BESS stands for Battery Energy Storage System. In times of volatilepower generation from renewable energies, a BESS plays a key role: it stores electrical energy and makes it available again when needed. In doing so, a BESS contributes to grid stability, supply security, and efficiency in the energy system.
A BESS is a technically advanced system for the intermediate storage and release of electrical energy. It combines modern battery technology with inverters, a battery management system (BMS), and intelligent control. BESS are used in a wide range of applications, from private households to commercial enterprises and large-scale industrial production, as well as for grid-supporting services.
A BESS stores surplus energy – such as from photovoltaic systems or wind power – and releases it later when energy demand is higher than the current supply or the electricity price are high. A BESS converts alternating current into direct current (and vice versa) in order to store or reuse the energy in battery cells. Intelligent energy management systems such as flexOn ensure that the BESS responds optimally to electricity prices, in-house PV production, grid conditions, or production processes.
A BESS is needed to meet the increasing challenges posed by the volatility of renewable energies. Solar and wind power do not generate energy constantly; output depends on the weather and time of day. A BESS can balance these fluctuations and thus ensure a reliable energy supply. In industrial applications, BESS also enable targeted peak shaving and help to reduce electricity costs.
A BESS offers numerous concrete advantages for companies and industrial operations:
Battery-simulation is a key tool when planning and designing a BESS. Using digital models, different scenarios can be tested – for example, to determine optimal sizing, predict lifetime, or calculate the economic viability of a battery storage system. Companies can use a battery-simulation to clarify in advance which capacity, power rating, and operating strategy are most efficient for their needs. Real consumption and generation data, tariff models, and load profiles are included in the simulation. Modern software solutions also make it possible to include PV systems or dynamic grid charges in the simulation so that the interaction of all components can be realistically calculated in advance. In this way, battery-simulations reduce investment risks and help to design a BESS that is both economically and technically well suited.
BESS are a key component of future energy systems. They make it possible to use energy flexibly and efficiently over time, increase independence from the electricity market and make an important contribution to reducing CO₂ emissions.Especially in industry, BESS are becoming increasingly important, for both corporate energy management and participation in flexibility markets.
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