BESS Elsta Plus
premium energy storage

Energy storage
for industry and photovoltaics

Elsta’s proprietary energy storage solution with its own BMS, EMS, dedicated special inverters. This combined with the experience of electric containers guarantees high quality supported by extensive experience. Elsta’s solutions work primarily in industrial plants that want to stabilize daily fluctuations in the load of the power connection and reduce costs.

High standard of fire protection

A product scalable in terms of size and power

EMS system, minimizing energy consumption and fluctuations

Specification of energy storage
of the BESS Elsta Plus series

BESSplus-50/160 | BESSplus-250/0,8 | BESSplus-500/1

General parameters

Connection to the power grid depending on the transformer matching the 3-phase system, 50/60 Hz, voltage LV up to 800 V or MV up to 20 kV
Nominal energy from 157 kWh to 1 MWh
Nominal discharge / charging power 50 kW, 250 kW or 500 kW
Operating temperature, -25 ÷ +40 °C

Enclosure protection class according to EN 60529 IP 54

BESSplus-50/160
Container dimensions 5.65 m x 1.8 m x 3 m (L x W x H)
Total weight
8000 kg

BESSplus-250/0,8
Container dimensions
9 m x 1.8 m x 3.4 m (L x W x H)
Total weight
22,300 kg

BESSplus-500/1
Container dimensions
12 m x 1.8 m x 3.4 m (L x W x H)
Total weight
28,350 kg

Li-Ion LFP battery chemistry

BESSplus-50/160
Operating voltage range
440 – 642 V DC
Number of battery cells
connected in parallel 1
Number of guaranteed cycles
dependent on DoD, operating conditions 3600 – 6000

BESSplus-250/0,8
Operating voltage range
660 – 964 V DC
Number of battery cells connected in parallel 4
Number of guaranteed cycles dependent on DoD, operating conditions 3600 – 6000

BESSplus-500/1
Operating voltage range
660 – 964 V DC
Number of battery cells connected in parallel 5
Number of guaranteed cycles dependent on DoD, operating conditions 3600 – 6000

BESSplus-50/160
Rated Converter Power Charging / Discharging
50 kW
DC Bus Voltage
436 – 797 V DC
Operating Current
AC Current from Mains Side 80 A

BESSplus-250/0,8
Rated Converter Power Charging / Discharging
250 kW
DC Bus Voltage 640 – 1100 V DC
Operating Current AC Current from Mains Side 435 A

BESSplus-500/1
Rated Converter Power Charging / Discharging
500 kW
DC Bus Voltage 640 – 1100 V DC
Operating Current AC Current from Mains Side 915 A

Ethernet (ModBus TCP/IP) IEC 61850

Bezpieczeństwo obsługi i instalacji
system kontroli pracy baterii BMS, system Alarmu Pożaru, system gaszenia gazem inertnym

Certificates

  • power electronic systems: RfG 2016/631
  • battery banks: PN-EN 62281, PN-EN 62619
  • technical containers: PN-EN IEC 62933-5-2, PN-EN 62262:2003, PN-EN 60529:200
  • fire resistance class: REI60
  • high degree of protection: IP54 or IP55
  • lithium cells in safe and proven LFP technology

Dedicated EMS system
minimizing energy consumption and fluctuations

Thanks to a team of programmers and automation engineers, we offer advanced and ergonomic software applications for control in the broadly understood industry and production automation.

3-phase system, 50/60 Hz,
LV voltage up to 800 V or
MV voltage up to 20 kV
Nominal energy up to 1 MWh

Housing protection class
according to EN 60529 IP 54
Total weight from 8 to 28.3 tons

Li-Ion LFP batteries
Guaranteed cycle count up to 6,000

Communication
Ethernet (ModBus TCP/IP)
IEC 61850

Safety
Battery management system (BMS),
Fire alarm,
Inert gas extinguishing

Full documentation, commissioning,
logistical, technical
and after-sales support, and maintenance

Flexible project
implementation process

Elsta’s comprehensive sales cycle provides full support at every stage of implementing energy storage solutions. From initial diagnostics of needs, through the development of a technical and economic concept, to production, installation and after-sales services – each step is tailored to the individual requirements of the customer.

Thanks to our experience and expertise, we guarantee high quality, timeliness and satisfaction with the solutions delivered, supporting energy transformation and sustainable development.

We know that energy storage is not just a product.

It is a long-term relationship, agile management and freedom of choice thanks to proven, safe and modern solutions.

We accompany our clients in consciously designing a sustainable future.

We build long-term relationships that enable the development of your business by ensuring that our storage facilities exceed your needs and development plans.

We focus on modularity and flexibility of solutions.

