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The most recent update regarding BESS installations is that in Tume and Rēzekne, Latvia’s transmission system operator “Augstsprieguma tīkli” (AST) in June 2025 installed battery energy storage systems with a combined capacity of 80 MW and 160 MWh, which will undergo testing until October 2025.
Latvia’s Recovery and Resilience Plan plays a key role in the energy transition, supporting economic recovery through major investments in renewables like wind, solar, and biomass, as well as initiatives such as a 60 MW Battery Energy Storage System by 2026 and cross-border projects to synchronize with Continental Europe .
Latvia’s Energy Strategy 2050 outlines major changes in renewable energy production and storage, with significant investments planned in wind, solar, biomass, and biogas, as well as in energy storage technologies like batteries and subsurface systems to ensure supply stability .
Local authorities are responsible for municipal energy supply and renewable energy projects, with Latvia’s energy transition guided by the National Energy and Climate Plan and the Energy Strategy 2050.
In future developments, innovations in energy storage technologies will further enhance their role in the energy transition. For instance, improving the energy density of battery containers is an important direction in the development of current battery technologies.
Although energy storage technologies still face certain challenges in terms of cost, efficiency, and large-scale application, with ongoing research and development and increased policy support, the future development prospects of energy storage technologies are vast.
Energy storage is utilized for several applications like power peak shaving, renewable energy, improved building energy systems, and enhanced transportation. ESS can be classified based on its application . 6.1. General applications
Various application domains are considered. Energy storage is one of the hot points of research in electrical power engineering as it is essential in power systems. It can improve power system stability, shorten energy generation environmental influence, enhance system efficiency, and also raise renewable energy source penetrations.
An energy storage system (ESS) for electricity generation uses electricity (or some other energy source, such as solar-thermal energy) to charge an energy storage system or device, which is discharged to supply (generate) electricity when needed at desired levels and quality. ESSs provide a variety of services to support electric power grids.
Electrical energy storage systems (ESS) commonly support electric grids. Types of energy storage systems include: Pumped hydro storage, also known as pumped-storage hydropower, can be compared to a giant battery consisting of two water reservoirs of differing elevations.
Variable power is produced by several renewable energy sources, including solar and wind. Storage systems can help to balance out the supply and demand imbalances that this produces. Electricity must be used promptly when it is generated or transformed into storable forms.
Zakeri and Syri also report that the most cost-efficient energy storage systems are pumped hydro and compressed air energy systems for bulk energy storage, and flywheels for power quality and frequency regulation applications.
As of 2018, the global energy storage capacity is 8 GWh. This capacity is continuing to increase at an exponential rate, with pumped hydro storage accounting for 96.2% of the worldwide storage capacity.
The world’s largest rolling stock manufacturer says that its new container storage system uses LFP cells with a 3.2 V/314 Ah capacity. The system also features a DC voltage range of 1,081.6 V to 1,497.6 V. From ESS News
Accoding to ESπ, Envision Energy's "Integrated AC-DC" 5.0/5.6MWh energy storage system series was officially rolled out at its Jiangyin factory. The series includes two standard 20-foot container models with capacities of 5MWh and 5.6MWh, the latter being the world's largest capacity "Integrated AC-DC" energy storage system.
The series includes two standard 20-foot container models with capacities of 5MWh and 5.6MWh, the latter being the world's largest capacity "Integrated AC-DC" energy storage system. The launch of the 5.0/5.6MWh energy storage systems marks Envision Energy's readiness for mass production and delivery of its "Integrated AC-DC" series.
The existing thermal runaway and barrel effect of energy storage container with multiple battery packs have become a hot topic of research. This paper innovatively proposes an optimized system for the development of a healthy air ventilation by changing the working direction of the battery container fan to solve the above problems.
In this paper, the heat dissipation behavior of the thermal management system of the container energy storage system is investigated based on the fluid dynamics simulation method. The results of the effort show that poor airflow organization of the cooling air is a significant influencing factor leading to uneven internal cell temperatures.
The energy storage system (ESS) studied in this paper is a 1200 mm × 1780 mm × 950 mm container, which consists of 14 battery packs connected in series and arranged in two columns in the inner part of the battery container, as shown in Fig. 1. Fig. 1. Energy storage system layout.
Thus, the energy storage system consists of 336 LIB cells. The LIBs are square lithium iron phosphate batteries, each with a rated voltage of 3.2 V and a rated capacity of 150 Ah. Fig. 2.
