Octopus Energy Fuse Energy (October 2026)
Comparison at a glance
Fuse Energy leads on the priced deals and Android ratings, while Octopus Energy offers an exit-fee-free lead tariff and more independent service evidence.
Fuse Energy may suit households who prioritise price and Android ratings, while Octopus Energy offers an exit-fee-free lead tariff and more independent service evidence. Both score 4.8 out of 5 on Trustpilot, so their headline customer ratings do not separate them. Fuse’s lowest annual estimate shown is £44 lower, but its tracker has changing rates and a £200 total exit fee. Octopus has a 74% Which? total score, while a current figure is not available for Fuse. Neither has a firm overall lead.
About Octopus Energy and Fuse Energy
Who is Octopus Energy?
Octopus Energy is part of Octopus Energy Group, whose work spans household energy, technology and renewable generation. Its broad approach is to link energy supply with changes in how homes use electricity, including moving demand away from busy periods. The group's generation business, Octopus Energy Generation, backs, builds and manages renewable projects.
For customers, Octopus combines digital contact with household telephone support. This gives households a phone option alongside email, rather than making every enquiry depend on a digital conversation.
Products & services
Awards & recognition
Who is Fuse Energy?
Fuse Energy combines household energy supply with electricity generation from its own solar and wind farms. Its stated approach is to sell renewable certificates and reinvest the proceeds in more clean-energy infrastructure, rather than keep those certificates to support a fully renewable supply claim.
That makes its generation work a useful part of the company background, but a different question from the terms of a household contract. Its priced household options include variable rates, fixed rates and a wholesale-linked tracker.
Products & services
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Tariffs and pricing
Fuse Energy: October 2026 Tracker (15m) V4 has the lowest annual estimate shown at £1,620, compared with £1,664 for the variable Flexible Octopus tariff. That makes it £44 a year, or about £4 a month, lower. However, its 15-month contract does not fix its rates: they can change, and leaving carries a £200 total exit fee. Fuse’s separate Variable Import costs £1,672 a year with no exit fee.
Fuse’s October 2026 Fixed (18m) V11 costs £1,782 a year, with an 18-month term and £100 total exit fee. Its annual estimate is £49 a year, or about £4 a month, below Octopus’s lowest fixed estimate shown. Fuse also has shorter fixed deals at higher annual estimates: October 2026 Fixed (16m) V1 costs £1,806 with the same fee, while October 2026 Fixed (12m) V11 costs £1,886, also with a £100 fee.
Octopus Energy: Flexible Octopus has a £0 exit fee, so you can leave without paying the fee attached to Fuse’s lead tracker. Its rates can change, however, unlike those on the named fixed deals. Octopus 18M Fixed October 2026 v5 costs £1,831 a year, with an 18-month term and £150 total exit fee.
For a shorter commitment, Octopus 12M Fixed October 2026 v6 costs £1,886 a year for 12 months, with a lower £100 total exit fee. That is £55 more a year than the 18-month deal in exchange for a shorter contract and lower leaving fee. All the deals priced here use monthly Direct Debit. Fixed rates do not fix the total bill if energy use changes.
Octopus Energy and Fuse Energy tariff options
Octopus Energy tariffs
Flexible Octopus has variable pricing. The named fixed alternatives are Octopus 12M Fixed October 2026 v6, with a 12-month term, and Octopus 18M Fixed October 2026 v5, with an 18-month term. The shorter deal ends sooner and has a lower total exit fee; the longer deal keeps rates fixed for longer. Fixed rates protect the price of energy, not the total bill when usage changes.
Octopus Go offers set overnight hours without needing a supported car-to-app connection, while Intelligent Octopus Go needs integration through a supported vehicle or charger. Agile suits households able to move use between half-hours, but prices can spike. Cosy supports eligible electric heating, Snug controls suitable storage heaters, and Flux combines imports and exports for solar-and-battery homes. Smart import plans need half-hourly meter data; their terms also restrict switching between smart plans and returning after leaving.[1]
Eligibility
Have an electric or plug-in hybrid vehicle charged mainly at the Octopus-supplied home, with integration through a supported vehicle OR charger; Have a working compatible smart meter, allow half-hourly readings and relevant data sharing for grid services; Register the device in the Octopus app within seven days and maintain its internet or mobile connection and control authorisation. Losing authorisation for more than 30 days can end eligibility; Allow Octopus to schedule and control charging, with exclusive grid-service rights and no third-party demand-response scheme for the home.