Who Elsta,
what sets us apart

  • many years of experience – we have over 30 years of experience in energy and industrial electronics, including the design and production of e-house energy containers, with particular emphasis on energy conditioning
  • the highest quality – we test our devices at every stage of the production process, verifying their correct operation and compatibility with other infrastructure, we conduct solution testing and meticulous quality control; the highest quality is confirmed by the obtained certificates
  • modern technologies – we use modern technologies, including Li-Ion cell technology, which enables energy storage in batteries and its release from direct current to alternating current using a DC/AC converter, ensuring bidirectional conversion – discharging and charging of batteries
  • safety of operation, installation, use – we care about your safety and comfort of use as well as the durability of our warehouses even in extreme conditions (REI60 fire resistance class, high degree of protection IP54 or IP55, lithium cells in safe and proven LFP technology, thermal conditioning system, detection and protection in the event of fire)
  • RND and a multidisciplinary team of experts – as a multidisciplinary engineering team, we support the entire solution for the construction, electrical, software and start-up parts, we provide technical support during acceptance; together with academics from Polish universities, we conduct research and development work that enables further optimization of the offered solutions
  • ecology – we take an active part in the energy transformation by creating solutions that build a sustainable future for your business
  • individual approach – your needs and conditions are unique, we know that, which is why the offered solutions are dedicated only to you
  • service – our cooperation begins at the stage of diagnosing your needs, we accompany you both during implementation and later use of the warehouse, providing necessary updates and optimizations
    diagnosing individual needs – we help diagnose your needs and design the optimal solution for you
  • comprehensive implementation – we know how important comprehensive service and central management are to you, which is why we have focused on a multidisciplinary team of experts and a business model supporting long-term relationships
    modularity – the modular design of our warehouses means convenient transport and assembly, but above all flexibility in the event of further expansion
  • design – modern, unique design allows for personalization of colors and markings

BESS Elsta Plus energy storage
sales process

Needs
diagnostics

We start cooperation with a thorough analysis of your needs. Our experts will conduct detailed diagnostics to understand the specifics of your facility and the goals you want to achieve. Thanks to this, we will be able to propose solutions that are perfectly tailored to your requirements.

Technical and economic
concept

Based on the information collected, we develop a concept that takes into account both technical and financial aspects. Our experience allows us to create optimal solutions that will not only meet your expectations, but will also be economically beneficial.

Personalized
design

Each project is unique, which is why we adapt it to your individual needs. Our team works with you at every stage to make sure that all elements are in line with expectations.

Solution selection
and delivery completion

We choose the best technological solutions that will be a perfect fit for your project. Our knowledge and experience allow us to effectively complete deliveries, which guarantees that everything needed to implement the project will be available on time.

Production, electrical assembly
and in-house programming

All key system elements are manufactured and assembled at our headquarters by a qualified team of specialists. Thanks to this, we have full control over the quality and timeliness of implementation. Our skills in electrical assembly and programming ensure that each project is carried out with the utmost care.

Installation
on site

When everything is ready, we begin transport and installation on your site. Our technicians, with extensive experience, ensure that the process runs smoothly and without disruptions. We always focus on safety and minimizing inconvenience to our customers.

After-sales
services

Our cooperation does not end with installation. We offer comprehensive after-sales services to ensure that your system works flawlessly. We are always available to answer your questions and provide support whenever you need it. Your trust is most important to us!

What is an energy storage

Energy storage is the key to the future of energy and sustainable business. It offers independence, ensures continuity of energy supply and optimizes the costs of its acquisition and production. The BESS Elsta system is an innovative solution based on proven container housings for electrical devices.

BESS Elsta storages are available in the form of classic 20, 30 and 40 ft containers, as well as in a proprietary, modular steel housing, adapted to specific parameters. Thanks to modern technologies, Elsta energy storages are fully scalable, which allows for flexible adjustment of power and output energy to changing needs.

Related products

BESS Elsta
economic energy storage

Elsta’s proprietary energy storage solution with its own BMS, EMS, dedicated special inverters. This combined with the experience of electric containers guarantees high quality supported by extensive experience.

Software,
SCADA and HMI applications

Depending on the needs and size of the device or object, we offer tailored HMI and SCADA systems in the form of a user-friendly and fully functional human-machine or human-process interface.

Elsta PCS inverter
inverter for energy storage

Bidirectional AC/DC converter, designed for photovoltaic systems. It offers a series of types with an efficiency of 250 A (≤150 kW) and 500 A (≤300 kW) with the possibility of parallel operation, which allows for flexible power adjustment.

Contact us

We will be happy to answer your questions
and select the right solution for you.

Operating since 1988, Elsta provides comprehensive solutions in the areas of electrical engineering, automation and energy, implementing projects both in Poland and on foreign markets around the world.

Follow us
on social media

Elsta sp. z o.o.
32 Janińska St., 32-020 Wieliczka, PL

CALL US
+48 12 350 13 50

general e-mail office@elsta.pl
e-mail for offer inquiries rfq@elsta.pl

A company registered in the District Court for Kraków Śródmieście in Kraków, XII Commercial Division of the National Court Register KRS 0000100416 REGON 356526640, NIP 6831865970, BDO 000068605,
Share capital PLN 295 100.00 fully paid up.

We will be happy to answer your questions
and help select the right solution,
please contact us.

OR CALL US
+48 12 350 13 50

Elsta sp.z o.o. © 2025