100Green vs Good Energy: Which Green Supplier Is Better in 2026?

Choosing between 100Green and Good Energy means comparing two of the UK’s most environmentally focused energy suppliers. Both supply electricity matched with 100% renewable generation, offer smart tariffs and support household renewable technology. However, they differ considerably in customer service, green gas, EV charging, solar export payments and tariff flexibility.

100Green stands out for its 100% renewable gas option, no-exit-fee policy and market-leading customer-service score. Good Energy offers a broader low-carbon home ecosystem, including EV charging, heat-pump tariffs, solar panels, batteries and premium export payments.

This 100Green vs Good Energy comparison explains which supplier is better for prices, renewable energy, customer support, smart tariffs, electric vehicles, solar exports and overall value.

Quick Comparison: 100Green vs Good Energy

Actual prices vary by postcode, annual consumption, meter type and payment method. Customers should compare personalised annual estimates rather than relying only on advertised features.

1. Which Supplier Has Better Energy Prices?

Neither 100Green nor Good Energy is guaranteed to be cheaper. Their main environmentally enhanced tariffs can sit above or below Ofgem’s price-cap rates because both suppliers receive exemptions for products that provide additional support to renewable generation. A personalized quote is therefore essential.

From 1 July to 30 September 2026, Ofgem’s price-cap benchmark is £1,862 for a typical dual-fuel household paying by Direct Debit. Average electricity rates are 26.11p/kWh with a 57.19p daily standing charge. Gas averages 7.33p/kWh plus 29.04p per day. The cap limits rates rather than total bills.

100Green Pricing

100Green’s Sparkling Variable tariff follows wholesale-market movements rather than changing automatically with every quarterly price-cap period. The supplier explains that this tariff may sometimes cost more or less than the Ofgem benchmark because it has a green-tariff derogation.

Sparkling Guarantee provides guaranteed unit rates for 12 months. Unlike many fixed deals, it has no exit fee, allowing customers to leave without an early termination charge. Both Sparkling options include 100% renewable electricity and at least 10% certified green gas.

Good Energy Pricing

Good Energy Standard is also exempt from the price cap. Good Energy says the exemption reflects the additional cost of buying power directly from more than 3,300 independent renewable generators through longer-term agreements. Its rates can therefore be above or below capped prices.

Good Energy also offers a fixed tariff, although contract length, exit fees and regional prices should be confirmed through a live quote. Its current range includes Standard, Good Energy Fix, EV Charge and a heat-pump tariff.

Pricing Verdict

100Green is better for customers who value freedom from exit fees. Good Energy may offer better value when its specialist tariff matches an EV, heat pump or solar system.

The most important number is the total estimated annual cost after standing charges, exit fees and expected off-peak usage.

2. Who Offers Better Fixed and Smart Tariffs?

100Green offers more unusual time-of-use structures, while Good Energy provides tariffs designed around specific technologies. 100Green suits households able to move several activities into cheaper periods. Good Energy is more practical for customers who specifically own an electric vehicle or heat pump.

100Green Tariffs

100Green’s principal options include:

• Sparkling Variable
• Sparkling Guarantee
• EKO
• Tide Lifestyle
• Tide Smart
• Tide EV, which is currently unavailable

Tide Lifestyle offers nine lower-rate hours each day and two hours of free electricity every Sunday from midday to 2pm. Its cheaper windows include overnight, afternoon and evening periods. It requires a compatible smart meter and has no exit fee.

Tide Smart provides seven lower-rate overnight hours from midnight to 7am. Weekday electricity becomes most expensive between 4pm and 8pm, so the tariff primarily benefits homes with batteries, solar panels or automated energy-management systems.

Good Energy Tariffs

Good Energy’s EV Charge tariff provides five cheaper hours from midnight to 5am. Its heat-pump tariff offers lower-cost periods from 5am to 9am and 1pm to 4pm, helping eligible households heat their homes outside more expensive periods.

These tariffs require a communicating smart meter capable of supplying half-hourly readings. EV customers must also own or lease an eligible electric or plug-in hybrid vehicle charged at home.

Smart-Tariff Verdict

Choose 100Green for flexible time-of-use plans and free Sunday electricity. Choose Good Energy for a straightforward technology-specific EV or heat-pump tariff.

3. Is 100Green Greener Than Good Energy?

Both suppliers report electricity fuel mixes containing 100% renewable power and zero operational carbon emissions. The main difference is gas: 100Green offers the UK’s only tariff with both 100% certified renewable electricity and 100% certified green gas, giving it a clear advantage for dual-fuel households.

100Green’s 2024–25 fuel disclosure reports:

Its renewable electricity comes from sources including wind, solar, hydro, biomass and anaerobic digestion.

All 100Green tariffs include at least 10% certified green gas. Its EKO tariff uses 100% certified green gas produced from naturally decomposing organic waste, alongside renewable electricity. EKO also applies environmental criteria intended to protect sensitive habitats and wildlife.

Good Energy’s April 2025–March 2026 fuel mix is also 100% renewable:

Good Energy buys power directly from more than 3,300 British generators and says it matches customer demand with renewable generation in the same half hour 88% of the time. Its greener gas includes at least 10% biogas, while remaining customer gas emissions are offset through certified projects.

