Storage cabinets and containerised energy storage systems.
- 100–5,015 kWh
- capacity per unit
- up to 1,000 kW
- power per unit
- 20 ms
- switchover via STS
Energy storage (BESS) in Ukraine — systems for storing electrical energy
Battery systems for energy storage and management
What the service includes
Electrical energy storage systems (ESS, BESS — Battery Energy Storage System) are modern technological solutions designed for the accumulation, storage and subsequent use of electricity. They play an important role in the development of Ukraine’s energy infrastructure, ensuring stable power supply, improved energy efficiency and the integration of renewable energy sources.
With the growing need for energy independence, energy storage systems are becoming a relevant solution for industrial enterprises, commercial facilities, energy companies, solar and wind power plants, and critical infrastructure facilities.
The use of BESS makes it possible to store electricity during periods of surplus or low cost and to use it when there is increased demand for electrical power.
What is an energy storage system (BESS)?
An energy storage system (ESS) is a set of equipment that provides for the accumulation of electrical energy, its storage and its subsequent transfer to the electricity grid or directly to the consumer.
The main elements of such systems are batteries, which operate together with power converters and management and control systems.
A typical BESS consists of the following components:
- Batteries — provide the accumulation and storage of electrical energy.
- Battery management system (BMS) — monitors the condition of the battery cells, temperature, voltage, current and state of charge.
- Power conversion system (PCS) — converts direct current to alternating current and vice versa.
- Energy management system (EMS) — controls the processes of charging, discharging and distribution of electricity.
- Thermal management system — maintains the optimum operating temperature of the batteries.
- Fire safety and protection systems — provide monitoring and protection of the equipment in emergency situations.
- Monitoring system — makes it possible to monitor the operation of the installation and analyse its key parameters.
All components operate as a single system, ensuring efficient and controlled use of the stored electricity.
How energy storage works
A battery energy storage system (BESS) is a cabinet or container with batteries, a power converter and a control system. It charges when energy is available and cheaper, and supplies the site when the grid is unavailable or energy is more expensive.
Problem
Grid outages stop equipment, exceeding the contracted capacity leads to surcharges, and energy at peak hours costs more.
Solution
The storage system holds electricity and releases it to the site when needed: during a grid outage, at peak hours or in the evening after the solar plant stops generating.
How the cabinet operates
- 01
Charging
The cabinet charges from the grid during low-tariff hours or from the solar plant during the day.
- 02
Storage
Energy is stored in lithium iron phosphate (LFP) batteries. The control system monitors charge, temperature, cooling and fire suppression.
- 03
Conversion
The built-in converter turns the batteries’ direct current into 400 V alternating current — the voltage of the site network.
- 04
Supplying the site
At peak hours or during a grid outage the cabinet supplies the site equipment. Several cabinets are combined into one system through an STS cabinet.
Partners: Elecnova and Sigenergy
We supply, install and connect energy storage systems from two manufacturers.
SigenStack modular storage with a hybrid inverter.
- 12 kWh
- module capacity
- 50–125 kW
- hybrid inverter
- 4–21
- modules per inverter
Choosing a system
The systems differ in scale, connection and installation. The final choice is determined by a calculation based on the site’s consumption profile.
ElecnovaSigenergy SigenStack
Capacity stepCabinet 100–418 kWh, container up to 5 MWh12.06 kWh module
ScaleFrom 100 kWh to several MWhFrom 48 kWh to several MWh
ConnectionTo the 0.4 kV grid; hybrid cabinets — together with a solar plantThrough a hybrid inverter together with a solar plant
Switchover to backup20 ms via an STS cabinet0 ms via Gateway
InstallationCabinet or container placed on a prepared pad by craneModules stacked on each other, no crane; about an hour per system
ApplicationLarge site, existing solar plant, fast start-upNew solar plant with storage, staged expansion
Main advantages of energy storage systems
The implementation of energy storage systems enables enterprises and energy facilities to obtain a number of technical and economic advantages:
- Greater energy independence. The ability to use stored electricity during supply restrictions or interruptions, subject to the appropriate system configuration.
- Backup power supply. Supplying power to critical equipment and consumers during emergency outages.
- Optimisation of electricity costs. Storing electricity during lower-cost periods and using it during peak consumption periods.
- Reduction of peak loads. Lowering the maximum level of power consumption through the use of stored energy.
- Integration of renewable energy sources. More efficient use of electricity generated by solar and wind power plants.
- Improved grid stability. The possibility of participating in power regulation and the provision of ancillary services, subject to the relevant technical and regulatory conditions.
- Optimisation of energy consumption. Rational distribution of electricity in accordance with the needs of the facility.
Where are BESS used?
Electricity storage systems have a wide range of applications and can be used both at individual facilities and on the scale of energy infrastructure.
- 01
Industrial enterprises
For manufacturing enterprises, energy storage systems help to optimise electricity consumption schedules, reduce peak loads and provide backup power for critical equipment.
- 02
Commercial facilities
Shopping centres, business centres, logistics complexes, warehouses and office buildings can use BESS to optimise electricity costs and improve the reliability of power supply.
- 03
Solar and wind power plants
Integrating storage systems with renewable energy sources makes it possible to store surplus electricity and use it during periods of reduced generation or increased demand.
