Turnkey installation of battery storage systems and grid connection
Turnkey battery storage (BESS): we plan, deliver, install and commission your storage system, matched to your energy systems.
Our turnkey battery storage solutions are matched to your existing and future energy systems. This creates the basis for high efficiency and security of supply. We take on all steps: from individual planning through procurement and delivery and professional installation to commissioning.
A battery storage system balances generation and consumption over time and thereby stabilises the grid. Large-scale storage systems generally consist of cabinets or containers with battery modules, set up together with transformers, inverters and switching and protection equipment. The containers are mostly air-conditioned, not walk-in and equipped with a technical fire protection system; their size goes up to the dimensions of a sea container. Typical locations are the vicinity of substations and grid nodes, areas next to commercial buildings, and large photovoltaic and wind power plants. The classification of a storage container under building law depends on the respective provincial law and the characteristics of the specific plant; being walk-in is not decisive on its own.
Depending on the arrangement relative to the grid, a distinction is made between stand-alone storage with a direct grid connection, co-location storage with a shared grid connection as part of a generation plant, and behind-the-meter storage at existing consumption facilities. This classification determines the permitting route, metering concept and design: which provisions of electricity, trade and building law apply depends on the project, the operating model and the respective provincial law; whether a stand-alone storage system requires a permit under electricity law depends on the relevant provincial law and the characteristics of the project. For stand-alone storage, charging and discharging are measured separately, and for hybrid plants generation, storage and grid flows. In doing so we consistently take account of current standards, high safety requirements and sensible expansion options. This keeps your energy system flexible. The legal classification of a storage system must be examined separately, even where it is planned together with a generation plant such as photovoltaics or wind power; identical permit thresholds do not automatically follow from this.
Commissioning includes release by the grid operator and proof of the technical requirements, and for storage above 30 kVA also an external grid decoupling protection. A large-scale storage system also needs a safety concept with pressure relief surfaces on the outer wall or roof, fire detection that takes escaping gases into account and extinguishing options that remain effective even after pressure relief. It is coordinated early with the local emergency services. For extinguishing water retention, requirements differ widely depending on the procedure; project-specific case-by-case assessments by independent experts often prove their worth. For industrial batteries above 2 kWh, a battery passport has to be provided from 18 February 2027, so documentation should be kept complete during installation. Technology selection begins with the tender for storage components. On site, local building supervision safeguards execution, environmental construction supervision looks after species, habitats and conditions, and at the end comes technical acceptance. Design measures are intended to prevent damage from spreading from cell to cell; manufacturers' propagation tests are to be reviewed for this. A hazard assessment and early involvement of the insurer are also part of installation planning, as are installation spaces for meters, instrument transformers and communication technology of the grid operator.
