Wind power and photovoltaics are key components of a sustainable energy supply. However, changing weather conditions pose a challenge for a consistent power supply. By storing renewable energy in battery storage systems, surplus energy generated in favourable weather conditions can be stored and released again later when wind and solar power levels drop.
The storage of renewable energy in battery storage not only supports the stabilization of the power grid, but also plays a central role in promoting a sustainable energy future. With the help of these technologies, we can both maximise energy efficiency and improve the economic viability of wind and solar energy use. During times of high energy production, when electricity prices tend to be lower, excess electricity is stored in batteries. However, when energy production is lower and prices rise, the stored electricity can be sold. This ensures a continuous power supply.
Battery storage systems, typically equipped with lithium-ion batteries, store energy during periods of high production. The predominantly liquid-cooled battery racks are housed in containers, which, in conjunction with inverters and transformers, enable injection into the medium or high-voltage grid.
The required space for our battery storage system depends on the number of installed containers. A single container typically has dimensions of about 6 metres in length and 2.50 metres in width. For projects with a capacity of 5 to 12 megawatts, a space of 1,000 to 2,000 square metres is needed. The size of the area can be flexibly adjusted depending on the possible capacity and the number of containers used.
The capacity of a storage system depends significantly on the manufacturer. The current standard is around 3.8 megawatt-hours per container. The storage capacity can vary between 2 and 5 megawatt-hours depending on the manufacturer. Given the rapid technological advancements in this field, the possibilities and capacities are constantly expanding.
The installation of battery storage systems is very efficient thanks to pre-configured modules. The systems are usually delivered in such a way that they only need to be connected on-site. The installation process primarily involves site preparation and cable laying. Due to the pre-configuration of the modules, these steps can be completed quickly, significantly reducing the overall installation time.
The sizing of a battery storage system largely depends on the capacities of the local feed-in point. Before Prokon installs such a system, a grid application must be submitted to the responsible grid operator, who then determines the available capacity at the feed-in point. This is crucial, as storage systems, when operating as stand-alone units, are typically connected directly to a substation. The capacity approved by the grid operator thus defines the performance of the storage system to be installed.
Hydrogen storage and battery storage both serve the purpose of energy storage, but they differ fundamentally in their technology and application. Battery storage, often based on lithium-ion technology, stores electrical energy directly and releases it when needed. These are particularly effective for short to medium-term storage requirements and are characterised by rapid energy discharge and high efficiency. Hydrogen storage, on the other hand, uses chemical energy, with hydrogen being produced and stored through electrolysis. This hydrogen can then either be used to regenerate electricity in fuel cells or as a fuel in various industrial processes. Hydrogen storage is especially suited to long-term storage requirements and large amounts of energy, but offers lower efficiency in energy conversion compared to battery storage.
We are interested in leasing or purchasing land to implement energy storage projects. We carefully examine whether it is legally permissible to install a battery storage system on the open land and whether there is sufficient capacity at the substation to connect battery storage systems. Your property could become an important grid connection point that shapes the future of energy.
Site selection & space acquisition
Development & approval
Realisation & construction
Even though we have only recently been intensively involved in the field of energy storage systems, we have already achieved some initial successes. A prime example is the project in Walshausen, which is operated in conjunction with a solar park. This project showcases our ability to successfully implement innovative energy storage solutions and integrate them into existing renewable energy infrastructures. Walshausen serves as an example of Prokon's commitment to actively shaping the energy transition and optimising energy supply through combining renewable energy sources and storage technologies.
