About MCS

MCS is a mark of quality and demonstrates compliance to industry standards that companies strive to meet. It highlights to consumers that companies are able to consistently install or manufacture to the highest quality every time.

Novation Statement

Establishing the Microgeneration Certification Scheme (MCS) as independent of government is aligned with the government’s strategy of enabling the renewables market to be sustainable in the long-term.

We are pleased to announce that this process is now complete. The MCS has been made independent of government. This took place on April 25th, 2018.

The MCS was set up by the government in 2007 to certify small scale renewable electricity and heat products and installers to provide assurance to consumers about the quality and standard of their installations. They are also provided with consumer protection. It covers technologies such as solar PV, biomass, heat pumps, and wind.

MCS exists to support quality assurance in microgeneration in order to grow the market for these solutions. The standards are developed by technical working groups, with members from industry who contribute their valuable time and expertise on a voluntary basis.

MCS has certified over a million installations since it was launched in 2007 and has nearly 2,000 installers currently registered. The scheme has played an important part in the growth of the installation of renewables in homes and small businesses in the UK.

The MCS has been transferred to the MCS Service Company Limited, and the MCS Charitable Foundation.

For more information about the MCS, see https://www.microgenerationcertification.org

The Department wishes to thank all parties who have contributed to the development and success of the MCS.

The MCS Scheme has helped to drive up standards and to pave the way for the growth in low carbon electricity and heating in people’s homes.

Transfer of the MCS to the MCS Charity and MCS Service Company is an important step towards ensuring the sustainability of renewables and energy efficiency consumer markets in the long-term. The Department is proud of the contribution the scheme has made in the renewables sector and is confident of its continuing influence now that it is independent of government.

BEIS remains committed to the Scheme and will continue to engage in the activities of the MCS on an arm’s length basis through its role in the Stakeholder Advisory Group, which also includes a range of industry and consumer stakeholders. The Stakeholder Advisory Group’s role is to offer advice to the Company regarding the running of the MCS. It will not have the capacity for decision-making, however. The directors of the Company will be responsible for decisions made.

In line with the recommendation published on the Each Home Counts website, MCS and Trustmark are working together to deliver the Quality Mark, which is part of the quality and standards framework planned through this review.

The Charity’s vision is a world where everyone has access to affordable and reliable renewable energy and where there is a thriving renewables industry in the UK.

Achieving that vision relies on the UK public having both confidence and trust in renewable energy and low carbon technologies and those providing and maintaining it.

As a charitable foundation, it oversees the Microgeneration Certification Scheme, which sets a quality benchmark for technology manufacturers and installers.

In addition to setting and monitoring quality standards, the Charity works to raise public awareness of renewables through education and engagement programmes and by promoting study and funding research into renewable and low carbon technology in order to drive innovation and widespread adoption.


The Charity is the sole member of the Company and is overseen by a board of trustees. The trustees are:

  • Sandra Walmsley (Chair)
  • Karen McArthur (Vice Chair & director)
  • Patricia Chalé
  • Steven Gould (director)
  • Nick Whitaker


Sandra Walmsley (Chair)

Sandra Walmsley spent most of her career in social services and healthcare. She was a Social services Inspector for four years. After taking early retirement from her post as Director of Social Services in Tower Hamlets, she worked as a senior research fellow at the School of Public Policy at Birmingham University teaching MBA students and specialising in consultancy work in the field of change management.

Sandra went on to serve as vice chair of a Hospital Trust, then Chair of an NHS Mental Health Trust and then Chair of the National Standards Committee of DWP.  She studied for her B.Sc (Econ) at LSE, her postgraduate diploma in Social Work at Birmingham University and her MA in Business and Public Sector Strategy at Kingston University.

Sandra has been an advisor to Green Party politicians on economic policy, and contributed to the Marine Policy. She also stood as a parliamentary candidate for the Green Party. She has significant experience as a Trustee of charities across housing, social care, employment and community regeneration.


Karen McArthur (Vice Chair)

Karen McArthur has had strategic roles in Corporate Responsibility/Sustainability for global companies including Vodafone and Thomson Reuters, driving innovation across the environmental agenda to improve performance.

As a founder NED for the Institute for Corporate Responsibility & Sustainability she is committed to promoting excellence within the profession.  She now has a portfolio of roles covering ethics, standards and consumer advocacy and is a NED for a number of social enterprises and organisations advocating for consumer rights.

She was Trustee for 6 years at the Nationwide Charitable Foundation and was responsible for shaping the multi award winning strategy.  She is also the Trustee representative on MCSSCo.


Steven Gould

Steven Gould is an independent consultant on regulation, consumer protection and strategic policy development.

Having led the regulatory function of RICS – the world’s leading built environment professional body – for 14 years, Steven retired from full time employment in 2014. Before joining RICS, he had previously worked for Which?, NHBC and also in government.

He currently holds another non-executive role; on the governing body of the General Chiropractic Council – one of the statutory health regulators.

Steven’s previous non-executive roles include membership of the government’s Better Regulation Commission, Director of Ombudsman Services Ltd, and membership of a number of conduct panels and advisory committees on regulation governance and conduct in the professions


Nick Whitaker

Nick Whitaker is a Fellow of the Institute of Chartered Accountants in England and Wales, with substantial experience in business, covering mergers and acquisitions, company and asset valuations, audit and assurance services, corporate governance, forensic investigations, and expert determinations.

