100Green vs EDF Energy (November 2026)

Overall comparison

About 100Green and EDF Energy

Tariffs and pricing

The lowest annual estimate shown for EDF Energy is £1,622 a year on Simply Tracker Jan28. This is a tracker tariff, so its rates can change, and it carries a £100 exit fee. 100Green's lowest is £1,787 a year on Sparkling SVT, a variable tariff with a £0 exit fee. On these two deals EDF is £165 a year cheaper, or about £14 a month.

EDF's Standard (Variable) tariff is also priced here, at £1,672 a year with a £0 exit fee. It may suit households who want a lower price than Sparkling SVT but would rather not pay a fee to leave.

Among fixed-price deals, EDF's Simply Fixed 2Yr Nov28v2 costs £1,948 a year on a 24-month contract. That is £25 a year (about £2 a month) less than 100Green's Exclusive Spring 100% Green 12M November 27, which costs £1,973 on a 12-month contract. The saving comes with a longer commitment, because EDF's two-year deal has a £200 exit fee while 100Green's has none.

EDF also offers a shorter fixed deal, Simply Fixed Nov27v2, which runs for 12 months with a lower £100 exit fee but costs more, at £2,094 a year. At 100Green, all four tariffs priced here have £0 exit fees. These include two other 12-month fixed deals: Stream Fixed - November 27 at £2,005 and Sparkling Guarantee - November 27 at £2,018.

100Green and EDF Energy: tariff options

100Green

Most households will choose between the Sparkling tariffs, which both come with UK-generated renewable electricity and green gas if you need it. Sparkling Guarantee fixes your unit rates for 12 months, so your bill only changes with how much energy you use. Sparkling Variable, shown in our price table as Sparkling SVT, follows the wholesale market instead, and 100Green writes to you 30 days before any price change. It is exempt from the price cap because it supports renewable generation, so its rates may be above or below the cap at different times. Two other 12-month fixed deals, Exclusive Spring 100% Green 12M November 27 and Stream Fixed - November 27, also appear in our price data.

100 Origin suits households that want their heating covered as well as their electricity. It has fixed rates, carries the EKOenergy ecolabel and matches all of your electricity with renewables and all of your gas with certified UK green gas.

The Tide tariffs charge different electricity prices at different times of day, and they need a smart meter. If you don't have one, 100Green suggests starting on a standard tariff, asking for a free upgrade and switching once the meter is fitted. If you take gas as well, it costs the same at any time of day. Tide Smart has variable prices, while Tide EV and Tide Lifestyle have rates guaranteed for 12 months.

If you generate your own renewable electricity, the Export Tariff pays for what you send to the grid. You have to apply with documents such as your MCS certificate, and the whole sign-up can take up to eight weeks.

EDF Energy

Most homes choose between Standard (Variable), which follows the Ofgem price cap, can change every three months and has no end date, and Simply Fixed, which holds unit rates and standing charges for 12 or 24 months. The two-year deal gives longer certainty but carries a bigger exit fee than the one-year deal, so it suits households confident they will stay. Simply Tracker Jan28 also moves with the price cap each quarter, but EDF takes a discount off the daily standing charge for each fuel. Unlike Standard (Variable), it can carry an exit fee, and customers with a traditional prepayment meter need to move to smart pay as you go to get it.

GoElectric is a 12-month fixed tariff with cheaper electricity from 11pm to 6am that works with any EV and charger. Pod Plug & Power adds a Pod Point charger, with part of its cost paid upfront and the rest spread over a two-year fixed-price tariff. GoElectric customers can add the Smart Charging bolt-on, letting EDF control when the car charges in return for extra off-peak hours and an annual bill credit. It is open to existing domestic customers aged 18 or over in England, Scotland or Wales who own an eligible EV or home charge point, have a working half-hourly smart meter and use MyAccount and paperless billing. It can't be used alongside another flexibility scheme or charging schedule.

Heat Pump Tracker follows the price cap but gives six discounted hours a day with no peak rate, for homes heated by an air source heat pump, whoever fitted it. FreePhase Static and FreePhase Dynamic suit homes that can move electricity use away from 4pm to 7pm. Static fixes the price of each band for the tariff, while Dynamic sets new prices a day ahead based on wholesale costs, so your bill depends more on when you use power. EDF says smart tariffs may suit you less if you use most of your electricity at peak times or can't easily change when you use it.

