Eternal Sun, developer of solar simulators for photovoltaic testing, has announced that Bolster Investment Partners has acquired an 80% majority stake in the company.
The strategic partnership is set to accelerate Eternal Sun’s international expansion, product development, and professionalization. This milestone follows sustained growth and innovation in solar testing technology, including next-gen tandem and perovskite applications. Bolster brings not just capital, but also strategic support to realize Eternal Sun’s long-term ambitions in a rapidly evolving solar market.
Bolster Investment Partners has acquired the stake of Vermec and ABN AMRO Sustainable Impact Fund, who invested in the start and scale-up phases of Eternal Sun and have grown the company to the mid-size market segment. Bolster’s focus is on companies that have a leadership position in niche markets, a perfect match to Eternal Sun and its team.
