Large-scale battery energy storage systems (BESS) for commercial & industrial use

Lower electricity costs & grid fees

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Large-scale battery storage or Battery Energy Storage Systems (BESS) are veritable „multitools“ for a Efficient energy supply of a company, even without photovoltaic systems. Being able to store and access electricity at any time is becoming increasingly important in the context of the energy transition and is also highly rewarded. This Flexibility in consumption ensures reduced overall electricity costs, lower grid charges and can even Yields for their operators.

Regardless of whether a large-scale battery storage purchased or in the Contracting procedure is used - the investment pays off in any case. Especially in combination with photovoltaic systems, they unfold their full potential. Full economic potentialby storing their own surplus electricity and using it as needed. Operators also benefit from additional income from the spot market and grid stabilization services. The use of large-scale battery storage systems for industry and commerce optimizes load management, lowers grid charges and reduces CO₂ emissions. The planned introduction of a capacity market from 2028 will further increase revenue opportunities. In addition, there are funding opportunities through EEG options or Innovation tenders.

Functions & operating modes of BESS

In principle, a distinction is made in BESS applications between:

Behind-the-Meter (BTM): at the corporate network, behind the electricity meter – optimize self-consumption, reduce peak loads, secure residual power supply

Front-of-the-Meter (FTM): on the public grid, upstream of the electricity meter – control energy, energy trading, redispatch

Combinable application areas for BESS

Modern utility-scale battery storage systems are not only capable of stabilizing the internal power grid and providing emergency or backup power (USV unit) or to enable off-grid operation. Especially the Combination of BTM and FTM applications increase savings potential, boost revenues and maximize BESS efficiency.

BTM: Load Shifting

Through targeted load shifting, residual power consumption can be shifted into off-peak hours, thereby achieving atypical grid utilization.

BTM: Peak shaving

Lower capacity charges by reducing peak loads without operational downtime or production restrictions.

BTM: Optimizing Self-Consumption of PV Electricity

Reduction of residual electricity consumption and the necessary CO₂ certificates by increasing the self-consumption rate of a PV system. The surplus electricity is simply stored temporarily.

FTM: Generating Arbitrage Profits Through Electricity Trading

Through arbitrage transactions on the German electricity market Price forecasts can be used to generate significant revenue. (Buy low, sell high)

FTM: Revenue from balancing energy

Free storage capacity on the public balancing energy market to stabilize the electricity grids is remunerated. Additional income can be generated through marketing.

FTM: Working Capital as a New Source of Revenue

Since 2026, the instantaneous reserve has been procured on a market-based basis, providing stable revenue with minimal technical burdens.

Purchase, Contracting, and Leasing of Large-Scale Battery Storage Systems

Experience has shown that large-scale battery storage systems are worthwhile for companies from a Annual consumption of around 8-10 GWh in the medium voltage, which Reduction of 500 kW plan. However, economical dimensioning always depends on the intended use and must be calculated individually. This applies in particular to Purchase intention of an industrial storage system from 1 MW or a large storage system from 5 MW. Here the ROI after just 2.5 or 3 years which, with an expected Service life of 10-15 years justifies an investment. As with all PV projects, CUBE CONCEPTS also offers flexible solutions for large-scale battery storage systems. Contracting or leasing models.

The CUBE BatterySizer for precise and customized large-scale battery storage and BESS solutions

With the CUBE BatterySizerbased on state-of-the-art calculation software, CUBE CONCEPTS quickly determines and plans the optimum dimensioning of large-scale battery storage systems for your company. The powerful analysis tool simulates future load profiles with or without a PV system and calculates the perfect storage solution for your energy supply based on your individual consumption data such as load profiles, electricity tariffs and expected PV yields.

Economic efficiency and Maximum energy efficiency are always at the center of attention. The various applications of the large-scale battery storage systems can be combined as required and viewed holistically. Whether peak shaving, load shifting for atypical grid usage, maximizing PV self-consumption or additional yields through primary control power - the CUBE BatterySizer calculates exactly how you can optimally integrate storage into your energy infrastructure and benefit from it economically.

What savings potential is there in your energy supply? The CUBE BatterySizer is also available to you for a non-binding check ready.

Precise calculations: Customized dimensioning of photovoltaic and battery storage solutions based on a reliable load profile analysis
Profitability forecasts: analysis of profitability including amortization periods and long-term savings.
Peak shaving: Identification of energy-intensive consumers and strategies for load shifting to reduce energy costs.
Load shifting: Calculation of the optimal grid fee reduction through atypical grid usage in accordance with Section 19 (2) sentence 1 StromNEV.
Self-consumption optimization: Analysis of PV surpluses and determination of the appropriate storage system for maximum self-consumption.
Control energy analysis: Calculation of additional income by marketing free storage capacities on the electricity market.

The perfect combination: large-scale battery storage & PV systems with the CUBE EfficiencyUnit

Holistic control of all energy sources, consumers and storage systems with live comparison of all cost factors
Real-time optimization of grid procurement according to current electricity market prices
Automated peak load capping
Efficient control of grid procurement through direct connection to the electricity market
Intelligent control of large-scale battery storage systems with live connection to the primary and secondary control energy markets
Live monitoring and data analysis of profitability with reporting function
Maximization of PV self-consumption according to weather data, consumption and forecasts

Every commercial PV system realized by CUBE CONCEPTS is equipped with the CUBE EfficiencyUnit equipped. It is an innovative Energy Management System (EMS)which supports companies with an efficient energy supply and also controls large-scale battery storage systems. It analyzes electricity prices in real time and calculates weather and consumption data in order to optimize energy use, reduce peak loads and make energy procurement more economical.

As Central control unit it integrates all important energy sources such as mains electricity, photovoltaics, large battery storage and heating systems. Automatic control takes place without manual intervention and always selects the cheapest energy source.

The CUBE EfficiencyUnit processes all internal and external data live, giving companies full control and transparency over their energy supply at all times. The controller installed on site controls machines, charging infrastructure and other consumers in real time and creates detailed energy reports.