Startup Heizma takes over Soly customers following insolvency in Austria
Austrian energy company Heizma is integrating several hundred photovoltaic systems as well as ongoing projects from insolvent Dutch provider Soly into its platform. The acquisition includes full support for Austrian customers and strengthens Heizma’s position in the field of decentralized energy solutions. The Vienna-based scale-up is positioning itself as a stability anchor in a market environment recently shaken by corporate collapses.
Soly had established itself in recent years as a pan-European photovoltaic provider and expanded from its Dutch home market into several countries. In January 2024, the company secured a financing round of 30 million euros, led by ArcTern Ventures and Fifth Wall, with participation from existing investors such as Shell Ventures and Dutch pension fund ABP.
The funds were intended to drive expansion into new markets, including Austria, where Soly quickly became one of the larger providers. However, in late November 2025, several key entities of the Soly Group in the Netherlands filed for insolvency, including Soly Holding B.V. In early December, bankruptcy proceedings followed for the Austrian subsidiary. The company attributed the failure to a challenging European market environment and a failed financing round.
Structured settlement for existing customers
Heizma now serves as the central point of contact for service, inspections, warranty matters, and completion of outstanding projects. The company relies on Optima, an AI-based energy management system developed in Austria. The software enables improved integration with Austrian energy communities and optimizes the control of photovoltaic systems, battery storage, and consumers. Technical integration is intended to ensure operational continuity and digital management of systems for affected households.
For photovoltaic projects not yet realized, Heizma offers structured project takeover. The process includes technical reassessments, transparent recalculations, and implementation with fixed timelines. The company aims to complete projects quickly and provide planning certainty. Co-founder Alexander Valtingojer states that the energy transition requires robust structures, which Heizma now provides for affected households.
In the bankruptcy proceedings of Soly Austria Operations GmbH, claims can be filed according to KSV1870 until January 26, 2026. Heizma has established a central service desk for Soly customers at soly@heizma.at. The acquisition takes place at a time when the Austrian photovoltaic market is facing consolidation pressure despite political support programs.
