Berlin Startup Vrey Secures €3.3M to Revolutionize Solar Energy Sharing in German Real Estate
A Berlin-based energy tech startup is making waves in Germany’s real estate sector by unlocking a scalable business model for property owners: community solar energy sharing. Vrey, founded in 2024 by Julius Pahmeier and Cedric Jaeger, has just secured a €3.3 million seed round from Rubio Impact Ventures, the High-Tech Gründerfonds (HTGF), and Kopa Ventures.
The funding is set to accelerate the adoption of Gemeinschaftliche Gebäudeversorgung (GGV), a model that lets property owners sell solar power directly to tenants—without the regulatory burden of becoming full-fledged energy providers.
Unlike traditional tenant electricity models (Mieterstrom), where landlords assume the role of energy suppliers with all its complexities, GGV simplifies the process. Property owners install solar panels on multi-family building roofs and sell the generated electricity directly to tenants, while traditional utilities cover the remainder of the energy needs. This partial supply approach reduces legal and administrative hurdles, offering landlords a way to generate additional revenue while meeting ESG (Environmental, Social, Governance) criteria.
The business case for GGV becomes compelling at around 15 kWp of installed solar capacity, ideally paired with a small storage unit and serving at least five residential units. Julius Pahmeier, co-founder of Vrey, notes that projects of this scale can achieve double-digit annual returns and amortize within a decade. For example, a 30 kWp system on an eight-unit building can generate an extra €5,500 annually for the owner. Tenants, meanwhile, can save between €120 and €180 per year on their energy bills, depending on consumption and storage capacity.
Germany’s untapped potential for GGV is vast: over 20 million residential units in multi-family buildings, according to the Cologne Institute for Economic Research (IW). Yet, only a fraction of these properties currently utilize economically viable solar solutions. Vrey’s model aims to change that by providing end-to-end services, from installation to billing, through its proprietary software platform. Property owners need only spend about five minutes a month managing the process, with automated invoicing and direct payouts to their accounts.
Despite the clear benefits, the market’s growth hinges on regulatory clarity and industry adaptation. The German government has been pushing for Energiesharing, a broader concept that could allow solar energy to be shared beyond a single building’s roof—extending to neighboring properties or even distant locations. Vrey’s software is already equipped to handle this expansion, provided participants use its metering system.
However, challenges persist. Germany’s slow rollout of smart meters and stringent technical requirements have delayed progress, leaving many utilities unable to integrate these new models efficiently. Cedric Jaeger, another co-founder, points out that while Germany’s regulatory framework is ahead of the curve, the lack of digital standardization and slow infrastructure adoption have created bottlenecks.
Looking ahead, Vrey has ambitious plans: by 2030, the company aims to enable half a million households across Germany and Europe to participate in the energy transition. The immediate focus is on solidifying its position in the German market over the next 18–24 months, before expanding into Europe’s more integrated regulatory environments.
The startup is already engaging with institutions like the German Energy Agency (dena) and the Federal Ministry for Economic Affairs and Climate Action to shape future market rules and grid integration strategies.
With funding secured and a clear path to scalability, Vrey is positioning itself at the forefront of Germany’s shift toward decentralized, community-driven energy solutions—one rooftop at a time.
