. For January to March 2026 Octopus Energy scored 3.67 out of 5 overall and 3.4 out of 5 on complaints, ranking 4th in the supplier comparison table¹⁵. E.ON Next's own Q2 2026 performance report records 760 complaints received and 758 resolved per 100,000 customers, with 59,276 complaints opened and 59,138 resolved in the quarter; customer service was the largest single reason at 32.28% of complaints and payments at 12.16%⁹.

Trustpilot figures for E.ON Next are inconsistent across the documents. One independent source gives 4.5 out of 5 based on over 162,000 reviews, another gives 4.3 stars out of 5, and the company's own pages give 4.5 out of 5 with a review count of 231,864²⁴.

Export payments: Smart Export Guarantee rates for solar households

The Smart Export Guarantee opened in January 2020 as the replacement for the Feed-in Tariff, paying households for electricity exported to the grid²⁵. Eligibility requires solar panels, or small wind of 5MW or less, or micro CHP of 50kW or less, installed at the home or business²⁶. Ofgem's Year 5 report on the scheme found the lowest tied and untied tariff rates were 5p per kWh from Octopus and 1p per kWh from E Energy respectively²⁷.

The rates a household can actually get vary enormously by product and by condition. Octopus Energy's standard SEG rate is 4.1p per kWh⁸. Its Intelligent Octopus Flux pays 23p per kWh, but only to Octopus customers who have both solar panels and a battery⁸. E.ON Next's Next Flex Export v1 pays 6p per kWh to customers with solar panels and an installer capacity of up to 5MW, while Next Export Premium v3 pays 17.5p per kWh to E.ON customers who have their solar panels or battery storage installed by E.ON Energy Installation Services after 10 November 2025⁸.

That last condition is the crux. The highest E.ON Next export rate is tied to buying the hardware through the same company, whereas Octopus's high rate is tied to owning a battery, not to buying it from Octopus. Which? notes that Octopus offers some of the highest export tariff rates, but that a household does not have to buy its solar solutions²⁸. For a household weighing independence, the difference is whether the export premium locks in a hardware purchase or only a tariff.

Batteries, EV charging and the wider product range

Octopus announced the Nook home battery range on 22 June 2026, comprising the Nook Cube plug-in battery and the Nook Colossus wall-mounted battery system, at its Energy Tech Summit²⁹. The range is scheduled to become available to Octopus customers in the UK, Germany, Italy, Spain and France from the year after that announcement, so 2027²⁹. No firmer UK date has been published. Octopus's Outgoing tariff already includes battery storage as a feature¹⁶.

The Octopus Home Mini, a small device for reading live consumption, had a waiting list as of January 2026¹⁷. That is a reminder that the product side of these suppliers is not always immediately available, and that a household planning around a device should check availability rather than assume it.

On charging, E.ON Next's guidance covers the Ohme ePod, Ohme Home Pro and zappi GLO, each with solar charging compatibility, Wi-Fi or 3G/4G connectivity, and a choice of tethered or untethered²⁰. Octopus's charging proposition is built around the Intelligent tariff and the scheduling software behind it¹⁸. Both approaches depend on a smart meter and a stable connection to the supplier's systems, which is the dependence that remains even when the hardware is owned outright.

Billing, Direct Debit and switching practicalities

Octopus Energy accepts Direct Debit, Pay As You Go, bank transfer, credit or debit card, cash, Fuel Direct, where payments are deducted from benefits, and cheque³⁰. It also offers weekly or fortnightly direct debits, with payments reviewed and adjusted more easily³¹. E.ON Next accepts monthly Direct Debit, card payments through the online account or by phone, bank transfer, and cash at Post Office, Payzone and PayPoint using the barcode on the bill¹³. Its bill shows the overall account balance, which indicates whether the account is in debit or credit and helps a household check whether the direct debit level is right¹⁴.

For new E.ON Next customers, the first monthly payment is estimated from the quote and the previous supplier, because actual data is only accessed after the switch under data protection guidelines¹³. That estimate is the usual source of a first-year surprise in either direction. When switching supplier, the standard sequence is to set up the direct debit with the new supplier ahead of the takeover date and cancel the old one after paying the final bills³². Moving from cash or cheque to Direct Debit is done by calling the supplier and asking about the discount offered, with the change appearing on the next bill³³.

E.ON Next states the whole switch can take around five working days with a 14 day cooling off period, and that switching directly takes about five minutes online¹⁰. Its support pages put the supply transfer at up to five working days¹⁵. Both suppliers are named among those that simplify the move from one tariff to another and may help with smart meter installation²¹, and both are listed among the suppliers that should help a household whose in-home display is more than a year old³⁴.

Which supplier fits which household

The choice turns on what a household already owns and how much it wants the supplier's software to do. A household with solar and a battery that wants a high export rate without buying hardware from the supplier is looking at Octopus's Intelligent Flux at 23p per kWh, against E.ON Next's 17.5p per kWh that requires installation by E.ON after 10 November 2025⁸. A household with an EV that wants the supplier to schedule charging automatically is looking at Intelligent Octopus and its six cheap overnight hours¹⁷.

A household that wants a large traditional firm with a strong Which? score and a record of winning collective switches is looking at E.ON Next, which scored 66% in January 2026 and took the winning tariff in four collective switch rounds that year². A household that weights independent service data most heavily is looking at Octopus, with 86% satisfaction in Ofgem's January 2026 findings and a 3.67 out of 5 Citizens Advice score for January to March 2026⁷.

What neither supplier removes is dependence. Both rely on the grid, on a smart meter and a connection to the supplier's systems, and on the price cap cycle for anyone on a variable tariff¹³. Octopus's high export rate depends on owning a battery; E.ON Next's highest export rate depends on buying hardware from E.ON. The Nook battery is scheduled for 2027, not now²⁹. For a household weighing energy independence, the practical question is which dependencies are acceptable, not whether any can be eliminated. Households comparing more widely can look at Octopus against British Gas or E.ON Next against British Gas, and the full guide to UK suppliers sets out the wider market.