BESS stands for Battery Energy Storage System — i.e. battery storage system. In times of volatile electricity generation through renewable energy sources, a BESS plays a key role: It stores electrical energy and makes it available again when needed. In this way, a BESS contributes to grid stability, security of supply and efficiency in the energy system.
A BESS is a technically sophisticated system for intermediate storage and delivery of electrical energy. It combines modern battery technology with inverters, a battery management system (BMS) and intelligent control. BESS is used in a wide range of applications, from private households and commercial enterprises to industrial production or network-related system services.
A BESS stores excess energy — for example from photovoltaic systems or wind power — and releases it again later when energy demand is higher than the current supply or the electricity price is expensive. A BESS converts alternating current into direct current (and vice versa) in order to store or reuse the energy in battery cells. systems for intelligent energy management like FlexON ensure that BESS reacts optimally to electricity prices, its own PV production, grid conditions or production processes.
A BESS is needed to meet the increasing challenges posed by volatility balance out renewable energy sources. Solar and wind power do not generate energy constantly, but depends on the weather and time of day. A BESS can compensate for these fluctuations and thus ensure a reliable energy supply. In industrial applications, BESS also enables targeted Peak load capping and help to reduce electricity costs.
A BESS offers numerous concrete advantages for companies and industrial enterprises:
Die battery simulation is a crucial tool when planning and designing BESS. With the help of digital models, various scenarios can be played out — for example for optimal sizing, life expectancy or economic analysis of a battery storage. With battery simulation, companies can clarify in advance which capacity, performance and operating strategy is most efficient for their needs. Real consumption and generation data, tariff models and load profiles are incorporated into the simulation. Modern software solutions make it possible to include PV systems or dynamic grid charges in battery 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 plan BESS precisely, economically and technically.
BESS is a central component of the energy systems of the future. They make it possible to use energy flexibly and efficiently, increase independence from the electricity market and make an important contribution to reducing CO₂ emissions. In industry in particular, BESS is gaining in importance — both for Energy management in companies as well as for participation in flexibility markets.

More and more companies are planning to invest in battery storage systems. Whether to cut peak loads, optimize self-consumption or as part of a multi-use approach: Expectations are high. But storage is bought too often before it is clear what it can really do in a specific application. A well-founded battery simulation can prevent just that.

The importance of energy efficiency for companies is constantly growing. Both environmental responsibility and cost savings have a decisive impact on their competitiveness. In this article, we take a closer look at the most important facts about energy efficiency and show how companies can improve it.

The 2025 coalition agreement brings new drive to energy policy. The new federal government (CDU, CSU, SPD) is committed to climate neutrality by 2045 — with specific goals for more renewable energy, digitalization and, above all, more flexibility in the energy system. For industrial companies, this means that energy optimization is becoming a strategic success factor.