Not an anonymized client project and not a theoretical concept: the HSG Innovation HUB in Frickenhausen is our own operational site. Since 2012, we have continued to develop the building, power generation, storage, heat, charging infrastructure and energy management as one economically viable system.
Photovoltaics
77 kWp
Annual Generation
approx. 70,000 kWh
Battery Storage
270 kWh
DC Fast Charger
150 kW
Status and reference basis: 77 kWp, 270 kWh and 150 kW are the stated equipment figures for the site. Approximately 70,000 kWh is the stated annual generation. The subsequent energy-balance allocation is calculated; it does not replace a measurement log for individual demand areas.
When Frank Hummel planned the new company site in Frickenhausen in 2012, he decided against gas, central heat distribution and isolated technical solutions. Instead, infrared heating, photovoltaics, charging infrastructure and KNX building automation were designed as one connected system from the outset. The PV system now has a capacity of 77 kWp.
Decision: The historical site decision was to consider the trades as one system from the outset. This page describes that decision at HSG's own site; it is neither a client project nor a general savings or autonomy promise.
For clarity, the energy flows are deliberately separated: heating and administration, general building operation and mobility are distinct areas of demand. This separation shows how approximately 70,000 kWh of PV generation, 270 kWh of storage and the AC/DC charging infrastructure work together as one system.
HSG and HUMMEL energize operate at the same site, while remaining legally and entrepreneurially separate. Ownership, operations and service responsibilities are clearly assigned.
HSG owns the Innovation HUB. HUMMEL energize is a legally and entrepreneurially independent specialist partner at the site. Sharing a site does not imply a shared company or ownership role.
Owner · Innovation HUB
HSG owns the building, the photovoltaic system, the 270 kWh storage system and the AC/DC charging infrastructure. The site serves as an Innovation HUB, demonstration platform and basis for entrepreneurial decisions.
Role reference: ownership and the Innovation HUB function sit with HSG.
Independent Tenant · Operations & Service
HUMMEL energize is a legally and entrepreneurially independent company at the site. It installed and commissioned the storage system and operates and services the power-generation system and the entire charging infrastructure, including public charging and the charging-card service.
Role reference: the installation, commissioning, operations and service tasks stated here are assigned to HUMMEL energize.
One Site · Three Perspectives
A real demonstration and development site.
An all-electric system spanning power, heat, mobility and control.
Experience translated into decisions on economics and implementation.
The site connects four technical layers into one integrated energy system. The decisive factor is not any individual component, but the economically coordinated system logic.
Vitramo ceiling infrared panels for the offices and dark radiators for the warehouse. The heating system investment was EUR 28,000 for 920 m²; no heating-system maintenance costs have been incurred since commissioning.
The rooftop system generates around 70,000 kWh per year. On a calculated basis, around 13,000 kWh are used for heating and administration, 25,000 kWh for general building operation and 32,000 kWh for mobility.
The DC fast charger complements the AC charging points at the site. HSG owns the charging infrastructure; HUMMEL energize operates and services it, including public charging and the charging-card service.
The storage system shifts energy into periods of demand, buffers charging power and significantly limits additional grid demand and peaks. HUMMEL energize installed and commissioned it.
The KNX system connects the building-services components and controls them according to demand. Presence detection, heating, ventilation, lighting and other loads do not operate in isolation, but in response to actual use.
Energy data are recorded continuously. Generation, storage, building loads and charging power can therefore be assessed and developed together, both technically and economically.
Annual PV generation is no longer presented as an ambiguous total-consumption figure. Instead, the balance clearly shows how the site's approximately 70,000 kWh are allocated: heating and administration, general building operation and mobility. Storage and energy management shift energy between generation and demand.
Economic context: The energy balance allocates the stated annual PV generation to demand areas on a calculated basis. It reports no measured saving, guaranteed grid autonomy or return. TCO, IRR and DSCR may be relevant in a site-specific assessment; this use case does not derive results for them.
Annual PV Generation
approx. 70,000 kWh
77 kWp of photovoltaics at HSG's own site
Heating & Administration
approx. 13,000 kWh
18,6 %
Infrared heating and administration energy demand.
General Building Use
approx. 25,000 kWh
35,7 %
General loads across the office and commercial site.
Mobility
approx. 32,000 kWh
45,7 %
Charging energy for company and public mobility – equivalent to approximately 120,000 electric kilometres.
The percentages represent the calculated allocation of annual PV generation. They do not claim complete grid autonomy; seasonal generation and demand are balanced over time through storage, energy management and grid supply.
The installed 270 kWh battery storage system links PV generation, building loads and the 150 kW DC fast charger over time. It supplies energy when needed, buffers charging power and significantly limits additional grid demand and peaks.
HUMMEL energize installed and commissioned the storage system. As a legally and entrepreneurially independent company, HUMMEL energize also operates and services the power-generation system and the entire charging infrastructure.
Effect context: The stated storage functions explain the system logic. This page does not quantify avoided grid capacity, peak demand or cost savings.
Flywheel Principle
Storage Capacity
270 kWh
Storage Power
130 kW
DC Fast Charger
150 kW
Additional Grid Demand
Significantly Limited
The site and its building technology have repeatedly been covered by external organizations. The distinction matters: external documentation primarily covers the building and heating performance, while current energy and charging parameters are based on the site's own operating data.
Reference context: The listed external publications document building and heating experience. They are not technical acceptance and do not independently confirm the current energy, storage or charging parameters.
Official reference in the association brochure: a fully electric office and commercial building in Frickenhausen.
Issue 9/10.2025: documented operating experience with infrared heating in the commercial building.
Trade-publication coverage of the energy concept with KNX automation, photovoltaics and e-mobility.
Time context: The timeline places historical development steps and the stated current expansion in context. It does not replace a continuous performance, cost or economic measurement series.
A 920 m² office and warehouse site with infrared heating, photovoltaics, AC charging points and KNX building automation is commissioned as one integrated system.
Building & Automation publishes the energy and automation concept. The experience is transferred to additional commercial properties.
Following the sale of the operating business to ZÜBLIN, HSG continues to develop the site as an independent entrepreneurial platform and Innovation HUB.
The 150 kW DC fast charger expands the existing AC charging infrastructure and enables public charging at the site.
HUMMEL energize installs and commissions the storage system. Storage and energy management shift energy, buffer charging power and limit additional grid demand and peaks.
The site demonstrates how buildings, power generation, heat, storage and mobility can be developed step by step into an economically viable overall system. Not every technical solution transfers one-to-one, but the decision logic does.
The Innovation HUB makes the system tangible at a real operating site. REVOLUTION E transfers the all-electric logic to other sites. SPARRING turns the experience into robust decision support for executive teams, CFOs, boards and investors.
In a sparring session, we assess objectives, load profiles, investment requirements and economic priorities. The REVOLUTION E Site Assessment then connects actual site data and scenarios into a robust basis for decision-making.
Or explore the REVOLUTION E Site Assessment