Germany wants to master the energy transition and become more independent in terms of energy supply. This poses complex challenges for the electricity infrastructure: Instability in the power grid, high volatility and high prices.
Stabilizing the grid is therefore essential. Flexible energy storage systems are needed for this purpose. According to the Fraunhofer Institute, the demand for storage will increase more than 200-fold by 2030.
Battery energy storage systems offer a significant opportunity for an independent and sustainable energy supply. The connection to the power grid with its own grid connection enables diverse operating strategies.
The battery energy storage system can store electricity at times when it is not needed and feed it back into the grid when the demand is high. Doing so, it reduces bottlenecks in the grid and sharp fluctuations in the price of electricity.
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Due to the expansion of renewable energies volatility on the electricity market is increasing. Battery storage systems use trading to keep shortfalls or surpluses as low as possible and thus counteract extreme price fluctuations.
Battery energy storage systems are technically very well suited to compensate for unforeseen grid fluctuations. Within a few milliseconds, the storage systems can stabilize the grid on command and prevent power outages.
The increasing share of renewable energies in the energy mix has greatly changed the demands placed on the power grid. Due to the areal shifts in power generation, additional transmission and distribution capacities are necessary. This requires the expansion of extra-high and high-voltage lines. The main problems with the urgently needed new grid infrastructure are the massive costs, the very long construction times and the lack of acceptance among the public. As a result, in many reagions the grid expansion is lagging behind demand and cannot keep pace with the expansion of renewable energies.
From today's perspective, battery energy storage systems are the most economical option for bringing urgently needed flexibility and stability to the power grids in the short term. The decentralized storage of electricity in battery storage systems reduces the acute need for expansion. Fewer lines and substations need to be built. At the same time, it enables greater integration of renewable energies and independence from external energy sources.
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We pursue the goal of making the greatest possible contribution to the energy transition with our projects. Therefore we continuously compare all technical solutions for electricity storage. With less than 10 % losses between power purchase and feed-in, large stationary lithium-ion battery storage systems have a considerable advantage over other storage systems such as hydrogen electrolysis with over 60 % or classic pumped storage power plants with 20-30 % losses. Lithium-ion battery storage systems can also react very dynamically to fluctuations in the power grid and provide energy in fractions of a second if necessary - this is crucial for grid stability when unexpected events and disturbances occur in the power grid. The high energy density of the storage systems results in low land consumption and minimal impact on nature and the environment. As this is a mature technology, development, approval and construction times can be planned very well. All systems used by Kyon Energy can also be recycled at the end of their life cycle, so that the valuable battery raw materials are not lost.
Depending on the size of the battery storage system, its capacity and performance varies. Currently realized projects each have a capacity of around 20 MW and a maximum usable capacity of 24 MWh. Much larger 100 MW storage projects are already in the planning stage. For comparison, an average household in Germany consumes around 8.5 kWh of electricity per day, with consumption peaking at 0.62 kW during the morning and evening hours. A battery storage system with 20 MW output and 40 MWh capacity can thus supply more than 30,000 households for two hours at peak time. With a 100 MW battery storage system, this figure is already over 150,000 households.
A direct purchase from the battery energy storage system is not foreseen in our projects, as they are directly connected to the distribution grid and thus serve the general power supply. They ensure the stability and independence of the power grid and therefore contribute to keeping electricity prices stable or even lowering them in the long term.
The battery storage systems planned by Kyon meet the technical requirements to ensure a black start. In Germany, however, this is not yet possible from a regulatory point of view. A current court case is concerned with the market-based procurement of the black start system service. As long as the market for this has not yet been opened, batteries are prevented from offering their black start capability to network operators for formal reasons in practical implementation.
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