- 04
Critical infrastructure facilities
BESS can provide backup power for hospitals, water supply facilities, telecommunications infrastructure and other facilities for which continuity of power supply is of particular importance.
- 05
Energy companies
Industrial energy storage systems can be used for balancing the power system, power regulation and participation in market mechanisms, subject to the relevant technical capabilities and permits.
Types of electricity storage systems
Depending on their purpose, power and operating conditions, energy storage systems are divided into several main categories.
- Residential energy storage systems — compact solutions for private houses that provide backup power and optimise the use of electricity.
- Commercial BESS — installations for office centres, retail facilities, enterprises and commercial property.
- Industrial energy storage systems — high-power installations for large enterprises, manufacturing facilities and energy infrastructure.
- Containerised BESS — modular high-power solutions housed in specialised containers with cooling, control and safety systems.
The choice of the optimal system depends on the required power, storage capacity, operating mode, connection specifics and the economic model of electricity use.
Design and installation of energy storage systems in Ukraine
The implementation of electricity storage systems requires an integrated engineering approach. At the initial stage, the facility’s energy consumption is analysed, the required system parameters are determined and a technical solution is developed.
The main stages of project implementation:
- Energy audit. Analysis of electricity consumption profiles, peak loads and the needs of the facility.
- Feasibility study. Assessment of the viability of installing BESS and determination of the required power and capacity of the system.
- Design. Development of electrical, structural and system solutions.
- Equipment selection. Selection of batteries, inverters, control systems and auxiliary equipment.
- Supply and installation. Delivery of the equipment, installation and connection of the system.
- Configuration and integration. Configuration of the BMS, PCS and EMS and of their interaction with the electricity grid and other power sources.
- Commissioning works. Verification of system operation and putting the system into service.
Energy storage systems for renewable energy
One of the most promising applications of BESS is integration with solar and wind power plants.
Renewable electricity generation depends on weather conditions and the time of day. Storage systems make it possible to store surplus electricity generated and to use it during periods of insufficient generation.
Combining solar power plants with BESS makes it possible to:
- Increase the efficiency of using the electricity generated.
- Reduce the volume of generation curtailment.
- Ensure a more predictable electricity output schedule.
- Optimise the operation of energy equipment.
- Increase the flexibility of the energy system.
Such solutions are particularly relevant for the development of distributed generation and for improving the resilience of Ukraine’s energy infrastructure.
Safety and operation of BESS
Safety is one of the key aspects of the design and operation of electricity storage systems.
Modern BESS installations are equipped with a set of control and protection devices that monitor temperature, voltage, current, the condition of battery cells and equipment operating parameters.
The design takes into account the requirements for ventilation and cooling, fire protection, electrical safety, equipment placement and emergency shutdown.
Correct equipment selection, professional installation, configuration of control systems and regular maintenance are essential conditions for the reliable operation of an energy storage system.
Energy storage systems (BESS) in Ukraine — an investment in energy independence
The development of electrical energy storage systems is an important area in the modernisation of Ukraine’s energy sector. Energy storage systems help to improve the stability of power supply, make more efficient use of renewable energy sources and optimise electricity costs.
The implementation of modern BESS opens up new opportunities for industrial enterprises, commercial facilities, energy companies and investors.
A well-designed energy storage system is a technological solution that contributes to greater energy efficiency, flexibility and reliability of Ukraine’s energy infrastructure.
Storage operating modes
The four main modes in which storage works on a site every day.
Peak load reduction
When consumption exceeds the contracted capacity, the battery covers the difference.
Time-of-use tariffs
The battery charges at night at the low tariff and releases energy at peak hours.
Solar energy in the evening
The solar plant’s daytime surplus is stored and used in the evening and at night.
Day: charging from PVEvening: supply from battery
Backup power
During a grid outage critical equipment automatically switches to supply from the storage system.
- 20 ms
- Elecnova, STS cabinet
- 0 ms
- Sigenergy, Gateway
Frequently asked questions
How much does a battery energy storage system cost?
A manager determines the exact price after sizing capacity and power for the consumption profile. It depends on which processes require backup and for how long, on the location and on the extent of the construction works. Indicative figures are not provided before the calculation; consumption data are required for it.
How is the capacity determined?
Capacity is determined by calculation. It requires a list of equipment that cannot be stopped, the desired duration of autonomous operation and the actual consumption schedule. Power and capacity are calculated separately, and we show how the cost changes as the list of critical loads is reduced.
Can BESS be installed without a solar plant?
Yes. The storage also works from the grid: it charges while supply is available and discharges during an outage or at peak. A solar plant adds an on-site charging source but is a separate decision; if it is planned for later, this is taken into account in the scheme.
Will production stop while the system is connected?
A full shutdown is not required. Modules, inverters and cable routes are installed without an outage. A short interruption is needed only for the switchover in the switchgear, in a period agreed with the client’s process engineers. The switching sequence is fixed in the work plan.
Send a request
Send a description of the task or the drawings and we will prepare a technical solution and a cost calculation.
Cost estimate for the works
Send us drawings or a technical specification and we will prepare a technical solution and a cost estimate.