Malta Continues 2023 Expansion with Addition of Renewable Energy and Storage Solutions Veteran Ralf Wiesenberg as EVP of Global Business Development

CAMBRIDGE, Mass. – May 4, 2023 – Malta Inc., a pioneer in long-duration energy storage (LDES) that offers utility-scale clean energy replacements for coal, oil, and gas power plants, today announced the addition of Ralf Wiesenberg as Executive Vice President of Global Business Development.

Wiesenberg joins Malta as the storage industry leader advances its global presence with active projects in North America and Europe. In this new position, Wiesenberg will be responsible for formulating and implementing worldwide commercial strategies.

Wiesenberg brings to Malta 28 years of experience in renewable energy and energy storage solutions. Most recently, he served as Vice President of Business Development for Swedish long duration energy storage manufacturer Azelio.

“Ralf’s extensive global experience makes him a perfect fit for our growing team,” said Ramya Swaminathan, Malta CEO. “His drive and business acumen will supercharge Malta’s mission to deploy our utility-scale storage solution on grids across the world.”

Prior to Azelio, Wiesenberg headed the Renewable Energy division at AFRY, a European leader in engineering, design, and advisory services. He also served as Managing Director at Sun to Market Solutions, Business Development Manager – Energy at Grupo Cobra, and in roles with PricewaterhouseCoopers Advisory, Arthur D. Little, and German utility swb AG.

Over the course of three decades, Ralf has gained extensive experience managing energy-related projects across the globe, with a track record of success in Africa, Asia, Australia, Europe, Latin America, the United States, and the Middle East. He has worked with a diverse range of private and public institutions, bringing his expertise to bear on a variety of complex projects. Notably, Ralf had project assignments with numerous multilateral organizations, including the Asian Development Bank, Inter-American Development Bank, World Bank, European Bank for Reconstruction and Development, and the United Nations Development Business.

Wiesenberg holds a diploma in energy and process engineering from the Technical University of Berlin, where he also obtained his Ph.D. in Energy System Engineering. He is based in Madrid, Spain.


About Malta Inc.

Malta, Inc. has developed a 100 megawatt (MW) Clean Power Plant, a one-for-one replacement for today’s fossil fuel-fired plants that delivers affordable, reliable, on-demand clean energy 24/7.

Malta’s innovative technology stores electricity as thermal energy from eight hours to eight days or longer, later returning it to the grid to meet hourly, daily, and weekly needs. The Malta system also provides clean heat for industrial and district heating applications. Visit:


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Malta Inc.
Steven C. Sullivan