Clients and Testimonials

We have worked with hundreds of clients over the years, including:


Energy companies


Technology developers


Policy makers and shapers

As we help them navigate the transformation of the energy sector, towards a low-carbon, decentralised future, we are always keen to find out more about what they think about the research we provide, and welcome any suggestions they may have for future topics.

To give you an idea of what we really do and how well we do it, you can find out more about the feedback we have received
and the types of clients we work for right here.



We have a track record for impressing clients and we secure a large proportion of repeat business from them.

Listed below are some of the companies that we have supported or advised.

Energy companies
  • Avanti Gas, UK
  • BC Hydro, Canada
  • BP Alternative Energy BP LPG
  • British Gas, Centrica
  • Calor Gas, UK
  • CEATI International, Canada
  • Chevron, USA
  • Chubu Electric, Japan
  • ConocoPhillips, USA
  • CRIEPI, Japan
  • EDF Energy, UK
  • Edison, Italy
  • EiFER, France / Germany
  • Electrabel, Belgium
  • Electricité de France, France
  • Electric Ireland
  • Endesa, Spain
  • ENECO, Netherlands
  • ENGIE, France/Belgium
  • Enmax, Canada
  • E.ON, UK, Germany
  • EWE, Germany
  • ExxonMobil
  • GasTerra, The Netherlands
  • Gasunie, The Netherlands
  • Gazprom
  • Hydro One, Canada
  • Iberdrola, Spain
  • National Grid, UK
  • Naturgy, Spain
  • Nippon Oil, Japan
  • Origin Energy
  • Osaka Gas, Japan
  • Power NI, Northern Ireland
  • RWE, Germany
  • RWE Fuel Cells, Germany
  • RWE npower, UK
  • Schneider Electric
  • Scottish and Southern Energy, UK
  • Scottish Power/Iberdrola
  • SHV Gas, the Netherlands
  • Southern California Edison, USA
  • Statoil, Norway
  • Tendril
  • Tokyo Gas
  • Vattenfall, Sweden
  • Wisconsin Public Service, USA

  • Testimonials


    Delta-ee is clearly staffed by people with a deep knowledge and understanding of the sector - the quality of the input data, analysis and conclusions is second to none... any resultant subsequent work will only be offered to one provider.

    Delta-ee provides us with ongoing, first-class insight and advice.

    Delta-ee's heat pump expertise and insight helps us get behind the market data, and challenges our views. We use them regularly.

    Danfoss Heat Pumps

    We have used Delta-ee's services on a number of occasions to help us develop our decentralised energy businesses. On each occasion Delta-ee has provided us with first-rate analysis.

    E.ON UK

    Great insight into different markets and a significantly better view of the technological opportunities and challenges than less specialised consulting firms.

    Delta-ee is professional and efficient in delivering global projects to scope, budget and aggressive timescales.

    Delta-ee's market knowledge and insight into the factors affecting our decision making has helped us immensely.

    Delta-ee provides very accurate analysis and excellent value for money.

    Thanks for sending the Delta-ee study, which is excellent (as Delta-ee work always is).

    The real value of the service lies in the ability to really understand the customer and the technology together.

    Thank you for an excellent service - I think the time and effort you made to really understand our needs was exceptional.

    Delta-ee has an incredible strong network and a really high level analysis of the HVAC market worldwide. Newsletter, specific studies and conferences always gather “top of the bucket” persons to provide a high value output. We work with them nearly since the beginning and are more than happy to see their team growing. Last (but not least), their human approach and their willing to gather people to go ahead together is very valuable !

    We have found the Delta-ee Heat Insight Service invaluable this year. Steven and the team are great to work with and they have really listened to our business requirements and considered how they can help. The way they translate large research projects into commercial summaries has really helped my team in translating the results into tactical validated activity.

    Avanti Gas

    Case studies

    case studyIndividual case studies can be found on each section of our Consultancy web pages.

    If you'd like any further information, just let us know.


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