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Containerised battery energy storage systems

W ENERGY Turtle 5 MWh containerised energy storage system

Overview

A containerised storage system is a complete power block inside a 20-foot container: battery modules, cooling, fire suppression and controls are assembled and tested at the factory. What arrives on site is a finished product that only has to be connected.

It is used wherever the scale is measured in megawatt-hours: beside a solar plant, on the grounds of a plant with a heavy peak load, or as part of a microgrid.

What it addresses:

peak tariffs — charging during the cheap hours, discharging at the peak;
backup during outages, with no pause to start;
extra capacity without increasing the contracted supply;
working with a solar plant — surplus generation is stored rather than curtailed by the inverter.

Models and specifications

All figures are as stated by the manufacturer.

Turtle 5 MWh — 20-foot container, liquid cooling

Parameter	Value
Capacity	5.016 MWh
Charge / discharge power	2.5 MW
DC voltage	1331.2 V (range 1164.8–1497.6 V)
Battery	314 Ah cells, liquid cooled
System efficiency	88 %
Dimensions	6058 × 2438 × 2896 mm (standard 20-foot)
Weight	up to 43 t
Degree of protection	IP55 (excluding the cooling and air-conditioning compartments)
Operating temperature	−30 to +50 °C (derating above +45 °C)
Protocols	CAN, IEC 61850, IEC 104, TCP, MODBUS RTU
Certification	IEC 62619:2022, IEC 62477-1, EN IEC 61000-6-2/-4, EN 55011, IEC 63056, UN 38.3

Turtle 3.85 MWh — liquid cooling

Parameter	Value
Capacity	3.85 MWh
Power	2 MW
Battery	LFP, 314 Ah cells
DC voltage	1228.8 V (range 960–1401.6 V)
Efficiency	over 89 %
Dimensions	20-foot container
Weight	no more than 36 t
Degree of protection	IP54 · noise below 75 dB at 1 m
Installation altitude	up to 4000 m (derating above 2000 m)
Certification	IEC 62619 / 62933 / 62477 / 63056, UL 1973, UL 9540, UL 9540A, CE, UN 38.3, TÜV, DNV, NFPA 69

Turtle CL2.5 — container with integrated AC/DC equipment

Supplied in three capacity configurations — for the energy reserve you need at the same power rating.

Parameter	Value
Capacity (three configurations)	2.507 / 2.089 / 1.67 MWh
AC power	1000 kW
Battery	LFP, 314 Ah cells (6P416S / 5P416S / 4P416S)
DC voltage	1164.8–1497.6 V
Dimensions	6058 × 2438 × 2896 mm (20-foot)
Weight	27.5 / 25 / 22.5 t by configuration
Degree of protection	IP54 (battery compartment) · corrosion class C4H
Operating temperature	−25 to +55 °C
Fire suppression	aerosol, smoke and temperature detectors, explosion-proof ventilation

Turtle 3.85 technical parameters — per the manufacturer's datasheet

Data from the manufacturer's technical specification for the ES-1228.8V3140Ah system. The table below complements the model table above: capacity configurations, electrical limits and operating conditions.

Parameter	Value	Source in the datasheet
Capacity configurations	2700 · 3086 · 3472 · 3858 kWh (7P · 8P · 9P · 10P)	Table 7, row 5, p. 13
1075.2 V variant	3376 kWh, combination (((12S)4S)7S)10P	Table 7, rows 1, 2, 5
Nominal DC voltage	1228.8 V (1075.2 V for the 1075.2 V variant)	Table 7, row 2
DC operating range	960–1401.6 V (840–1226.4 V for the 1075.2 V variant)	Table 7, row 4; Table 2, rows 13–14
Rated DC current	1570 A for 3858 kWh; 1413 · 1256 · 1099 A for 3472 · 3086 · 2700	Table 2, row 15; Table 7, row 6
Max. continuous DC current	1600 A for 3858; 1440 · 1280 · 1120 A for the smaller configurations	Table 2, row 16; Table 7, row 7
Cell	314 Ah, operating voltage 2.5–3.65 V, weight 5.8 ± 0.3 kg	Table 3, p. 8
Battery module	(12S)4S · 153.6 V · 48.23 kWh · 325 ± 15 kg	Table 4, p. 9
Battery cluster	((12S)4S)8S · 1228.8 V · 385.8 kWh · 2640 ± 130 kg	Table 5, p. 10
Operating conditions	−15 to +50 °C, humidity 0–95%, altitude up to 4000 m (derating above 2000 m)	Table 2, rows 5–7
Container weight	≤36 t (3858); ≤33.4 · ≤30.7 · ≤28.1 t for 3472 · 3086 · 2700	Table 7, row 12
Container dimensions	6058 × 2438 × 2896 mm (20-foot)	Table 2, row 12
Battery management	Three-level BMS: BMU + BCU + BAU; CAN / RS485 communication	sec. 3.5 and Table 8, p. 14
Design standards	GB/T 36276-2018, GB/T 34131-2023, GB/T 34120-2017, GB/T 34133-2017; the relevant IEC standards are referenced in the specification	sec. 1.2, p. 4

