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German renewable energy project developer Saxovent Renewables GmbH & Co. KG and HIH Real Estate GmbH have agreed to cooperate on expanding the use of renewable energy across property portfolios. The partners will jointly analyse, develop and implement sustainable energy solutions in suitable existing buildings.
Roof space and existing infrastructure in focus
Announced in Berlin on 11 September 2026, the cooperation aims to identify untapped potential in existing buildings and develop energy solutions that are economically sustainable over the long term. The partners will look in particular at roof space and existing infrastructure to assess how renewable generation can best be integrated into current real estate strategies.
Jan Steggewentz, Branch Manager and Director of PV Project Development at Saxovent Renewables, said making existing buildings part of the energy transition requires solutions that are practical and economically viable. According to Steggewentz, together with HIH the companies are laying the groundwork to identify the potential of usable space systematically and implement sustainable energy concepts efficiently. He stressed that existing buildings hold great potential for combining renewable energy with existing structures, delivering economic benefits for owners, tenants and system operators while also improving sustainability.
Storage, charging infrastructure and heat pumps alongside PV
The partners take a holistic view of each property’s energy needs, assessing other energy supply and optimisation options alongside conventional photovoltaic solutions according to site-specific conditions. The aim is to make the best use of available space and make buildings environmentally and economically sustainable over the long term.
Fynn Rotzoll, PV Rooftop Project Lead at HIH Invest Real Estate, said Saxovent adds another strong partner to their platform, with three joint projects moving into implementation this year and further projects in development. Rotzoll said they take a modular approach to energy and, depending on the property, integrate battery storage, charging infrastructure or heat pumps in addition to PV.
Rotzoll said they believe renewable energy will become an integral part of real estate, driven by sustainability requirements, investor and tenant expectations and regulatory conditions. In his view, this approach offers funds the opportunity to generate additional income and increase the long-term value of properties, while tenants benefit from affordable green electricity produced on site. Rotzoll added that strong partnerships, from developers such as Saxovent to general contractors and technical advisers, are essential for this to work.
Plans to expand to multiple locations
As requirements around energy efficiency, ESG criteria and security of supply grow, the smart use of existing infrastructure becomes even more important. The partnership between Saxovent Renewables and HIH Real Estate provides a framework for this and is set to be extended to multiple locations going forward.
About Saxovent Renewables and HIH Invest
Berlin-based Saxovent Renewables is an independent renewable energy project developer with a regional presence across Germany. The company covers the entire value chain, from site acquisition and permitting to the construction and operation of projects. In photovoltaics, it develops, finances and operates distributed generation systems for commercial properties and also offers turnkey PV solutions through an operator model, in which owners of large roof areas earn additional income without investment or operating risk while electricity consumers are supplied directly on site with affordable power generated on their own roofs.
HIH Invest Real Estate is an investment manager active in real estate and infrastructure in Germany and Europe. Serving around 280 institutional clients, the company has eight locations in Europe and manages assets with a total value of around EUR 26 billion.
Featured image: Jan Steggewentz © Saxovent Renewables GmbH & Co. KG
Sources: Saxovent Renewables GmbH & Co. KG and HIH Real Estate GmbH press release, “Saxovent Renewables and HIH Real Estate Combine Expertise to Develop Sustainable Energy Solutions for Real Estate Portfolios”, Berlin, 11 September 2026 (via Krampitz Communications GmbH).
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