Energising a cleaner future

At Exagen, we are building the next generation of utility scale solar farms co-located with grid-balancing battery storage facilities.

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We take an integrated approach to pairing solar farms with battery systems, which enhances our value proposition. This is achieved by balancing revenue from solar exports whilst exploiting battery flexibility services.

A robust platform

Our platform is a build, own and operate model underpinned by our in-house proprietary software. This streamlines the development process at each stage, reduces risk and ultimately boosts project returns.

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The power of partnership

Our partnership ethos is built on trust and developing stakeholder relationships, taking the time to understand and accommodate their objectives or concerns. By forging strong partnerships with landowners and local communities, we develop and build projects around their needs.

We prioritise and focus our resources on a select number of projects each year, enabling us to plan our projects smoothly, from origination through to operation.

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Capability

We have the capacity to construct over 400MW of solar and battery projects annually, backed by Power Purchase Agreements. This enables us to deliver predictable long-term revenues.

Our experienced team is passionate about the ongoing energy transition to renewables and the positive impact it will have on the environment. Collectively in our former roles, we’ve raised over £1 billion to fund renewable projects and have been responsible for developing, constructing and operating circa 5GW of renewable generation assets.

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Our team

Senior management team

Exagen is led by a strong management team with a wealth of experience in the renewable energy, power, banking and private equity sectors.

Jeremy Littman
Jeremy Littman Founder & Chief Executive Officer
Paul Massara
Paul Massara Non-Executive Chairman
James Owen
James Owen Managing Director
Guy Ranawake
Guy Ranawake Chief Financial Officer
Stelios Vassileou
Stelios Vassileou Finance Director
David Kemp
David Kemp Non-Executive Director
Simon Harris
Simon Harris Non-Executive Director
  • Jeremy previously founded Engenie (now Osprey Charging), an EV charging business which realised a £35m equity investment in 2019 achieving an 8x multiple return for early investors. His engineering career spans 20 years using and delivering smart technology solutions within the design, development and construction of large-scale multi-disciplinary projects. Jeremy leads the team at Exagen, balancing his technical, corporate finance and commercial experience in building the group into a sustainable high-growth venture.
  • Paul has extensive experience in the energy, finance and service sectors in Europe and North America and holds various Chair and Government advisory roles. His former roles include: UK CEO and Chair of RWE npower and President of Centrica Direct Energy. Paul has a Masters in Corporate Finance from the London Business School.
  • James has a strong track record in the multi-tech development of over 1.5GW of assets. With previous roles at Savills, Low Carbon, Public Power Solutions and Kronos, he has proven experience in risk mitigating development methodology.
  • Guy is a highly experienced renewable energy and infrastructure-focused finance professional and Chartered Accountant (ACA). His previous roles include: Chief Financial Officer (Gravitricity), Fund Manager (Ingenious), Corporate/Project Financier (Evercore, Barclays, Citi), Accountant (PWC).