Eligibility
Octopus home supply, an owned or long-term leased electric or plug-in hybrid vehicle charged at home, and a connected SMETS2 or Secure SMETS1 meter sending half-hourly readings. A dedicated home charger is not needed. Any export tariff must be compatible with Go.
Eligibility
Have an Octopus electricity supply account; Use a connected SMETS2 or Secure SMETS1 meter and allow half-hourly readings.
Eligibility
Have Octopus supply and an operational air-source or ground-source heat pump, electric boiler or electric radiators; other systems need approval; Use a connected SMETS2 or Secure SMETS1 meter and allow half-hourly readings.
Eligibility
Have operational solar panels and a home battery, with both electricity import and export accounts at Octopus; Have an export MPAN and a connected SMETS2 or Secure SMETS1 meter giving half-hourly import and export readings; Give Octopus the solar installation's MCS certificate and distributor G98/G99 certification; Schedule the battery yourself and permanently stop FiT deemed-export payments, notifying another FiT supplier if needed. FiT generation payments can continue.
Eligibility
Have an Octopus account with a compatible import tariff, an export MPAN and a supported smart meter sending half-hourly export readings; Stop FiT export payments while keeping generation payments. You cannot join if FiT payments started within the last 12 months; Generation installations normally need an MCS certificate, DNO notification and response, though a non-MCS route exists. Home generation is not essential for suitable battery exports.
Eligibility
Have electric night storage heaters controlled by a compatible SMETS2 meter's auxiliary load control switch and compatible ALCS calendar; any heater brand can work; Be the Octopus account holder and live at the supplied property; Allow half-hourly readings, relevant grid-service data sharing and Octopus control of heaters and other loads on the same circuit. Do not join third-party flexibility schemes.
Fuse Energy tariffs
Variable Import has variable pricing, while October 2026 Tracker (15m) V4 is a variable tracker with a 15-month contract. That distinction matters: a defined contract length does not fix the tracker's rates. The tracker also carries an early-exit commitment, so it is not interchangeable with Variable Import simply because both have changing prices.
The fixed-rate editions are October 2026 Fixed (12m) V11, October 2026 Fixed (16m) V1, October 2026 Fixed (18m) V11 and October 2026 Fixed (24m) V7. Their terms are 12, 16, 18 and 24 months, respectively. The shorter editions let the fixed period end sooner, while the longer editions keep rates set for longer. Each named fixed edition has an early-exit fee, so the choice involves both the length of price protection and the cost of leaving before the term ends.
Customer reviews
Both suppliers score 4.8 out of 5 on Trustpilot, based on 880,701 reviews for Octopus Energy and 13,167 for Fuse Energy. Five-star reviews account for 90% for Octopus and 92% for Fuse, while both have 3% one-star reviews. The ratings therefore show similar headline sentiment, although Octopus’s score rests on a much larger review total.
Octopus reviewers often praise helpful, polite staff for explaining bills and tariffs clearly and sorting out account problems promptly. Less positive accounts describe slow replies to complex requests, communication difficulties and unresolved installations or account changes. At Fuse, reviewers praise professional engineers carrying out installations and meter replacements, as well as clear account-setup guidance. Criticism centres on difficulty reaching someone by phone, delayed communication, tariff-switching hurdles and incorrect meter details.
Octopus replies to 97% of negative Trustpilot reviews, typically within one week, while Fuse replies to 79%, typically within two weeks. These figures describe replies rather than whether the issues were settled.
Octopus’s Which? total score is 74%. Customers give its overall service, ease of contact and statement clarity 4 out of 5. Separately, the Which? supplier assessment awards 10 out of 10 for help for those who need it. Current Which? figures are not available for Fuse, so these results do not provide a head-to-head service comparison.
