TWL-Technologie, headquartered in Freihung (Bavaria), is a medium-sized company in the field of renewable energy technology. For over 20 years, TWL has been developing and producing storage solutions, solar systems, and system components for the efficient use of heat and electricity in buildings and industrial applications.
The product portfolio ranges from standard and special storage tanks to innovative PRISMA® PVT hybrid collectors, which combine electricity and heat generation in a single unit.
TWL supplies installation companies, energy suppliers, and project developers in Germany and abroad and sees itself as a system provider for integrated energy solutions from a single source—from generation to storage.
What are the main areas of activity of the company?
TWL specializes in the development, production, and distribution of thermal and hybrid energy systems.
The company combines decades of experience in storage technology with modern solar technology and offers solutions that intelligently combine electricity and heat generation.
- Storage technology:
TWL develops and manufactures hot water tanks, buffer tanks, and large storage tanks with volumes ranging from a few hundred to 150,000 liters. In addition to a wide range of standard products, the company also manufactures customized special designs for commercial and industrial applications.
- PVT systems:
Another focus is on the co-development and production of PRISMA® PVT hybrid collectors, which generate electricity and heat simultaneously. This technology is primarily used in combination with heat pumps and storage systems and enables highly efficient complete systems for residential buildings, commercial properties, and neighborhood solutions.
What’s the news about new products?
The latest product in the portfolio is the PRISMA® PVT RBX—an innovative hybrid collector we co-developedthat that combines electricity and heat in a single surface.
It has been specially optimized for use with heat pumps and uses an AI-optimized channel structure in the heat exchanger on the back to dissipate the heat generated by the PV module evenly and efficiently.
By dispensing with fans, the system operates completely silently and at the same time enables the regeneration of geothermal sources such as ground probes or ice storage systems. In combination with a heat pump and storage tank, this creates a highly efficient overall system that is suitable for both new and existing buildings.
In addition, the collector can extract thermal energy from the ambient air—even when the sky is cloudy or at night—thus continuously supporting heat pump operation.
What are the ranges of products?
TWL offers a wide range of energy storage and solar technology components for residential, commercial, and industrial applications.
The main areas are:
- Storage technology: Development and manufacture of hot water, buffer, and large storage tanks made of steel with volumes of up to over 150,000 liters, including custom-made products according to customer specifications.
- Solar thermal energy: Distribution of high-performance flat-plate collectors and vacuum tube collectors for solar heat generation and integration into heating or domestic hot water systems.
- Photovoltaics & PVT: Supply of PV modules and PRISMA® PVT hybrid collectors, which generate electricity and heat simultaneously and are suitable for both new buildings and renovations.
TWL covers the key technologies for the generation and storage of renewable energy and supplies specialist companies, wholesalers, and project developers in Germany and abroad.
At what stage is the market where you are currently active?
The market for renewable heat is currently developing very dynamically.
The combination of heat pumps, solar and storage technology in particular is becoming increasingly important, as municipalities and building owners increasingly want and need to rely on fossil-free solutions.
The PVT segment is showing particularly positive development: the technology has now established itself as an integral part of the industry and is being used in more and more projects as a heat source for heat pumps. Interest is coming from both the private and municipal sectors.
At the same time, the economic conditions are changing. Falling heat pump prices are partially offsetting the expected reduction in government subsidies, making PVT systems profitable in the long term even without high subsidies.
Overall, the market is in a phase of technological maturity and strong growth, in which efficient, tried-and-tested technologies such as storage, solar thermal, and PVT systems are becoming increasingly prevalent.
What can you tell us about market trends?
Developments in the heating market show a clear technological shift: away from purely electric or fossil fuel systems toward combined solutions that intelligently combine electricity, heat, and environmental energy.
PVT systems are playing an increasingly important role in this development. They enable solar energy to be used all year round and are increasingly seen as an alternative to traditional brine heat pumps with geothermal probes – offering comparable efficiency but lower installation costs.
Interest in bivalent systems, in which PVT fields regenerate geothermal sources such as geothermal probes or ice storage systems, is also growing in the multi-family and neighborhood sectors. This keeps source temperatures stable in the long term and annual performance factors consistently high.
In addition, technological advances in heat pumps, PV, and storage technology are leading to greater system integration and simplified implementation for specialist companies.
The trend is clearly moving toward practical, economical complete solutions that enable a continuous supply of renewable energy.
What are the most innovative products marketed?
Our most innovative product is also our latest product, as already answered in question 3: the PRISMA® PVT RBX. This is a hybrid collector that generates electricity and heat at the same time.
It uses AI-optimized channel geometry in the heat exchanger to evenly dissipate the heat generated and support the operation of the heat pump – without a fan and therefore silently.
Particularly noteworthy is its ability to extract heat from the ambient air, which means that the collector can supply usable energy even when it is cloudy or at night.
Another focus is on the further development of storage technology.
TWL has recently started producing large storage tanks with a volume of up to 150,000 liters.
What estimations do you have for 2024?
We expect demand for combined power and heat generation solutions to remain strong until the end of 2025, particularly in connection with heat pump systems. The market is clearly moving toward integrated, efficient components that are gradually replacing fossil fuel systems.
An important milestone for us is the delivery approval of the PRISMA® PVT RBX from December 2025. After an intensive development phase and successful testing, series delivery of our new hybrid collector will begin – a key step in the further market introduction of PVT technology.
In November, we will be exhibiting at HeatExpo in Dortmund (Hall 4, Booth F14), where we will present the PVT heat pump combination in a monovalent setup. At the same time, preparations are already underway for the first major projects for 2026, including supplying a newly built school with PRISMA® PVT RBX collectors.
We expect PVT systems to establish themselves as the standard technology for renewable heat in the coming years, with heat pump prices continuing to fall and interest in combined solar and storage technology growing.
Photo copyright: TWL-Technologie GmbH
