Nanolope Raises €800K to Turn Buildings Into Thermal Batteries

Nanolope wants the surfaces already surrounding people inside a building to do more than divide rooms. The Berlin deep-tech company has developed retrofit panels that absorb excess heat as indoor temperatures rise and release it again when temperatures fall, effectively turning ceilings, walls and floors into passive thermal storage. Its target is the enormous stock of existing buildings where full energy renovations can be expensive, disruptive or economically difficult.

The company has closed a €800,000 pre-seed round, backed by IBB Ventures through its B# fund, alongside business angels and specialists from the energy, real-estate and materials sectors. Nanolope will use the capital to scale production, install its first pilot projects and expand the team as it moves from material development toward commercial building deployments.

Nanolope was founded by Dr. Felix Marske, Eric Matthes and Dominik L. Schreiber. Dr. Felix Marske, a chemist and inventor of the underlying material, leads the company as CEO. Eric Matthes brings renewable-energy and building-services engineering experience as CTO, while Dominik Schreiber contributes financing, market strategy and construction-sector experience as CFO.

At the center of Nanolope’s technology is a shape-stabilized phase-change material. During warmer periods, material inside the panel changes phase and absorbs thermal energy without allowing the panel itself to lose its shape. As temperatures drop, it solidifies and releases that stored heat back into the room. Nanolope says its panels can store up to 24 times more heat than conventional building boards, while remaining drillable and suitable for retrofit installation.

That architecture matters because the heating transition cannot depend entirely on demolishing or deeply renovating existing properties. Nanolope is designing its system so offices, apartments, hotels and commercial buildings can add thermal storage with limited disruption, while future configurations could also work alongside photovoltaics and heat pumps.