App ratings
The iPhone apps are tied at 4.8 out of 5, although Octopus Energy has 263,000 ratings compared with 841 for Fuse Energy. Both iOS apps have had three updates in the past 90 days.
On Android, Octopus has at least 1,000,000 Play Store installs and Fuse at least 100,000. Fuse is better rated at 4.9 out of 5 from 1,010 ratings, compared with 4.3 from 47,449 for Octopus. Unlike the tied iPhone scores, Android user ratings give Fuse an advantage.
Service and support
Average response: 1.2 min (April to June 2026)
Hours: Monday 9am-5pm, Tuesday 9am-5pm, Wednesday 9am-5pm, Thursday 9am-5pm, Friday 9am-4pm
Replies: 86.4% within 2 days (April to June 2026)
Hours: 7 days/week
Octopus Energy scores 3.67 out of 5 and ranks fifth in Citizens Advice’s April to June 2026 service results. During that period, its average call centre wait time was 1 minute 9 seconds, while 86.4% of emails received a response within two days. A current Citizens Advice score, call wait and email response figure are not available for Fuse Energy, so there is no equivalent service-score comparison or basis for saying which supplier answers faster.
Octopus’s routine phone line is open Monday to Thursday, 9am–5pm, and Friday, 9am–4pm. Its email team is available seven days a week, offering a way to get in touch outside the phone line’s weekday schedule, though not a promise of an immediate reply. If you prefer talking through a problem, Fuse reviewers’ reports of difficulty reaching someone by phone are worth considering.
For April to June 2026, 96.33% of Octopus smart-meter bills and 93.99% of traditional-meter bills were based on actual readings. It also recorded 91% of smart meters working. These measures describe its reading-based billing and meter performance, but matching current figures are not available for Fuse.
| Billing and metering | Octopus Energy — April to June 2026 | Fuse Energy |
|---|---|---|
| Smart meters working correctly | 91% | Not reported |
| Bills based on readings — smart meters | 96.33% | Not reported |
| Bills based on readings — traditional meters | 93.99% | Not reported |
Complaints and performance
Octopus Energy reported 476 complaints per 100,000 customer accounts in Q2 2026. This counts complaint events, not the number or share of individual customers affected. No complaints data was available for Fuse Energy, so these figures cannot show which supplier handles complaints better.
For Q2 2026, Octopus reported resolving 43% of complaints on the same or next working day and 80% within eight weeks. These figures show how quickly complaints were closed, rather than whether customers were happy with the outcome. They show that a quick resolution was not the experience for every complaint.
Citizens Advice recorded 21.4 complaints to advice bodies and the Energy Ombudsman per 10,000 Octopus customers for April to June 2026. This is a separate measure from complaints received directly by Octopus, with a different denominator. No matching figure was available for Fuse Energy.
Octopus also lists five complaint themes and its responses below. No reporting period or percentage shares were supplied for these themes, so they cannot be tied to Q2 2026 or used to compare the suppliers’ mix of complaints.
What their green energy claims mean
Octopus Energy: renewable buying, nuclear power and tariff promises
Octopus says it mainly buys electricity from wind, solar and hydro sources. It also buys renewable electricity from more than 700 UK generators through power purchase agreements, or PPAs. These are contracts to buy a generator's output. Its community-energy buying includes projects owned and run by local people, where profits support local charity or environmental work.[1]
The supplier-wide disclosure for 1 April 2024 to 31 March 2025 records renewable electricity alongside nuclear power. Nuclear is not renewable, even though it does not burn gas or coal to generate electricity. This annual supply record is separate from the renewable promise attached to a particular household tariff.
For example, Agile Octopus and Octopus Flux say each megawatt-hour used on the tariff is matched with a Renewable Energy Guarantee of Origin certificate from British renewable generation. A REGO records the renewable origin of an amount of electricity; matching does not mean a home receives renewable generation at every hour through the shared grid.
