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Case Study

An integrated all-in-one energy solution

Setting the scene

Zimmermann wanted a way to use its own on-site generated electricity to meet all the needs of its headquarters in Baden-Württemberg, Germany – including its electric vehicles. Finding an efficient economic and ‘green’ solution was a top priority for them. 

After carrying out a full assessment, BayWa r.e. planned and implemented an intelligent and sustainable energy solution that would harness and optimise the energy generated by the site’s two existing PV installations. 

Meeting the challenge

The company's headquarters features building-integrated photovoltaics, a charging infrastructure for eMobility, a roof-top PV installation and a battery storage system. Zimmermann also set up an exhibition show park for PV substructures. 

Thanks to the smart energy solution, the customer is empowered to use the renewable energy generated on site to deliver a sustainable energy supply for the site and for all its electric vehicles.

Eight AC charging points with a total charging capacity of 154 kW were created for powering up electric vehicles. In addition, rapid charging by a DC hypercharger with an output of up to 150 kW is possible. The flexible design means there is potential for future expansion of the charging infrastructure.

The renewable electricity generated on site is more than sufficient for Zimmermann’s needs, and its battery storage system is therefore used, among other things, to optimise self-consumption. Any surpluses can be fed into the grid.

Due to the limited capacity of the grid connection, the battery storage supports the charging of the electric vehicles by providing a high charging capacity just when it’s needed.

An intelligent energy management system (EMS) is connected to a complex measuring system in order to record all energy flows at the site. It regulates the interaction of the components and ensures that the energy solution operates in accordance with the grid.

The result

The Zimmermann project provides an excellent example of how smart energy management and battery storage systems can play a central role for corporations delivering electricity self-sufficiency and a reduced carbon footprint, as well as demonstrating the growth potential in the market for charging infrastructures. 

This project with a battery storage system and an innovatively used EMS connecting to different charging solutions will provide excellent data going forward.

Zimmermann can now meet its on-site electricity demand on a cost-effective basis, benefiting from a significant reduction in its overall energy costs.

The solution created and delivered by BayWa r.e. underpins Zimmermann’s commitment to sustainability and quality, and marks another milestone in the company’s zero carbon journey.

We have enjoyed a highly valuable partnership with BayWa r.e. for many years. The team there supports us in achieving our sustainability goals.

Robert Zimmermann
CEO Zimmermann PV-Stahlbau GmbH & Co. KG.

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