Empower Fixed Exclusive 12m requires an enquiry and purchase of solar panels, a battery or both through EDF after 2 March 2026, with installation by Contact Solar. Export Exclusive 12m V3 requires a Contact Solar lead form submitted on or after 2 March 2026 that results in a new installation. For that export tariff, your home must have solar panels, with or without a battery, and no other generation technology. Export 12m V2 also suits homes that already generate their own power. All of these need you to buy your home electricity from EDF.

Customer reviews

EDF Energy has a Trustpilot rating of 4.8 from 268,502 reviews, while 100Green scores 4.6 from a much smaller base of 1,594 reviews. Of EDF's reviews, 84% are five-star, compared with 74% for 100Green, and one-star reviews make up 6% for EDF and 8% for 100Green. Both suppliers reply to most negative reviews: EDF to 99%, usually within 24 hours, and 100Green to 90%, usually within 48 hours.

100Green reviewers often praise friendly, helpful staff who answer the phone quickly, explain account processes clearly and sort out problems without delay. The main criticism concerns higher bills and unexpected pricing issues, and both mistakes and price appear among the topics customers mention most.

EDF reviewers describe polite, patient and knowledgeable phone staff who help quickly with everyday account queries and contract changes. Complaints focus on long delays in communication and difficulty getting more complex problems resolved, and some reviewers found it frustrating to get callbacks or to get staff to take responsibility for a problem. Payments also come up often in EDF reviews.

The Which? total score, which combines a customer survey with Which?'s own supplier assessment, is 72% for 100Green and 58% for EDF Energy. In the customer survey, 100Green customers rated overall customer service 4 out of 5, against 2 out of 5 for EDF. In the supplier assessment, 100Green scores 12 out of 15 for complaints and 9 out of 12 for contacting your supplier, against 7 and 3 for EDF. EDF does better on help for those who need it, scoring 9 out of 10 against 4 out of 10 for 100Green, while both score 1 out of 5 for switching.

Mobile apps

EDF Energy's app is rated 4.6 on the App Store from 193,000 ratings and 4.3 on Google Play from 52,739 ratings, with more than a million installs on Android. 100Green's app scores 1.2 on the App Store from 25 ratings and 1.2 on Google Play from 34 ratings, which is too few to compare fairly with EDF's much larger totals. Both suppliers have updated their iPhone apps three times in the past 90 days.

One 100Green iPhone user said the app shows electricity use by day, week and month, but gas use only monthly and only for the previous month, which they found frustrating with a smart meter. Another said they could not change payment settings in the app or view bills without downloading them first.

On EDF's app, one iPhone user called the current version a big improvement on an older one that was slow and crashed often. Another, less happy, user missed the days when it was a simple way to send meter readings and check bills.

Service and support

For April to June 2026, Citizens Advice gives 100Green 3.9 out of 5, ranking it 2nd, and EDF Energy 2.96 out of 5, ranking it 10th. The clearest difference is on the phone: 100Green's average call centre wait was 7 seconds, against 2 minutes 47 seconds for EDF. 100Green says it runs a phone-first service with a UK-based team and no automated queues.

For written enquiries, 100Green answered 98.4% of emails within two days, against 85.4% for EDF. 100Green's average webchat response was 51 seconds, though there is no matching EDF figure to compare it with. EDF answered 90.9% of text messages and 91% of WhatsApp messages within two days, so its customers have other written ways to get in touch beyond email.

Both suppliers base nearly all smart meter bills on actual readings: 99.78% for 100Green and 97.6% for EDF. The gap is wider for traditional meters, at 99.95% against 90.75%, so a larger share of EDF bills for homes without a smart meter are not based on an actual reading. EDF has the higher share of working smart meters, however, at 92.67% against 86.05%.

Complaints: 100Green vs EDF Energy

Both suppliers' own complaint figures are for Q2 2026, so they can be compared directly. In that quarter, 100Green received 90 complaints per 100,000 customer accounts, while EDF Energy received 965 per 100,000 customer accounts. That is more than ten times as many relative to the number of accounts. These figures count complaints made, not the number of customers who complained. One customer can complain more than once, and the rate is per customer account rather than per household.

EDF Energy also reported how quickly it dealt with complaints in Q2 2026. It resolved 62% by the end of the same or next working day, and 86% within eight weeks. That leaves about 14 in every 100 complaints still open after eight weeks. These figures show speed only. They do not show whether customers were happy with the outcome. 100Green did not supply resolution figures, so it is not possible to compare how quickly the two suppliers sort out complaints.

