Updated October 17, 2026 · TariffCue Editorial Team
100Green vs ENTEGA
Where 100Green and ENTEGA differ
| Compare |  100Green |  ENTEGA |
|---|---|---|
| Fixed terms | 12 | 12, 24Covers more |
| Renewable basis | Ppa | Certificates |
| Smart meter required | YesHas it | No |
| Markets | GB | DE |
| Exit fee | £0 | Not confirmed |
| Export rate | £0.12 | Not confirmed |
| Customers | Not confirmed | 800,000 |
Same on both: Renewable share (100%).
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Key differences
- 100Green scores higher overall: 9.3 vs 8.5.
- Smart meter required: only 100Green.
- Tariff types: only 100Green offers Variable, Ev, Time of use.
- Tariff types: only ENTEGA offers Dynamic.
- Fixed terms: only ENTEGA offers 24.
- Markets: only 100Green offers GB.
- Markets: only ENTEGA offers DE.
Our verdict on each
100Green
100Green suits GB households that want renewable electricity and a free exit fee, with fixed terms set at 12 months and no charge to leave before the term ends. The offer covers both fuels, and the renewable supply sits behind a power purchase agreement.
ENTEGA
ENTEGA suits households in DE who want renewable electricity on a fixed or dynamic contract and would rather avoid a smart meter condition. Renewable content runs at 100% across the range, fixed terms run 12 and 24 months, and support covers email, phone and chat.
Score breakdown
| Area | 100Green | ENTEGA |
|---|---|---|
| Cost | 9.4Exit fees are £0, and the supplier ranks 1 of 29 brands on that measure. | Not confirmed |
| Offer | 9.4HigherTariffs cover fixed, variable and green, a wider set than Octopus Energy at fixed, variable and green or Vattenfall at fixed, green and variable. | 9.0 |
| Trust | 8.9Trades as Green Energy (UK) Limited and has been trading since 2001, based in GB. | Not confirmed |
Where each is licensed and available
| Country | 100Green | ENTEGA |
|---|---|---|
| Headquarters | United Kingdom | Germany |
Additional countries for 100Green: 1. Additional countries for ENTEGA: 1.
Which one suits you
Pick 100Green if smart meter required matter most.
Pick ENTEGA if fixed terms matter most.
How they place
| Ranking | 100Green | ENTEGA |
|---|---|---|
| Green energy suppliers | 12 of 56 | 7 of 56 |
| Smart and dynamic electricity tariffs | 8 of 43 | 5 of 43 |
Every fact side by side
| Fact | 100Green | ENTEGA |
|---|---|---|
| Tariff types | Fixed, Variable, Green, Ev, Time of use | Fixed, Dynamic, Green |
| Fuels | Electricity, Gas | Electricity, Gas |
| Legal entity | Green Energy (UK) Limited | ENTEGA Plus GmbH |
| Headquarters | United Kingdom | Germany |
| Founded | 2001 | Not confirmed |
| Support channels | Phone, Email, Chat, Help centre | Email, Phone, Chat, Help centre |
Where each stands against the rest
| Fact | 100Green | ENTEGA | Median |
|---|---|---|---|
| Exit fee | £0lowest quarter | Not confirmed | £50 |
| Renewable share | 100%at the median | 100%at the median | 100% |
| Export rate | £0.12at the median | Not confirmed | £0.12 |
| Customers | Not confirmed | 800,000below the median | 850,000 |
Median across 58 listed providers.
Pros and cons
100Green
Pros
- Renewable electricity at 100%, with the supply behind it coming from a power purchase agreement.
- Own generation is rewarded: exports are paid at £0.12.
- Both fuels come from one supplier, with electricity and gas covered on the same account.
Cons
- A smart meter is required for the electric vehicle tariff, so meter status decides who can take that plan.
- Fixed terms run for 12 months only, so no longer fixed term is listed for anyone wanting a rate locked for years.
- Supply covers GB only, so a household outside that market has to look elsewhere.
ENTEGA
Pros
- Renewable content is 100% across the electricity range, so the fixed and green options sit at the same standard.
- A smart meter is not required, so metering hardware is not a barrier for households without one.
- Both fuels come from one supplier, with electricity and gas listed in the same portfolio.
Cons
- Renewable claims rest on certificates rather than stated own generation, so the green attribute depends on the certificate market.
- Terms are limited to 12 and 24 months and fixed, dynamic and green carries no variable option, where Powerpeers lists dynamic, fixed and variable.
- Supply is confined to DE, so households outside that market cannot buy these tariffs.
Who each suits
100Green
Who it suits
- Households in GB that want renewable electricity and gas from one supplier.
- EV drivers who already have a smart meter or are ready to have one fitted.
- Anyone who may move mid-term and wants a free exit fee.
Who should look elsewhere
- Powerpeers, for a dynamic tariff: 100Green's list is fixed, variable and green, while Powerpeers runs dynamic, fixed and variable.
- Vattenfall, for a household that wants only fixed, green and variable choices, since Vattenfall lists fixed, green and variable without the vehicle and time-of-use options.
ENTEGA
Who it suits
- Households in DE who want renewable electricity without a long commitment, since fixed terms run 12 and 24 months.
- Gas and electricity customers who want one supplier and one support desk for both fuels.
- Anyone put off by metering hardware, since a smart meter is not required here.
Who should look elsewhere
- Households after a variable or tracker tariff, which fixed, dynamic and green does not list, where Powerpeers covers dynamic, fixed and variable.
- Prepay customers, because fixed, dynamic and green carries no prepay option and Electricity Ratings lists fixed, ev and time of use.
- Drivers seeking an electric vehicle tariff, which Endesa lists in fixed, time of use and ev.
Country by country
| Country | 100Green | ENTEGA |
|---|---|---|
| Germany | No | Yes |
| United Kingdom | Yes | No |
Questions about each
100Green
What does 100Green supply?+
100Green covers both fuels, with electricity and gas available from the same supplier, so a household using both does not need two providers. Renewable supply applies to the electricity side, and gas is bundled into the same account for homes that want one relationship.
Is the electricity genuinely renewable?+
Electricity is listed as 100% renewable, and the basis for that claim is a power purchase agreement. The green offer is tied to contracted renewable generation, which is the part buyers of green tariffs tend to ask about before they switch.
ENTEGA
What renewable content do ENTEGA's electricity tariffs carry?+
The renewable content is 100% on the electricity tariffs, so the green credentials apply to the range rather than to one specialist product. That matters for anyone comparing green suppliers, because the figure holds across the standard tariffs and not only the option labelled green.
How are the green claims backed?+
The basis is certificates, which means the renewable attribute is certified through certificates rather than through power the supplier generates itself. Buyers who weight own generation heavily may read that as a weaker claim, and it is worth asking the supplier directly about the sourcing behind the certificate.