The Core Team | The Sun Exchange

The Core Team

Abraham Cambridge, Founder CEO

Abraham Cambridge

Founder CEO

In 2008 I completed an MSc in the Science of Climate Change at the University of East Anglia, UK. It became to clear to me that solar energy is a crucial part of the ‘save the world’ tool-kit. Since then I have established several businesses that use solar energy as a means for creating positive changes in society. In 2010 I pioneered utility-scale solar in Britain and in 2012 a business I co-founded, The Renewable Energy Co-operative, was nominated 'International Co-operative of The Year' in the United Nations Year of Co-operatives. In 2014 my wife and I moved to South Africa to identify opportunities in the emerging African solar energy industry, I appreciate the sunshine!

Anthony Stonefield

Head of Venture Development

A technology entrepreneur and consultant with 24 years of building disruptive ventures and business divisions, Stonefield designed, productized and deployed applications for Mobile/Telecoms, FinTech, Renewable  Energy, Digital Media & Marketing, BioTech, AgriTech and Commodities. Listed as “one of the top 50 mobile content executives” by Mobile Entertainment Magazine, between 1997 and 2005 he spearheaded the multi-billion dollar downloadable song and ringtone industries; developed a solution for projecting media between 3G phones in 2009; and has recently been co-founding or advising a string of innovation companies in Africa, the UK and USA.

Larry Temlock

Larry Temlock

Co-founder CFO

The Sun Exchange is a company leading the development of new areas in project finance.  Not merely another crowdfunding platform, it intelligently mixes blockchain technology, P2P financing, and IoT to provide solar energy projects with solutions benefitting from lower transaction expenses, speedy and transparent payments, real-time operating and financial disclosure, and cryptographic transactional verification without third party financial institutions. The company is facilitating the construction of environmentally sound, socially responsible projects that might otherwise go unfunded by traditional financial institutions and development agencies.

I have MSc and BA degrees in Financial Engineering and Political Science from Columbia University, and most recently served as Managing Director of Debt Capital Markets origination at Daiwa Capital Markets in Hong Kong, where I worked on a variety of traditional and green financings in the Asia Pacific region. I also held similar debt capital markets and syndicate positions at UBS, JPMorgan, Merrill Lynch and ANZ.  I bring to The Sun Exchange corporate finance expertise in emerging and developed economies, and a passion to provide sustainable financial solutions to worthy causes.

Morwesi Ramonyai, CCO

Morwesi Ramonyai


I’m a post graduate of Wits University and completed an Executive MBA with UCT GSB. I was selected as a Mandela Washington Fellow in 2016 and served a residency at Rutgers University to study Supply Chain Sustainability. I’m a recipient of a US African Development Foundation award for developing innovative finance solutions that allows rural women to participate in energy utility ownership.

As an impact entrepreneur and developer of renewable energy solutions, I am passionate about working with rural communities that don’t have access to electricity, especially low income areas that would otherwise never experience reliable energy. For these projects I have rolled out solar PV systems, solar street lights, solar home systems and solar powered containerized solutions. I am a registered trader of renewable energy certificates. The Sun Exchange is the perfect place to bring together my life’s work!

Lisa Lyhne

Lisa Lyhne


I am a business and tech graduate of UCT. I have worked in technology for nearly thirty years, both in South Africa and Europe. I have co-founded three tech services business. I work closely with business innovators to convert ideas into durable software.

I have a great personal interest in sustainability, which includes food supply as well as sustainable energy. It was with great delight I took on the role of CTO to the Sun Exchange. Not only does this role fit me professionally as it makes use of my technical expertise, but it fits my value system as well.