So Energy

So Energy, renewable electricity supplier for British homes

So Energy is a UK energy supplier operating under So Energy Trading Limited, registered in England and Wales with number 09263295. The company launched in 2015 with the stated aim of improving the energy market for British households and, according to its own communications, serves around 300,000 customers. Its activity centres on renewable-source electricity, smart tariffs and solar solutions, with customer service provided from within the UK.

100% renewable electricity and tariffs

100% renewable electricity is the standard across all the company's fixed-price tariffs. The tariff range shown on the site includes several options designed for different profiles:

• Fixed: fixed-price tariff, aimed at those seeking price certainty.
• Flex: tariff with greater freedom of terms.
• Tracker: tariff that updates its prices in line with the price cap and which the company presents as guaranteeing savings against that cap.
• EV: tariff with reduced off-peak rates for electric vehicle charging.

The company states that its fixed tariffs are usually among the best value in the country, an assessment that corresponds to its own presentation. The site also reports that the So Flex and So Green Tracker tariffs are affected by the price cap increase scheduled for 1 October, and a temporary reduction in electricity VAT from 5% to 0% applicable to all its customers.

Solar, batteries and electric vehicle charging

The company sells solar installations with battery and offers financing of the installation cost from £75 a month with no deposit, according to data published on its website. The company's material puts potential savings at up to 70% of the electricity bill, a calculation based on a £9,310 system comprising eight 505 W panels and a 5 kWh battery, on a south-facing roof in London, with a rate of 26.35 pence per kWh and an export payment of 0.15 pence per kWh; the MCS estimate of 3,975 kWh per year would cover 70% of the consumption of a typical 3,500 kWh household, saving £37,602 over 25 years.

In the electric vehicle area, the company offers chargers compatible with solar installations, with an upfront payment of £99 and the rest after installation, plus year-round technical support. The offer is completed by the specific tariff for home charging.

Heating and home protection

So Energy includes heat pump heating solutions in its range and a Home Cover service aimed at reducing unexpected repair costs, with boiler protection. The company presents this service as a way to cover home maintenance costs for its customers.

Customer participation and rewards programme

The company allows its customers to vote on which renewable technologies they want it to invest in — solar, wind, hydro or biomass — and its team counts the votes so that the chosen option is covered by a UK-based generator. On the commercial side, it runs a loyalty programme with regular prize draws and a referral programme that gives £50 in energy credit to both the customer and the person referred when the latter's supply starts with the company.

Digital tools and customer service

Customers have an app to check their balance, pay bills, submit meter readings and get answers to questions via live chat. The company also offers management services such as submitting readings, handling complaints, moving home support and troubleshooting technical issues with the in-home display (IHD).

Track record and awards

The company reached ten years in 2025. Highlights of its journey include the development of its own technology platform and the launch of So Unique, which it presents as the UK's first personalised energy tariff. As for awards, the site notes a Special Commendation for Best Overall Improvement at the Uswitch Energy Awards 2026, its inclusion among The Sunday Times Best Places to Work in 2024, 2025 and 2026 in the Big Organisation category, and its shortlisting for the Environmental, Social and Governance Initiative of the Year Award at the Utility Week Awards. The company also notes that more than 22,000 customers rate it as excellent on Trustpilot.

Regulation and financing

So Energy is authorised and regulated by the Financial Conduct Authority under reference number 935278 to act as a credit broker, not a lender, and offers consumer finance through Tandem Bank Limited and HTG Finance Limited.

Location and contact

Studio 2, Power Road Studios, 114 Power Road, Chiswick, W4 5PY