Citizens Advice figures are a separate measure. They count complaints made to advice bodies and the Energy Ombudsman, not complaints made directly to the supplier, and they are per 10,000 customers rather than per 100,000 customer accounts. Both suppliers' figures cover April to June 2026. In that period, 100Green had 22.8 complaints per 10,000 customers and EDF Energy had 47.7 per 10,000 customers, about twice as many. These rates should not be converted or set against the supplier-reported figures above. Even so, on both measures for this period, 100Green had fewer complaints relative to its customer numbers.

What customers complain about

EDF Energy published a breakdown of its main complaint reasons, but no period was given for it, so it cannot be tied to Q2 2026. 100Green did not supply any breakdown of complaint reasons. This means the cards below show what EDF Energy customers complain about, but cannot show whether 100Green customers have similar or different problems.

100Green and EDF Energy: green energy

100Green

Every 100Green tariff comes with UK-generated, 100% renewable electricity. The company says it buys directly from small British hydro, wind and solar generators, such as a small dairy farm in Norfolk. It also offers generators power purchase agreements. These are contracts to buy the electricity a generator feeds into the national grid, and 100Green asks those generators to be eligible for REGO certificates.

A REGO (Renewable Energy Guarantee of Origin) is a certificate issued for each megawatt hour of electricity made from a renewable source. 100Green says it holds a REGO for every megawatt hour it supplies, and Ofgem audits this every year. All homes draw from the same shared grid, so these contracts and certificates match your use with renewable generation rather than sending particular power to your home.

100Green also buys spare electricity from households that make their own. One customer of more than 20 years, Professor Susan Roaf, built Britain's first solar roof in the early 1990s. 100Green buys her extra power and supplies her when she needs more. Through its partnership with Energy Local, it links communities with nearby renewable generation and handles the regulation, billing and licensing for them.

On gas, all 100Green tariffs have at least 10% green gas certification, backed by Renewable Gas Guarantees of Origin and the Green Gas Certification Scheme. The 100 Origin tariff goes further and matches all of your gas with certified green gas, made in the UK from biowaste and organic residues. 100Green also offers gas purchase agreements, which pay producers for the biogas they put into the gas grid.

100 Origin is certified by EKOenergy, an ecolabel run by a non-profit network of environmental organisations. Its rules have three main parts. Wind and solar sites must be outside protected nature areas and important bird areas. Hydro schemes must keep water flowing and allow for fish migration. Bioenergy must come only from organic waste and certain woody materials, with no energy crops.

An annual audit checks that the 100 Origin energy sold meets these rules. A contribution for each megawatt hour sold also goes to the EKOenergy Climate Fund, which pays for clean energy projects in remote communities in developing countries.

EDF Energy

EDF's customers' electricity comes from its own UK power stations, the wholesale energy market and other independent generators, and EDF says it is a major supporter of independent renewable generators. Across its EDF Energy Customers Limited supply licence from 1 April 2025 to 31 March 2026, nuclear power was the largest source at 41.1%, followed by gas at 28.5%, renewables at 23%, coal at 5% and other sources at 2.4%. Nuclear produces no carbon dioxide when it generates power, but it is not renewable, which is why this low-carbon mix still has a modest renewable share.

EDF shows the UK average from the Department for Energy Security and Net Zero alongside its own: 48% renewable and 13.7% nuclear.

The source behind your electricity depends on your tariff. In the same period, products sold as renewable were backed by 100% renewable sources, and products sold as zero carbon or nuclear backed were backed by 100% nuclear power. All other products had a mix of 44% nuclear, 38.4% gas, 6.7% coal, 7.7% renewable and 3.2% other.

EDF says its heat pump tariffs are backed by zero carbon electricity it generates in the UK. In its disclosure, zero carbon products are backed by nuclear power, so this is a low-carbon promise rather than a renewable one. As with any supplier, customers receive electricity through the National Grid, not directly from the power stations behind a tariff.

Households that want to make their own power can buy solar panels and batteries through EDF, installed by Contact Solar, and EDF's export tariffs then pay for any surplus electricity sent back to the grid.

Our verdict

What changed this month

This month, EDF Energy's play store days since last update rose from 14 to 25, 100Green's iOS app days since last update rose from 29 to 39, and 100Green's iOS sampled reviews avg stars rose from 1 to 1.33. There were 22 other data changes this month — see the full changelog below for details.

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