100Green
Independent sustainable energy company
Green Energy (UK) Ltd, operating as 100Green, is a British independent-energy company based in Ware, Hertfordshire. It was established in 2001 by CEO Douglas Stewart. The company provides Ofgem-certified renewable electricity and green gas to domestic and business customers throughout Great Britain. It is currently the only energy supplier in the UK to offer 100% green gas.
100Green is distinct from Green Supplier Limited and Green Network Energy, which ceased trading in 2021.
About
100Green offers 100% green gas to both domestic and business customers. It has a special exemption from Ofgem's price cap due to its commitment to renewable energy, which incurs higher operational costs. 100Green was the first private UK company to distribute free shares to its customers, a program that has since ended, but some customers remain as shareholders.
Fuel mix
The EKO Tariff offered by 100Green has received independent certification from EKOenergy, a global non-profit ecolabel focused on renewable energy. This ecolabel signifies that the consumed energy meets extra sustainability and quality standards set by a network of environmental NGOs.
This brief starts where responsible research should: with the source description of “100Green” as independent sustainable energy company. Everything that follows is an evidence route, not borrowed authority.
Why this record matters
The subject matters to the history & society register because the source frames it as independent sustainable energy company. Its deeper value depends on whether names, dates, institutions and citations support that framing.
Chronology, provenance and viewpoint should be read together before a broad social or political interpretation is accepted. The source revision retrieved here is dated May 26, 2026. The linked authority identifier is Q5602510. 1 of 2 selected statements include explicit references; 0 carry qualifiers and 0 use preferred rank. The first chronological checks are 2001 and 2021.
Official terminology may obscure informal participation, dissent or communities documented only indirectly. The lead is largely declarative, so disagreement and counter-evidence require a deliberate search beyond the opening account. Authority statements aid reconciliation but still require their own references, qualifiers and ranks to be checked.
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Three-step research path
- Establish the record: confirm the title “100Green”, its source revision and the description used here.
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Questions for further research
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This entry incorporates text from “100Green” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.