100Green

This is 100Green, a renewable electricity and green gas supplier from Ware in Hertfordshire. You get a range of tariffs for fixed, variable, EV and smart homes, and a UK team that answers the phone.

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By Vouchernaut Editors, updated 14 October 2026.

100Green discount codes and deals, October 2026

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What a 100Green quote has to beat

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100Green doesn't publish its prices in a form I can use, so I can't cost its tariffs. Give me your postcode for the cheapest tariffs I hold for your home and the price cap, then set 100Green's quote against them.

Pricing a medium home: Direct Debit, gas and electricity.

100Green: what to know before you buy

The story

100Green is the trading name of Green Energy (UK) Ltd, based in Ware, Hertfordshire, and its site dates the company to 2001. It describes itself as a company with feeling, and says its staff are the same people who paint benches and clear footpaths in their spare time. It is a Which? Recommended Provider, according to its own site.

The energy

Its electricity is 100% renewable and generated in the UK, bought from small businesses and farms that produce green power. Its gas tariffs include a share of green gas, or biogas, made from organic waste such as manure and crops. 100Green says its 100 Origin tariff is the only one in the UK with independently eco-labelled, 100% green gas.

The tariffs

Sparkling Guarantee fixes your rates for a set term, while Sparkling Variable moves with the wholesale market. 100 Origin is the eco-labelled option. Tide EV gives cheaper overnight charging for electric cars, Tide Lifestyle has low daytime and evening rates, and Tide Smart suits homes with solar panels or a battery. There is also an export tariff for home generation, and prepayment meters are supported.

Switching

You get a quote on its site, then it handles the switch with your old supplier. If your previous supplier raises an objection, such as an unpaid balance, the switch can take longer. You have a 14-day cooling-off period after signing up, and 100Green says there are no exit fees on its tariffs.

Saving

Energy prices depend on your region, meter and how much you use, so the quick route is to get a personalised quote and compare it with your current bill. Check the unit rate and the standing charge, not just the headline. Any live code or deal is listed on this page.

Support

It says it has no chatbots or phone menus, so you reach a person in its UK team by phone, email or webchat. It also publishes help for moving home, meter readings, the Priority Services Register and bereavement.

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Questions about 100Green

Are there any 100Green discount codes?

We don't currently list a confirmed discount code. That doesn't mean the store has no promotions; check its website for current prices.

Is 100Green electricity really renewable?

Its site says all its electricity is 100% renewable and generated in the UK. Its 100 Origin tariff also carries an independent eco-label and 100% green gas.

Does 100Green charge exit fees?

No. It says there are no exit fees on its tariffs, so you can leave if you find a better deal.

How long does it take to switch to 100Green?

It starts the switch straight away once you sign up. It says the switch usually completes within five working days, but it can take longer if your old supplier objects or more details are needed.

Can I change my mind after signing up to 100Green?

Yes. There is a 14-day cooling-off period, and you can ask it not to start the switch until that has passed.

Does 100Green offer tariffs for electric cars?

Yes. Tide EV is built around cheaper overnight charging, and the Tide Smart tariff suits homes with solar panels or a battery.

Who handles my order?

You complete your purchase with the retailer. For order changes, delivery questions or a refund, contact the seller shown on your order confirmation. Vouchernaut publishes shopping guides and offers; we don't process your purchase.

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