There is generation activity beyond buying power. Octopus describes owned and adopted wind turbines in Yorkshire, South Wales and Lincolnshire. Separately, Octopus Energy Generation, part of the group, reported 5.7 GW across its managed portfolio in May 2026. Managed projects are wider group activity, rather than a promise that their output backs every household tariff.
Fuse Energy: generation and reinvested certificate income
Fuse reports that its solar and wind farms generated 18.9 GWh during 1 April 2024 to 31 March 2025. This is actual generation activity, separate from the electricity it buys from the grid to meet customer demand. Solar and wind output changes with the weather, so those farms do not cover household demand at every hour.
For that same period, Fuse's physical-source view lists 16.12% solar, 1.39% wind and 82.49% grid electricity. The grid category is not a fuel: it contains electricity from several sources. Those figures therefore cannot give a complete renewable, nuclear and fossil-fuel breakdown of its regulated supply.
Fuse says it sells its renewable certificates and reinvests every penny in clean-energy infrastructure and technology. Selling the certificates means the renewable claim attached to that generation is sold too. For a household, the distinction is between supporting Fuse's generation-and-reinvestment approach and choosing a tariff with a specific certificate-matching promise.
Our verdict
| If you care most about | Choose |
|---|---|
| The lowest annual tariff estimate shown | Fuse Energy |
| Higher ratings from Android app users | Fuse Energy |
Fuse Energy leads on the priced deals and Android ratings, while Octopus Energy offers an exit-fee-free lead tariff and more independent service evidence.
Both suppliers receive positive customer feedback, sharing a 4.8 out of 5 Trustpilot rating and praise for helpful staff. Neither has a firm overall lead: Octopus offers a phone contact route and independent service results, while Fuse has the better-rated Android app and lower annual estimates shown. Current Which? and Citizens Advice scores are not available for Fuse, which limits the service comparison.
Octopus may suit you better if phone contact and independent service evidence matter most, particularly if you also value Flexible Octopus’s lack of an exit fee. Fuse may suit you better if Android ratings and lower-priced deals are your priorities, but choosing its tracker means accepting changing rates and a leaving fee; a named fixed deal is an alternative. These practical differences, rather than a gap in headline customer satisfaction, are the main reasons to choose between them.
- Customers praise helpful staff and clear explanations of billing and account issues.
- Routine weekday phone support and email availability seven days a week.
- Flexible Octopus has a £0 exit fee.
- Higher lowest overall and fixed annual estimates than Fuse in this comparison.
- Some reviewers report delays with complex requests and installations.
- Lower Android rating than Fuse.
- Customers praise installation engineers and clear account-setup guidance.
- Lower lowest overall and fixed annual estimates shown.
- Higher Android rating, with iPhone ratings tied.
- The lead tracker has changing rates, a 15-month contract and a £200 total exit fee.
- Some reviewers report communication difficulties and tariff-switching problems.
- Current Which? and Citizens Advice scores are not available.
Frequently asked questions
Does Fuse’s 15-month tracker keep rates fixed?
No. October 2026 Tracker (15m) V4 has rates that can change during its 15-month contract. It also carries a £200 total exit fee, so changing prices do not mean you can leave without a fee.
Which priced tariffs have no exit fee?
Flexible Octopus and Fuse’s Variable Import both have a £0 exit fee. Their annual estimates are £1,664 and £1,672 respectively. Fuse’s lower-priced October 2026 tracker is a separate product with a £200 total exit fee.
Can I choose a shorter fixed contract?
Yes. Octopus 12M Fixed October 2026 v6 costs £1,886 a year for 12 months, with a £100 total exit fee. Fuse’s October 2026 Fixed (12m) V11 costs £1,886 a year, also for 12 months with a £100 total exit fee. Those annual estimates are effectively identical under our assumptions.
When can I phone Octopus about my account?
Octopus’s routine phone line is open Monday to Thursday, 9am–5pm, and Friday, 9am–4pm. Its email team is available seven days a week, but that is not a promise of an immediate response.
How quickly does Octopus answer calls and emails?