  • Stelios is a Chartered Management Accountant (FCMA) with approximately 30 years’ experience in integrated utilities, retail entities and generation technologies within the power sector. He specialises in solar and other renewables in the UK and emerging markets (Africa and Central Asia).
  • David brings a track record in project finance and a wealth of debt placement capabilities to the team. He’s a former MD of M&G Investments’ Project and Infrastructure Finance team. At M&G he originated, structured and executed private senior and mezzanine debt across the energy and infrastructure sectors and supported the fund managers of a c.£45bn infrastructure debt portfolio, the largest of any lender globally. David is a CFA Charterholder and a member of CPA Australia.
  • Simon has enjoyed a 25-year career in the distressed corporate markets as a hands-on Business Administrator and Investor/Lender. He has a wealth of experience across many industrial sectors, helping debt and equity stakeholders through intense episodes of change to save, stabilise or build value. Simon is a Chartered Accountant (qualified with Deloitte).
Jeremy Littman
Jeremy Littman Founder & Chief Executive Officer
  • Jeremy previously founded Engenie (now Osprey Charging), an EV charging business which realised a £35m equity investment in 2019 achieving an 8x multiple return for early investors. His engineering career spans 20 years using and delivering smart technology solutions within the design, development and construction of large-scale multi-disciplinary projects. Jeremy leads the team at Exagen, balancing his technical, corporate finance and commercial experience in building the group into a sustainable high-growth venture.
Paul Massara
Paul Massara Non-Executive Chairman
  • Paul has extensive experience in the energy, finance and service sectors in Europe and North America and holds various Chair and Government advisory roles. His former roles include: UK CEO and Chair of RWE npower and President of Centrica Direct Energy. Paul has a Masters in Corporate Finance from the London Business School.
James Owen
James Owen Managing Director
  • James has a strong track record in the multi-tech development of over 1.5GW of assets. With previous roles at Savills, Low Carbon, Public Power Solutions and Kronos, he has proven experience in risk mitigating development methodology.
Guy Ranawake
Guy Ranawake Chief Financial Officer
  • Guy is a highly experienced renewable energy and infrastructure-focused finance professional and Chartered Accountant (ACA). His previous roles include: Chief Financial Officer (Gravitricity), Fund Manager (Ingenious), Corporate/Project Financier (Evercore, Barclays, Citi), Accountant (PWC).
Stelios Vassileou
Stelios Vassileou Finance Director
  • Stelios is a Chartered Management Accountant (FCMA) with approximately 30 years’ experience in integrated utilities, retail entities and generation technologies within the power sector. He specialises in solar and other renewables in the UK and emerging markets (Africa and Central Asia).
David Kemp
David Kemp Non-Executive Director
  • David brings a track record in project finance and a wealth of debt placement capabilities to the team. He’s a former MD of M&G Investments’ Project and Infrastructure Finance team. At M&G he originated, structured and executed private senior and mezzanine debt across the energy and infrastructure sectors and supported the fund managers of a c.£45bn infrastructure debt portfolio, the largest of any lender globally. David is a CFA Charterholder and a member of CPA Australia.
Simon Harris
Simon Harris Non-Executive Director
  • Simon has enjoyed a 25-year career in the distressed corporate markets as a hands-on Business Administrator and Investor/Lender. He has a wealth of experience across many industrial sectors, helping debt and equity stakeholders through intense episodes of change to save, stabilise or build value. Simon is a Chartered Accountant (qualified with Deloitte).

