e.systeme21
e.systeme21 GmbH
Ulm, Baden-Württemberg, Germany
About
Founded in 2013, e.systeme21 is a private headquartered in Ulm, Germany with approximately 50-200 employees specializing in Solar, Energy Storage, Hydrogen.
e.systeme21 GmbH is an innovative, family-led solar installation company based in Ulm, Germany, founded in 2013 by Norbert Unterharnscheidt. The firm specializes in the planning and installation of photovoltaic systems for residential and commercial buildings. Core competencies include PV design and installation, battery storage systems, heat pump integration, heating system optimization, electric vehicle charging infrastructure, and intelligent energy management. The company operates its own facility as a pilot project: an energy-autonomous, CO2-free building powered by rooftop and façade-mounted solar arrays, lithium-ion battery storage, and a hydrogen electrolyzer-fuel cell system for seasonal energy storage. Key projects include large-scale commercial installations (e.g., Ladenburger factory, printing facilities), rental housing with tenant electricity models (Lettenwald project in Ulm-Böfingen), and numerous residential installations. The firm emphasizes comprehensive energy solutions integrating power generation, consumption, heating, cooling, and mobility. It holds Fronius System Partner certification, employs TÜV-certified PV inspectors, and is registered with regional distribution system operators. Awarded the 2024 Environmental Prize for Companies Baden-Württemberg in the Crafts category, the company is active in sustainability initiatives including the WIN-Charta and Charter of Diversity.
Headquarters
Ulm, Germany
Founded
2013
Employees
50-200
Company Type
Private
Business Models
Value Chain
Service Regions
Ulm and surrounding areas, Baden-Württemberg, Bavaria
Industry Memberships
BSW (Bundesverband Solarwirtschaft - German Solar Industry Association), WIN-Charta (Sustainability Initiative, Baden-Württemberg), Donautal Connect (Regional Business Initiative), Unternehmensnetzwerk Klimaschutz (Business Network for Climate Protection)
Products
Photovoltaic Systems
Battery Storage Systems
Heat Pump Integration
Hydrogen Electrolysis and Fuel Cell Systems
Electric Vehicle Charging Infrastructure
Energy Management Systems
Projects
e.systeme21 Headquarters
Ladenburger PV Facility
Druckhaus Ulm PV Installation
Lettenwald Residential Project
Certifications & Awards
Certifications
Fronius System Partner
TÜV-Certified PV Inspector
Registered Electrical Installation Company
WIN-Charta Member
Charter of Diversity Signatory
Awards
Environmental Prize for Companies Baden-Württemberg