For April to June 2026, its average call centre wait time was 1 minute 9 seconds, while 86.4% of emails received a response within two days. These are measured response figures, not guaranteed waits for an individual enquiry.
Does the app rating difference depend on my phone?
Yes. Both suppliers have an App Store rating of 4.8 out of 5. On Android, Fuse is better rated at 4.9 out of 5 from 1,010 ratings, compared with Octopus at 4.3 from 47,449 ratings.
Are Octopus’s bills based on meter readings?
In April to June 2026, 96.33% of Octopus smart-meter bills and 93.99% of traditional-meter bills were based on actual readings. These percentages describe the bills issued, not the share of customers with error-free bills.
What changed this month
This month, Octopus Energy's iOS app days since last update rose from 1 to 25, Octopus Energy's play store days since last update rose from 1 to 17, and Fuse Energy's play store days since last update rose from 3 to 20. There were 38 other data changes this month — see the full changelog below for details.
Data changes this month (51)
Octopus Energy
- Trustpilot reviews857,633 → 880,701
- Trustpilot negative reviews replied %96 → 97
- iOS app ratings count254,000 → 263,000
- iOS app days since last update1 → 25
- iOS sampled reviews avg stars2.5 → no longer available
- iOS sampled positive reviews1 → 0
- iOS sampled negative reviews1 → 0
- Play Store rating4.3669577 → 4.328419
- Play Store ratings count47,238 → 47,449
- Play Store days since last update1 → 17
- Play Store positive ratings %84.5 → 83.2
- Play Store negative ratings %11.7 → 12.6
- Play Store neutral ratings %3.7 → 4.2
- Play Store net-positive %72.8 → 70.6
- Citizens Advice rank4 → 5
- Complaints per 10,000 customers21.3 → 21.4
- Avg call centre wait time77 → 69
- Emails responded within 2 days %86.1 → 86.4
- Cheapest variable tariff£1,598.38 → £1,664.22
- Cheapest fixed tariff£1,641.76 → £1,831.1
- Cheapest tariff£1,598.38 → £1,664.22
- Cheapest fixed tariff exit fee£100 → £150
- Cheapest fixed tariff term12 months → 18 months
- Tariffs with comparison prices2 → 3
- Fixed tariffs with comparison prices1 → 2
- Longest fixed term12 months → 18 months
Fuse Energy
- Trustpilot reviews10,754 → 13,167
- Trustpilot 4-star %1 → 3
- Trustpilot 3-star %3 → 1
- Trustpilot positive reviews %93 → 95
- Trustpilot neutral reviews %3 → 1
- Trustpilot net-positive %89 → 91
- iOS app ratings count717 → 841
- iOS app days since last update5 → 25
- iOS sampled reviews avg stars4 → no longer available
- iOS sampled positive reviews2 → 0
- iOS sampled negative reviews1 → 0
- Play Store rating4.6792455 → 4.852941
- Play Store ratings count821 → 1,010
- Play Store days since last update3 → 20
- Play Store positive ratings %92.8 → 96.3
- Play Store negative ratings %6.4 → 1.8
- Play Store neutral ratings %0.9 → 1.9
- Play Store net-positive %86.4 → 94.5
- Cheapest variable tariff£1,611.29 → £1,619.84
- Cheapest fixed tariff£1,488.98 → £1,782.23
- Cheapest tariff£1,488.98 → £1,619.84
- Cheapest tariff exit fee£100 → £200
- Cheapest tariff term18 months → 15 months
- Tariffs with comparison prices5 → 6
- Variable tariffs with comparison prices1 → 2
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Written by
Rob Gibbs
Hi, I'm Rob, and I run Energy-Review.co.uk. I initially started this project in 2018 when I was looking to switch energy suppliers and found there wasn't a website that provided simple, data-backed reviews on all the suppliers available. Since then, I have spent a lot of time (too much, some may say!) looking at all publicly available data about each supplier and writing reviews using this information. These reviews are updated as regularly as possible, and any data is backed up by a source where necessary. I have also started writing guides on various energy-related topics, which hopefully you will find useful. If you find any issues, please use our contact form to let us know.