SmartestEnergy is a next generation energy company, supporting smart businesses through the transition to a decentralised energy system.

The UK energy revolution is happening now. Our business model is helping to develop a smart energy system enabled by distribution connected renewable generation and flexible energy consumption.


As the UK’s leading purchaser of independent generation, supplier of renewable electricity, and provider of demand response services, SmartestEnergy is perfectly placed to help smart businesses achieve their energy goals. With expertise across the UK energy landscape, we help businesses to see the big picture.

Established in 2001, SmartestEnergy is a wholly owned subsidiary of the Marubeni corporation. We’re a stable, well-resourced business with an independent voice to recommend what’s best for our customers.

> Download our company factsheet

Business electricity

Smart businesses recognise the benefits of buying renewable power, so we supply independently certified renewable electricity to some of the UK’s leading brands. Contracts are designed around the customer, offering flexible purchasing options and access to trading.

> Find out how our electricity supply could power your business

Power purchase

The UK is no longer powered by a small number of large fossil-fuelled power stations. We partner with a network of independent energy entrepreneurs who are building a cleaner, more decentralised and resilient energy system.

> Find out how our Power Purchase Agreements could work for your business

Energy flexibility

In the new energy landscape, balancing the grid is everyone’s priority. We help businesses see energy as an asset that can be managed intelligently to create additional value. Our team harness the flexibility of both end consumers and energy generators, identifying the most effective market opportunities for each project.

> Find out how you can become a more active energy participant