Green Energy Verdict

100Green wins for green gas, especially through EKO. Good Energy wins for transparent direct sourcing and strong half-hourly electricity matching.

For electricity-only customers, both are credible renewable suppliers.

4. Which Supplier Is Better for EV Charging?

Good Energy is currently the more practical EV supplier because its EV Charge plan is available with a clearly advertised 8p/kWh overnight rate. 100Green has developed strong EV and smart-home tariffs, but its dedicated Tide EV product is currently unavailable.

Good Energy EV Charge provides five hours at 8p/kWh between midnight and 5am. The tariff uses 100% renewable electricity, requires a communicating smart meter and works for customers who own or lease an eligible EV or plug-in hybrid.

The current fixed EV product has a 12-month term, and tariff labels indicate that an exit fee may apply. Customers should compare its daytime rate and standing charge alongside the 8p overnight price.

100Green’s Tide EV was designed to provide five lower-rate hours from midnight to 5am with no exit fee and compatibility across EV and charger brands. However, the supplier currently marks the dedicated tariff as unavailable.

EV owners may still consider Tide Smart, which provides seven cheaper overnight hours. Its actual regional rate must be obtained through a quote, and households must avoid the expensive weekday 4pm–8pm period to maximise savings.

EV Verdict

Good Energy wins for EV charging because its available tariff combines a transparent 8p rate with five renewable overnight hours.

5. Which Supplier Has Better Customer Service?

100Green is the clear customer-service winner. Citizens Advice ranked it first among rated suppliers for January to March 2026, with strong scores across complaints, waiting times, billing, smart-meter performance and customer commitments.

100Green recorded 14.4 complaints per 10,000 customers and achieved the highest overall rating in the comparison.

Good Energy still performed strongly, particularly for low complaint volumes and billing accuracy. Its weaker waiting-time and customer-commitment results caused it to rank below 100Green.

Customer-Service Verdict

100Green wins comfortably. Good Energy remains above many larger suppliers, but 100Green’s faster contact and stronger overall commitments make it the better choice for support.

6. Which Supplier Pays More for Solar Exports?

Good Energy offers the highest premium solar-export payment, while both suppliers provide a 12p/kWh option for eligible existing systems. Good Energy is stronger for customers buying a complete solar-and-battery installation, whereas 100Green provides a straightforward export arrangement for its electricity customers.

100Green currently pays 12p/kWh for qualifying exported renewable electricity. Customers must buy their imported electricity from 100Green, use an eligible export meter and have a qualifying system of no more than 15kW. The arrangement is not formally a Smart Export Guarantee tariff and has no fixed contract term.

Good Energy’s Solar Savings tariff pays 12p/kWh to eligible electricity-supply customers. Solar Savings Exclusive pays up to 25p/kWh for 12 months when qualifying solar panels and battery storage are installed through Good Energy. Customers then move to the standard export rate.

Solar Verdict

Good Energy wins for premium exports and complete solar installations. The standard 12p rates are effectively a tie for eligible customers.

7. Which Supplier Has the Better App and Home-Energy Ecosystem?

Both suppliers provide apps and online accounts for routine energy management. Good Energy offers more detailed historical usage tools and connects energy supply with solar, batteries, EV chargers and heat pumps. 100Green’s app covers the main account and meter-reading functions without the same installation ecosystem.

The 100Green app allows customers to submit readings, while its online account supports billing and account management. Smart meters automatically send readings and include an in-home display for tracking consumption.

Good Energy’s app shows historical electricity and gas consumption in units and cost, with daily, weekly and monthly views. Customers can also submit readings, view bills and make payments.

Good Energy additionally installs solar panels, batteries, heat pumps and EV chargers. This gives households one provider for energy supply and several low-carbon home technologies.

Digital Verdict

Good Energy wins for detailed usage information and its broader home-energy ecosystem.

Who Should Choose 100Green?

100Green is better for customers who prioritise:

• Market-leading customer service
• No exit fees
• 100% certified green gas
• Free Sunday electricity
• Flexible time-of-use tariffs
• Ethical renewable sourcing without a large home-services ecosystem

Who Should Choose Good Energy?

Good Energy is better for customers who want:

• A currently available 8p EV tariff
• A dedicated heat-pump tariff
• Solar panels and battery installation
• Premium solar-export payments
• Detailed app-based usage tracking
• Direct support for thousands of independent British generators

Final Verdict: 100Green or Good Energy?

100Green is the better supplier for customer service, contract flexibility and green gas. Its first-place Citizens Advice rating, no-exit-fee policy and unique EKO tariff make it particularly attractive to environmentally conscious dual-fuel households.

Good Energy is the better supplier for low-carbon technology. Its available EV and heat-pump tariffs, solar installations, batteries and premium export rate give it a more complete smart-home offering.

Overall, choose 100Green for support and genuinely renewable gas. Choose Good Energy for EVs, heat pumps, solar panels and battery storage. Compare personalised annual quotes before switching because both suppliers’ green tariffs may sit above or below Ofgem’s benchmark.

Compare UK energy suppliers, tariffs and deals to find the right option for your home.

Frequently Asked Questions

These FAQs compare both suppliers on price, service, green energy, EV tariffs, solar export rates, and exit fees to help you decide which option may suit you better.