Delivery team

Our delivery team has decades of engineering experience combined with mechanical and electrical expertise. This enables us to develop resilient solutions for long-term energy performance, efficiency and security.

Neil Buck
Neil Buck Head of Operations
Mark Rowcroft
Mark Rowcroft Development Director
Yazan Abawi
Yazan Abawi Technical Manager
Hugo Charteris
Hugo Charteris Project Developer
Flavia Bernabo
Flavia Bernabo Project Developer
Mostafa Azizkhani
Mostafa Azizkhani Geospatial Developer
Edward Shuttleworth
Edward Shuttleworth Land Acquisition Manager
  • Neil is a highly experienced Renewable Energy Engineer with over 20 years in the renewable industry. The former MD of Brighter Green Engineering and Head of Operations at Belectric, Neil established his EPC experience and extensive knowledge of O&M for grid connected infrastructure. He’s responsible for constructing over 300MW of UK assets and maintaining one of the UK’s largest solar portfolios for Foresight.
  • Mark has spent 20 years in land development and has extensive experience of identifying, designing, consenting and delivering successful land development projects, including wind, solar, energy storage and thermal. He previously worked at Banks Renewables for 18 years holding various roles in development, technical design and construction project management across multiple asset classes. He holds a HNC Electrical & Electronic Engineering, BA (Hons), Industrial Design from Teesside University.
  • Yazan is a highly technical and solution-oriented Manager with over 10 years of experience in solar generation and power distribution systems. Previously at SSE for 6 years, Yazan honed his contract negotiation skills and combined his knowledge of DNO's ICP tender processes with excellent technical experience of solar development, site optimisation and best practice internationally. He is a Chartered engineer CEng.
  • Hugo is a Project Development Coordinator, working as part of the Exagen team to deliver utility scale renewable energy projects. He entered the renewables space after completing his BEng in Civil Engineering at the University of Exeter. Hugo is hugely motivated to help the UK achieve its net zero carbon goal.
  • As a Project Development Coordinator with Exagen Development, Flavia is part of the team that develops utility scale renewable energy projects, from initial conception right through to final completion. She completed her BASc: Science and Engineering degree at UCL in London, UK and UCF in Freiburg, Germany.
  • An experienced Geospatial Information Systems Analyst, for over 7 years Mostafa has worked and conducted research in the field of solar energy potential mapping on large and small scales, using geospatial tools and methods.
  • Edward has worked in the energy sector since 2008 with project assets including waste to energy, gas peakers, solar and storage. Throughout his career, Edward has sourced and managed a pipeline of several hundred megawatts focusing on capacity market contracts and more recently subsidy free solar developments. He joined the team in September 2021 and will be working alongside clients throughout the development process, managing sites from inception to completion.
Neil Buck
Neil Buck Head of Operations
  • Neil is a highly experienced Renewable Energy Engineer with over 20 years in the renewable industry. The former MD of Brighter Green Engineering and Head of Operations at Belectric, Neil established his EPC experience and extensive knowledge of O&M for grid connected infrastructure. He’s responsible for constructing over 300MW of UK assets and maintaining one of the UK’s largest solar portfolios for Foresight.
Mark Rowcroft
Mark Rowcroft Development Director
  • Mark has spent 20 years in land development and has extensive experience of identifying, designing, consenting and delivering successful land development projects, including wind, solar, energy storage and thermal. He previously worked at Banks Renewables for 18 years holding various roles in development, technical design and construction project management across multiple asset classes. He holds a HNC Electrical & Electronic Engineering, BA (Hons), Industrial Design from Teesside University.
Yazan Abawi
Yazan Abawi Technical Manager
  • Yazan is a highly technical and solution-oriented Manager with over 10 years of experience in solar generation and power distribution systems. Previously at SSE for 6 years, Yazan honed his contract negotiation skills and combined his knowledge of DNO's ICP tender processes with excellent technical experience of solar development, site optimisation and best practice internationally. He is a Chartered engineer CEng.
Hugo Charteris
Hugo Charteris Project Developer
  • Hugo is a Project Development Coordinator, working as part of the Exagen team to deliver utility scale renewable energy projects. He entered the renewables space after completing his BEng in Civil Engineering at the University of Exeter. Hugo is hugely motivated to help the UK achieve its net zero carbon goal.
Flavia Bernabo
Flavia Bernabo Project Developer
  • As a Project Development Coordinator with Exagen Development, Flavia is part of the team that develops utility scale renewable energy projects, from initial conception right through to final completion. She completed her BASc: Science and Engineering degree at UCL in London, UK and UCF in Freiburg, Germany.
Mostafa Azizkhani
Mostafa Azizkhani Geospatial Developer
  • An experienced Geospatial Information Systems Analyst, for over 7 years Mostafa has worked and conducted research in the field of solar energy potential mapping on large and small scales, using geospatial tools and methods.
Edward Shuttleworth
Edward Shuttleworth Land Acquisition Manager
  • Edward has worked in the energy sector since 2008 with project assets including waste to energy, gas peakers, solar and storage. Throughout his career, Edward has sourced and managed a pipeline of several hundred megawatts focusing on capacity market contracts and more recently subsidy free solar developments. He joined the team in September 2021 and will be working alongside clients throughout the development process, managing sites from inception to completion.