Business Energy Suppliers

When it comes to choosing a business energy supplier you are spoilt for choice. 

As well as big and well-known suppliers like SSE and British Gas, there are smaller suppliers like Opus Energy and Dual Energy vying for your business.

There’s nothing wrong with choosing a big supplier because you know them, but the fact they are big does not necessarily mean they are right for you.
Better deals and more suitable energy contracts may be available from smaller suppliers, so it’s important to compare suppliers and shop around.

In-Depth Supplier Guides

Popular business energy suppliers in the UK:

  • British Gas
  • Opus Energy
  • EDF
  • E.ON
  • Scottish Power
  • SSE
  • Npower
  • British Gas Lite 
  • Green Network Energy 
  • Dual Energy

To help you find the right business energy supplier (we’ve also published a handy guide to choosing a business energy supplier here), we’ve listed all the top business energy suppliers below with a summary of what they offer. 

British Gas

British Gas is the UK’s biggest supplier of non-domestic gas and electricity with over 350,000 customers. They supply SMEs with fixed and variable gas and electricity, as well as large businesses who spend over £1m a year on business energy. 

  • Used by over 350,000 businesses
  • Fixed and variable tariffs
  • SME and large business energy 
  • 100% renewable electricity available
  • Fixed tariffs up to 3 years 
  • 30-day rolling contracts
  • Rated 3.7/5 on reviews site Trustpilot 


Opus Energy

Opus Energy is an independent supplier that deals exclusively in business energy. The company was founded in 2002, and they are the sixth-largest business energy supplier with over 275,000 non-domestic customers. 

  • Used by over 275,000 businesses
  • UK customer service
  • 100% renewable electricity available
  • Fixed tariffs up to 3 years
  • Variable tariffs also available 
  • Opus Advance Plus tariff supports UK renewable generators 
  • Rated 2.5/5 on reviews site Trustpilot 



EDF is a top business energy supplier with over 200,000 business customers and is one of the UK’s most recognisable energy brands. They are a member of the ‘big six’ and hold the best Trustpilot rating out of any member of the big six with a 4.5/5 rating.

  • Used by over 200,000 businesses
  • 7% discount if paying by Direct Debit 
  • Energy for micro-businesses and SMEs
  • Low carbon ‘nuclear’ energy
  • 100% green electricity available
  • Bulk buying contracts for larger businesses
  • Rated 4.5/5 on reviews site Trustpilot 



E.ON serves over 120,000 businesses and is a member of the ‘big six’. They started life out as Powergen but rebranded to E.ON in 2004. They mainly serve micro-businesses and SMEs, but they also offer large businesses bespoke solutions.

  • Used by over 120,000 businesses 
  • 100% renewable electricity for small businesses
  • Fixed tariffs up to 4 years 
  • 30-day variable tariffs
  • Free smart meters available to SMEs
  • Ranked best for complaints handling (Citizens Advice
  • Rated 3.7/5 on reviews site Trustpilot 


Scottish Power

Scottish Power serves over 80,000 non-domestic customers. They offer 100% green electricity where all electricity is generated by wind. They are Scotland’s favourite energy supplier and are a member of the ‘big six’.

  • Used by over 80,000 businesses 
  • Fixed tariffs up to 3 years 
  • Variable tariffs also available 
  • Energy for SMEs and large businesses
  • The largest self generator of onshore wind electricity 
  • Dedicated business customer service
  • Rated 1.1/5 on reviews site Trustpilot 



The domestic side of SSE was sold to Ovo Energy in 2020 but the non-domestic side continues to be operated by SSE Business Energy, who supply over 300,000 businesses with gas and electricity across the United Kingdom. 

  • Used by over 300,000 businesses
  • 100% green electricity and gas
  • Dedicated business customer service
  • Fixed tariffs up to 5 years 
  • 30-day rolling contracts available 
  • Smart meters for all eligible businesses
  • Rated 3.6/5 on reviews site Trustpilot 



Up until 2019, before the company was purchased by E.ON UK, npower was one of the UK’s top suppliers of non-domestic gas and electricity. It has since been announced that the npower brand will be wound down with customers transferred to E.ON. So, the brand as we know it today will no longer trade as it is. 


British Gas Lite

British Gas Lite is a separate entity to British Gas. They are a 100% online-based business energy supplier, supplying cheaper rates than British Gas (supposedly). They are estimated to serve around 8,000 micro and small businesses. 

  • Estimated to serve 8,000 businesses 
  • Launched in 2018 by Centrica 
  • Online only (no telephone)
  • Free smart meters (a smart meter is necessary for the supply of electricity) 
  • Only available to micro and small businesses 
  • Cheaper energy rates than regular British Gas
  • Rated 1.4/5 on reviews site Trustpilot 


Green Network

Green Network Energy is a top independent energy supplier with Italian roots, founded in 2003 by Piero Saulli and Sabrina Corbo. Their tariffs keep things simple with 100% green electricity available to eligible micro and small businesses. 

  • Estimated to serve around 1,000 businesses
  • Only suitable if you use less than 100,000 kWh (kilowatt-hour) a year
  • Gas and electricity tariffs
  • Fixed tariffs for 1 or 2 years
  • Over 50% renewables on standard tariffs
  • 100% green electricity available
  • Rated 4.2/5 on reviews site Trustpilot 


Dual Energy

Dual Energy is a top business electricity and gas supplier. They lead the way for smart meter technology, offering accurate billing and competitive prices. They offer free smart meters, fixed tariffs for up to 5 years, prepayment meters and normal meters

  • Estimated to serve over 2,000 businesses
  • Gas and electricity tariffs 
  • Fixed tariffs for 1, 2, 3, 4 or 5 years
  • Prepayment meters available 
  • Free smart meters 
  • Competitive prices 
  • Rated 4.4/5 on reviews site Trustpilot