Koolen Industries invests in the energy start-up Kraftblock

Cologne – Luther Rechtsanwaltsgesellschaft mbH has advised the Dutch group Koolen Industries on its entry into the energy start-up Kraftblock in a Series A financing round. The Saarbrücken-based start-up will be supported with a mid single-digit million amount. Kraftblock develops modular expandable thermal energy storage systems on a granular basis, through which energy can be stored in the form of heat.


The investment sum will mainly be spent by Kraftblock on new hires. The Dutch entrepreneur Kees Koolen, former CEO and co-founder of the travel portal Booking and investor in GetyourGuide, Uber and Hyperloop, is the second famous investor to invest in Kraftblock after Frank Thelen.

About Koolen Industries:

Koolen Industries is a group that offers consumers and industry complete integrated solutions for clean energy. Their portfolio includes companies in the fields of solar energy, lithium batteries, power-to-gas solutions and charging infrastructure. With their investments they want to make it possible for everyone to contribute to and participate in the energy turnaround. By generating clean energy from wind and sun and developing new storage and transport solutions to supply this energy, they offer autonomous solutions that are independent of the electricity grid.

On behalf of Koolen Industries:

Luther M&A/Venture Capital: Philipp Dietz, LL.M. (Partner), Fabian Mimberg, LL.M. (Senior Associate), Falco Rohrberg, LL.M. (Associate)

Luther IP/IT: Dr Detlef Mäder (Partner), Dr Jennifer Velz (Associate)