BATTERY ENERGY STORAGE SYSTEMS (BESS)
The manufacturer scalecube i3 grid-scale BESS block 7.25 MWh / 4.6 MVA
Country: Germany · Model: scalecube i3
The scalecube i3 grid-scale storage system is built from BESU blocks of 7,250 kWh usable energy and 4,600 kVA, each with 2 battery containers and 1 PCS station. A block connects to a 10–36 kV, 50 Hz grid through its own 4.6 MVA oil-immersed transformer and MV switchgear. Such plants are built for electricity trading, balancing power and co-location.
- Cells
- LFP prismatic 306 Ah
- Container energy
- 4,073.47 kWh nominal
- BESU block
- 2 battery containers + 1 PCS, 7,250 kWh usable (AC MV), 4,600 kVA
- Grid voltage
- 10–36 kV, 50 Hz
Technical specifications
| Cells | LFP prismatic 306 Ah |
|---|---|
| Container energy | 4,073.47 kWh nominal |
| BESU block | 2 battery containers + 1 PCS, 7,250 kWh usable (AC MV), 4,600 kVA |
| Grid voltage | 10–36 kV, 50 Hz |
| Inverter | 4,600 kVA, 690 V, DC 1003–1500 V, efficiency up to 99.2% |
| Modes | grid-following, grid-forming (virtual synchronous machine) |
| Container | 20 ft, IP55, liquid cooling, ~36 t |
| Operating temperature | −25…+45 °C |
| More from the manufacturer’s documentation | |
| Container dimensions (H × W × D) | 2.896 × 6.058 × 2.438 m |
| BESU layout area (W × D) | 17.5 × 16.2 m (283.5 m²), minimum for service |
| Scaling steps | Fixed steps from 8.1 MWh / 4.6 MVA |
| Max. charge/discharge power | 0.5P |
| Self-discharge | ≤ 3.5% per month (DC decoupled) |
| Sound power level | Battery container 85 ± 3 dB(A); PCS 91 ± 3 dB(A), approx. 85 dB(A) with sound reduction |
| Humidity | < 95%, non-condensing |
| Installation altitude | Up to 2 km above sea level |
| Corrosion protection class | C5 |
| Design life | ≥ 15 years (depending on load profile) |
| Product/performance warranty | Up to 15 years |
| Grid frequency range | 47–53 Hz |
| Communication interfaces | Modbus TCP/IP; with IAU: Modbus RTU, IEC 60870-5-104, IEC 60870-5-101, digital/analog I/O card |
| Applications | Energy trading, multi-market optimization incl. balancing power and co-location, peak shaving, self-consumption optimization, external EMS control, backup power |
| PCS unit: dimensions (H × W × D), weight | 2.896 × 6.058 × 2.438 m, < 18 t |
| PCS IP rating | IP23D (control rooms) / IP54 (inverter electronics) |
| Inverter max. AC current | 3.85 kA |
| Power factor (cos φ) | 0 (ind.) … 1 … 0 (cap.) |
| Max. THD | < 3% at rated power |
| Transformer | Oil type, 4,600 kVA, Dy11, KNAN cooling, impedance 6%, tap changer ±2 × 2.5%, oil containment tray with filter |
| Transformer losses | No-load 4.14 kW, max. 38.7 kW (Eco Design, tier 2) |
| MV switchgear | Cable – cable – circuit breaker, definite-time overcurrent protection, short-circuit withstand 20 kA, 1 s |
| Color | Container RAL 7042; PCS RAL 9016 / RAL 7004 |
| ZEREZ certificates (VDE-AR-N 4110 / 4120 / 4130) | ZE-7ZWF-D8MS |
| Battery standards | EN 61000-6-2, EN 61000-6-4, EN 62619, IEC 62477, IEC 62933-5-2, UN 38.3, UL 1973, NFPA 855, UL 9540A |
| Inverter standards | CE, IEC/EN 62109-1/-2, VDE-AR-N 4110/4120/4130, IEC 61000-6-2, EN 55011, TOR A, TOR B |
| Transformer and switchgear standards | EN 50588-1, IEC 60076; IEC 62271-200, IEC 62271-202 |
| Customs codes (for reference) | |
| HS code | 8507.60 |
| UKTZED code (Ukraine) | 8507600000 |
| CN code (EU) | 85076000 |
Specifications are taken from the manufacturer’s technical documentation. Updated . Customs codes are for reference only; the final code is determined at customs declaration for the specific model.
Description
The 20 ft container uses prismatic 306 Ah LFP cells and stores 4,073.47 kWh nominal, with liquid cooling, IP55 protection and a weight of about 36 t. The 4,600 kVA inverter outputs 690 V, takes 1003–1500 V DC and reaches up to 99.2% efficiency. Besides grid-following mode it runs grid-forming, behaving as a virtual synchronous machine. The Dy11 KNAN transformer has 6% impedance and a ±2 × 2.5% tap changer, with an oil containment tray and filter under the tank. The MV breaker panel withstands 20 kA short-circuit current for 1 s. THD stays below 3% at rated power. The equipment runs from −25 to +45 °C at altitudes up to 2 km.
How to choose
The system grows in fixed steps from 8.1 MWh / 4.6 MVA, and one BESU with service aisles needs a 17.5 × 16.2 m plot (283.5 m²). If the same 4,600 kVA has to carry more energy, look at scalecube i4 with 530 Ah cells and 10.378 MWh per block, though it is rated for 10–33 kV grids and its container is heavier, about 45 t. Where the storage connects to 400 V busbars, the cabinet-type scalepac from 1.016 MWh fits better.
Request a price and lead time
The manufacturer scalecube i3 grid-scale BESS block 7.25 MWh / 4.6 MVA. We reply within one business day.
Or email office@usk.ua or call +38 (044) 339-50-20.
FAQ
How much usable energy does one scalecube i3 block deliver?
A BESU block of 2 battery containers and 1 PCS delivers 7,250 kWh on the MV AC side at 4,600 kVA.
What grid voltage does scalecube i3 connect to?
To 10–36 kV, 50 Hz grids through a 4.6 MVA oil-immersed transformer, with a grid frequency range of 47–53 Hz.
Does scalecube i3 support grid-forming operation?
Yes, the 4,600 kVA inverter runs grid-following and grid-forming, the latter as a virtual synchronous machine.
How loud is a scalecube i3 plant?
Sound power is 85 ± 3 dB(A) for the battery container and 91 ± 3 dB(A) for the PCS, about 85 dB(A) with sound reduction.
Which protocols link scalecube i3 to the control room?
Modbus TCP/IP as standard, plus Modbus RTU, IEC 60870-5-104 and IEC 60870-5-101 via the IAU.
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