Nick retired on 31 March 2015 from being a partner in BDO LLP (and prior to that, since 1990, a partner in PKF(UK)LLP). As well as acting in an advisory capacity, he has acted as principal, investing in London businesses on behalf of Greater London Enterprise and has first-hand experience of investment processes and management, embracing business strategy and implementation.

He has acted as an expert witness with High Court experience in a variety of commercial disputes and professional negligence cases, in particular relating to corporate finance, due diligence, valuations and audit work. He is a qualified mediator and undertakes expert determinations primarily on behalf of the ICAEW.

Since retiring Nick has taken on a number of Non-Executive Director and Trustee roles, primarily in the regulatory, legal and scientific fields.


Patricia Chalé

Patricia Chalé has over 25 years of experience in senior management and board level director roles in challenging and complex multi-function and multi-operation environments. She has worked extensively in the not-for-profit, public, and private sectors in over 20 countries across North America, Europe, Africa, South and South-East Asia, and the Middle East.

Patricia’s developed expertise spans the entire spectrum of organisation development in diverse roles including Director of Organisational Development, Director of Corporate Services, and Executive Director/CEO. Patricia has also worked extensively in the sphere of diversity, equality, and inclusion, and undertaken high profile published research in this respect. She is skilled in delivering visionary and innovative strategic support, and driving major change initiatives in a range of challenging contexts including new business start-ups, mergers and acquisitions, and turnaround situations.

Patricia has extensive experience of working with Board Chairs and Trustees, ensuring robust governance protocols are in place. She has also successfully managed relations with governments, business leaders, and other major stakeholders in a variety of international contexts.

Patricia is skilled and accredited in a number of organisational development and people management standards, including having been an Assessor of the Investors in People International Standard.

Patricia is passionate about developing and supporting organisations to enable them to excel and has been consistently commended for an ability to advance mission critical efforts in short periods of time.

The MCS Company is the trading arm of the Charity and is responsible for the day to day running of the MCS Scheme.

The new Directors of the Company are now formulating plans to develop the Scheme. They are keenly aware of the need for the Scheme to better protect consumers, further improve quality, and support these vital industries to grow. Further information will be released as it becomes available.

MCS Service Company Directors are:

  • Tim Lunel
  • Catrin Maby
  • Chris Roberts

Tim Lunel

Tim Lunel has been involved in the development and growth of the domestic renewables sector since 2005 when he took over as Chief Executive of the National Energy Foundation (NEF).  With NEF’s remit to support the Trade Associations of the newly emerging sector he has seen the growth and professionalism of the sector over the intervening thirteen years.

Over the 7 years he led NEF the Trade Associations grew in stature to the point where they reached the critical mass to go it alone.  The Solar Trade Association and the Ground Source Heat Pump Association are notable amongst these successes.

He is Managing Director of CoControl Ltd a smart thermostat start-up business focussed on the social housing sector – bringing the power of the collective data of actual house condition data to enable Social Landlords to make strategic asset management decisions.  Having also started up Hook Norton Low Carbon Limited as a community social enterprise from scratch based on capturing the early benefits of the FiTs and RHI regimes, he has first-hand experience of both the challenges and opportunities of leading start-ups.  Having led organisations in the private, public and third sectors as CEO and Director he brings this experience to the role of Chair of the MCSSCo post-Novation.

In addition to his MBA from London Business School he holds a PhD and an MA in Natural Sciences both from Cambridge University.

Catrin Maby

Catrin Maby has worked in sustainable energy since 1984, when she set up an energy advice service for London tenants, and produced handbooks on recycling, draught-proofing and heating advice.  During the 90s she worked with Birmingham City Council to develop energy efficiency aspects of urban renewal programmes, trained over 1,000 people in energy awareness, developed energy awareness materials for use in core skills adult education, and assisted several local authorities in producing their first home energy efficiency strategies.

Catrin established the sustainable energy charity, Severn Wye Energy Agency in 1999, and as CEO built it to a 50 strong organisation, where she led European partnership projects on energy advice, retrofit of social housing, and community-scale delivery of retrofit, as well as the innovative Stroud Target 2050 programme which included one of the 5 UK ‘Pay As You Save’ pilots. Since leaving Severn Wye in 2015 Catrin has worked with diverse partners and funders in the UK and abroad to deliver a range of research and consultancy projects on buildings retrofit, EU energy policy, and energy advisory services.

Catrin has a degree in Engineering Science, and a Master’s degree in Energy Resources Management. She is a Member of the Energy Institute and a Fellow of the RSA, and was awarded an OBE in 2012.

Chris Roberts

Chris has worked in the low carbon & renewables sector following the successful completion of a Master of Science degree in the subjects of renewable energy and low energy architecture in 2001. Upon graduating, Chris joined the Building Research Establishment (BRE) in 2001 where he managed the government’s first multi-technology grant scheme for renewable energy: The Clear Skies programme.

The Clear Skies programme included the approval of products and installation contractors and through the lessons learned MCS was conceived. Chris was a member of the original management team that then developed and launched MCS and he has been heavily involved in MCS ever since as Chair of several technical working groups, and as representative of the Solar Trade Association on the Steering Group.

Chris has also been director of a small MCS certified contractor as well as a senior manager in a large MCS contractor where he managed in excess of 70 staff, so he has a thorough understanding of MCS from all perspectives.

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