PowerConnect Technologies

Products / ESS Balance of System (BOS)

ESS Balance of System (BOS)

Complete balance of system components for containerized and utility-scale energy storage projects. DC fuses, EMS cabinets, battery racks, liquid cooling, and fire suppression — single-source procurement.

DC Fuse 1500V for ESS Battery Protection

DC Fuse 1500V for ESS Battery Protection

High-speed DC semiconductor fuse for energy storage battery protection. 1500V DC rated, 50A-630A current range, gR/gS class for battery circuit protection. UL 248-13 and IEC 60269 certified.

Key Specifications

Rated Voltage1500V DC
Current Range50A, 63A, 80A, 100A, 160A, 200A, 315A, 400A, 500A, 630A
Breaking Capacity100kA DC (L/R ≤ 10ms)
ClassgR / gS (semiconductor)
Power Loss< 25W at rated current
StandardsUL 248-13, IEC 60269-6, RoHS

Features

  • 1500V DC rated voltage
  • Current range: 50A-630A
  • gR/gS class — semiconductor protection
  • Breaking capacity: 100kA DC
  • Low I²t for fast fault clearing
Battery Rack ProtectionDC Combiner BoxPCS DC Side ProtectionContainerized BESSUtility-Scale Storage
EMS Control Cabinet for Containerized ESS

EMS Control Cabinet for Containerized ESS

Pre-assembled energy management system (EMS) control cabinet for containerized battery energy storage systems. Integrated PLC/SCADA controller, HMI touch panel, communication gateway (Modbus/IEC 61850/IEC 104), and auxiliary power distribution.

Key Specifications

ControllerPLC (Siemens / Beckhoff / Codesys)
HMI10" or 15" industrial touch panel
ProtocolsModbus RTU/TCP, IEC 61850, IEC 104, DNP3
EnclosureIP54, NEMA 3R, powder coated steel
Power Supply230V AC / 24V DC
StandardsIEC 61439-1, IEC 62271-200

Features

  • Integrated PLC + HMI touch panel (10" / 15")
  • Multi-protocol gateway: Modbus TCP/RTU, IEC 61850, IEC 104, DNP3
  • Auxiliary power distribution: 24V DC, 230V AC
  • Environmental monitoring: temperature, humidity, smoke
  • IP54 rated NEMA enclosure
Containerized BESSUtility-Scale Energy StorageMicrogrid ControlVirtual Power Plant (VPP)
Battery Rack Assembly for 20ft/40ft ESS Container

Battery Rack Assembly for 20ft/40ft ESS Container

Pre-fabricated steel battery rack assemblies for 20ft and 40ft energy storage containers. Modular design supports 8-12 battery modules per rack, integrated busbar mounting rails, and cable management channels.

Key Specifications

MaterialQ235B / Q345B structural steel
Capacity8-12 modules per rack
FinishHot-dip galvanized / Powder coated (RAL 7035)
Container Fit20ft / 40ft ISO container
Load Capacity> 2000 kg per rack
StandardsISO 1496, CSC, seismic zone 4

Features

  • Modular bolt-together design
  • Supports 8-12 battery modules per rack
  • Integrated busbar mounting rails
  • Built-in cable management channels
  • Hot-dip galvanized or powder coated finish
Containerized BESSUtility-Scale Battery StorageData Center UPS RacksIndustrial Battery Systems
Liquid Cooling System for ESS Battery Thermal Management

Liquid Cooling System for ESS Battery Thermal Management

Integrated liquid cooling solution for battery energy storage thermal management. Includes chiller unit (3-40kW cooling capacity), coolant distribution unit (CDU), cold plates, piping manifolds, and glycol-based coolant. Maintains battery cells at optimal 25±3°C.

Key Specifications

Cooling Capacity3kW, 8kW, 15kW, 25kW, 40kW
Temperature Accuracy±0.5°C
Coolant25% Propylene Glycol + Water
Supply Voltage380-480V AC 3-Phase
CommunicationRS485 Modbus RTU
Noise Level< 65 dB(A) at 1m

Features

  • Cooling capacity: 3kW-40kW per unit
  • Temperature control accuracy: ±0.5°C
  • Battery cell target: 25±3°C
  • Glycol-water coolant (non-conductive)
  • Variable speed compressor for energy efficiency
Containerized BESSUtility-Scale StorageHigh-Power EV Charging HubsData Center Battery Rooms
Aerosol Fire Suppression System for ESS Containers

Aerosol Fire Suppression System for ESS Containers

Automatic condensed aerosol fire suppression system designed for energy storage containers and battery rooms. NFPA 2010 compliant, non-conductive agent, zero ozone depletion. Integrated smoke/heat detection with 24/7 monitoring and automatic discharge.

Key Specifications

Agent TypeCondensed Aerosol (K-type / S-type)
Discharge Time< 10 seconds
Coverage1-10 m³ per aerosol unit
DetectionSmoke, heat, CO, VOC sensors
Operating Temp-40°C to +85°C
Service Life10 years (no maintenance)

Features

  • Condensed aerosol agent (K-type, S-type)
  • NFPA 2010 and UL 2775 compliant
  • Non-conductive, non-corrosive agent
  • Zero ozone depletion potential (ODP=0)
  • Integrated smoke + heat + gas detection
Containerized BESSBattery Storage RoomsEV Charging StationsUPS Battery RoomsData Center Power Rooms

Frequently Asked Questions

What is included in ESS Balance of System (BOS)?
ESS BOS includes all auxiliary components needed for a complete energy storage system beyond the battery cells: DC fuses (1500V), EMS control cabinets, battery rack assemblies, liquid cooling systems, and fire suppression systems. We supply these components as a single-source package for containerized and utility-scale ESS projects.
Can you provide a complete BOS package for a 20ft/40ft ESS container?
Yes. We provide turnkey BOS packages including battery racks (8-12 modules per rack), liquid cooling (3-40kW capacity), aerosol fire suppression (NFPA 2010), DC fuse protection (1500V), and EMS control cabinet. All components are pre-engineered for 20ft and 40ft ISO container integration.
Where is PowerConnect Technologies located?
Our headquarters and 25,000 m² manufacturing facility is located in Shenzhen, Guangdong, China (No. 88, Xingye Road, Bao'an District). We have 12 automated production lines, 500+ employees, and export to 30+ countries worldwide. Visit our Factory Tour page for a virtual walkthrough.
What quality certifications does your factory hold?
We hold ISO 9001:2015, IATF 16949:2016, ISO 14001:2015, and our products are certified to UL, TUV, CE, RoHS, and REACH standards. We implement a 5-stage quality control process from incoming material inspection to final outgoing QC with 100% testing. See our Quality Control page for details.
How do I request a quote or sample?
You can request a quote through our Contact page, by clicking the 'Request Quote' button on any product page, or by contacting us via WhatsApp (+86-755-8888-6666) or email (sales@powerconnect-tech.com). We respond to all inquiries within 24 hours.

Need a Custom ESS BOS Solution?

Tell us your project specifications — container size, battery configuration, thermal requirements, and safety standards. We'll provide a complete BOS package quotation within 48 hours.