Current and weight depend on the chosen configuration: the fewer parallel strings, the lower the operating current and the container weight. Capacity, power rating and the connection scheme we select for your specific site.

Official dealership

LK Energy is an official dealer of Wincle Energy Pte. Ltd. (Singapore), the W ENERGY brand. The certificate runs from January 2026 to January 2027.

Official dealer certificate issued by Wincle Energy Pte. Ltd. to LK Energy for 2026–2027

View the certificate as a PDF

Where this is already running

The first row is our own site: LK Energy was the EPC contractor there, from design through to commissioning, and we service those same systems. The rest are the manufacturer's installations, as reported by the manufacturer — they were not built by LK Energy; they show the scale at which the equipment operates.

Site	Scale
Industrial solar plant, Odesa region — our own site	4.95 MW / 20.064 MWh → see the case
Netherlands	20 MW / 41.28 MWh
Zimbabwe — microgrid: solar, storage, diesel	9 MW / 18 MWh
China	6 MW / 12 MWh
Bulgaria — solar plant with storage	1.725 MW / 3.85 MWh

What our own work covers

We supply the equipment as an official dealer. Our own part is everything around it:

The switchgear. The container has to be brought into the switchgear: switching, protection, metering and reconciliation with the site's existing scheme. That switchgear is designed and built by our plant in Odesa — not subcontracted.
Installation and commissioning — receiving the container by crane onto a prepared pad, connecting it, putting it into service.
Servicing — scheduled maintenance, BMS checks, battery diagnostics: BESS servicing.

Questions & answers

FAQ

What kind of pad does the container need?

A prepared base for the weight of the unit — between 22.5 and 43 t depending on the model — and access for a crane. All three models are standard 20-foot containers, so transport is routine.

Does the container work outdoors all year?

Yes, it is built for outdoor installation: IP54 to IP55 depending on the model, with its own cooling and heating, and an operating range of −30 to +50 °C on the Turtle 5 MWh and −25 to +55 °C on the CL2.5.

How is the container connected to the site?

It depends on the scheme: at low voltage through 0.4 kV switchgear, or at medium voltage through its own transformer substation. We determine the arrangement from your single-line diagram — and that part we design and build ourselves.

How long will the system last?

Life depends on depth of discharge and the temperature regime. For models where the manufacturer states a cycle life, we quote it in the proposal together with the manufacturer's documentation.

Can several containers be installed?

Yes, the systems scale — that is exactly how tens of megawatt-hours are assembled on large sites. We calculate the number of units and the connection arrangement for the power and energy required.

Can we order less than 3.85 MWh?

Yes. The manufacturer offers four configurations in the same 20-foot container: 2700, 3086, 3472 and 3858 kWh, differing in the number of parallel strings (7P, 8P, 9P, 10P). There is also a variant with a nominal voltage of 1075.2 V rated at 3376 kWh. A smaller configuration means a lower operating current (1099–1413 A against 1570 A) and a lighter container (from ≤28.1 t). Which one suits you depends on the connection scheme and your daily load profile — we work it out together.

What are the operating conditions of the container?

The operating temperature range is −15 to +50 °C, humidity up to 95%, installation altitude up to 4000 m above sea level, with derating above 2000 m. At battery module level, charging is permitted from +5 to +55 °C and discharging from −15 to +55 °C. Cooling is liquid, and the system is managed by a three-level BMS with CAN and RS485 interfaces.

Price request:
Containerised battery energy storage systems

Send us your single-line diagram or specification — we will estimate the configuration, lead time and price. Preliminary estimate within 24 business hours.

+380 67 104 94 91

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