In October’s magazine, Which? reviewed 24 supposedly green energy suppliers. 9 supply 100% renewable energy to domestic customers;
Bulb, Co-operative Energy, Ecotricity, Eagle, Foxglove Energy, Good Energy, Green Energy, Green Star Energy, Octopus Energy, Pure Planet, So Energy, Tonik Energy and Yorkshire Energy.
Of these, Ecotricity, Eagle (whose overall mix is only 34% renewable, as they mainly supply non-domestic customers) and Good Energy generate their own renewable energy.
Figures are mainly based on the year 2017-18, from the companies’ own websites.