Shell Energy may not sound familiar to you as they have only recently been renamed. First Utility, which began in 2008, was officially renamed and rebranded to Shell Energy in March 2019. They have become one of the biggest independent energy suppliers outside of the Big Six. They currently have around 850,000 customers and are growing bigger, fast.
Shell Energy came out with several innovative ideas that led to their fast growth - they were the first energy supplier in the UK to bring out smart meters. They also provide 100% renewable energy including wind, solar and biomass. They have made certain that for every unit of electricity used by one of their customers, a unit of renewable electricity is supplied to the grid.
It's important to know where your supplier gets their energy from: