
From an electrical master craftsman's business to a system house with over 100 employees, from a successful exit to STRABAG/ZÜBLIN to the Innovation HUB - experience that goes into every project and consultation.
30+
Years of Experience
since 1993
1.000+
Projects Realized
Consulting, planning, implementation & service
100+
Employees Managed
HUMMEL Systemhaus + ZÜBLIN
36
M kWh Electricity / Year
Energy for ~10,000 households
Over three decades of expertise built in all areas of modern building and energy technology.
From 10 kWp in-roof systems to large-scale installations on public buildings, commercial and industrial.
Battery storage systems for self-consumption optimization, peak-shaving and emergency power supply.
AC and DC charging stations with OCPP backend, load management and billing systems.
Complete electrical planning and installation for new buildings, renovations and extensions.
Building automation with KNX, intelligent controls, lighting scenarios and comfort systems.
Fire alarm systems, access control, video surveillance and intrusion detection systems.
Professional lighting design for offices, churches, events and architecturally demanding projects.
Monitoring, reporting, tariff optimization and intelligent load control for minimal energy costs.
Active networks with Alcatel-Lucent, structured cabling, data and communication solutions with over 1,000 interfaces.
From major public projects to leading construction groups to private smart building villas - the range of our realized projects speaks for itself.
District offices, school centers, universities
STRABAG, ZÜBLIN, Ed. Züblin AG
Fohhn Audio, KACO new energy, Hahn+Kolb, Stahlbau Nägele, AVATEC, elero
Alcatel-Lucent, KACO new energy, Hahn+Kolb - active networks with 1,000+ interfaces
Volksbank, Kreissparkasse Esslingen
HfWU Nürtingen, Gewerbliche Schule Backnang
Körperwerk Therapy Center, allstar Fencing Center
Rudolph Airtransfracht, Stuttgart Airport
Smart buildings, villas, apartment buildings, Stuttgarter Tor
Württemberg Haus, St. Petrus und Paulus Church
Start as an electrical engineering master craftsman's business in Frickenhausen
Building the ICT division with Alcatel-Lucent. Active networks with over 1,000 interfaces for data and communication - development into a full-service provider
Expansion to over 100 employees, focus on building technology, smart building and security
Entry into PV, storage and charging infrastructure - major projects for municipalities and corporations
Market launch of the REVOLUTION E brand with self-developed products for building automation and charging infrastructure for e-mobility
Strategic sale of HUMMEL Systemhaus (asset deal) to Ed. Züblin AG / STRABAG SE
Continuation as CEO and division head within the corporate structure
Personal exit from the corporation. Full focus on HSG as an entrepreneurial platform
HUMMEL Service Group with Innovation HUB, Frank-Hummel-Consulting, REVOLUTION E and 150 kW CCS fast charger
A selection from over 1,000 realized projects - from corporate new builds to high-rise projects with sophisticated building technology.

Corporation · PV + Storage + Charging Infrastructure
Sustainable photovoltaic system with energy storage and efficient charging infrastructure for the six-story corporate building at Albstadtweg 10 in Stuttgart.

Residential & Commercial · Electrical Engineering
Complete electrical planning and installation for the striking high-rise project 'Stuttgarter Tor' in Reutlingen - one of the tallest buildings in the region with sophisticated building technology.

Corporation · Building Technology
Multifunctional building envelope for the new building at Ed. Züblin AG's Stuttgart headquarters - up to 250 additional workplaces with state-of-the-art electrical engineering.

Finance · Electrical Engineering
New headquarters of Kreissparkasse Esslingen-Nürtingen on Bahnhofstraße Esslingen - a future-oriented project with 400 employees, combining tradition and modernity as a showcase to the city.

Industry · Electrical Planning
Complete electrical planning for the new building of the loudspeaker manufacturer - research, development, assembly, logistics and sales under one roof.

Industry · Electrical Planning
Complete electrical installation for the new building of drive technology specialist elero in Schlierbach - production, administration and development with state-of-the-art building technology.

Private/Luxury · Smart Building
Congenial collaboration with the renowned architecture firm Alexander Brenner - complete smart building integration and building services at the highest level.
The listed projects were realized as part of HUMMEL Systemhaus, which Frank Hummel founded in 1993, scaled to over 100 employees and strategically sold to a leading European construction group (asset deal) in 2020. After three more years as CEO and division head in the corporation (exit 12/2023), all project experience and technical know-how now flow into the HSG HUMMEL Service Group.
View all references on hummel-systemhaus.de
Whether strategic consulting, all-electric solution or Innovation HUB partnership - this experience works for you.