About Battery energy storage system container, BESS container / enclosure

BESS (Battery Energy Storage System) is an advanced energy storage solution that utilizes rechargeable batteries to store and release electricity as needed. It plays a crucial role in stabilizing power grids, supporting renewable energy sources like solar and wind, and providing backup power during outages. BESS helps balance energy supply and demand, improving efficiency and reducing reliance on fossil fuels. It enhances grid reliability, enables peak shaving, and lowers electricity costs by storing excess energy for later use. With advancements in lithium-ion and LFP battery technologies, BESS is becoming an essential component of modern energy infrastructure and sustainability efforts
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Advanced Functionalities of TLS Energy’s Battery Energy Storage System (BESS) Containers
​1. Ramp Rate Control / Power Smoothing: BESS effectively manages the rate of power output changes, ensuring a smooth transition and reducing the impact on the grid.
2. Energy Shifting: It allows for storing energy during low-demand periods and using it during high-demand times, optimizing energy usage.
3. Customizable Power Profiles / Schedules: Users can set specific power output schedules to meet varying energy demands efficiently.
4. Grid Voltage Control: BESS plays a crucial role in maintaining stable grid voltage levels, essential for grid reliability.
5. Power Frequency Response (PFR) / P(f): This feature aids in maintaining a consistent power frequency, crucial for grid stability.
6. Peak Load Shaving: BESS helps in reducing the load on the grid during peak times, enhancing overall efficiency.
7. Reverse Power Protection: It prevents the flow of power in the reverse direction, safeguarding the grid and equipment.
8. Active Power Reserve (APR): Provides backup power to support the grid in times of sudden demand spikes or supply shortfalls.
9. Enhanced Frequency Response (EFR) & Automatic Frequency Restoration Reserve (AFRR) / SRL: These features help in quick response to frequency changes, ensuring grid stability.
10. Frequency Containment Reserve / PRL: BESS aids in maintaining frequency within prescribed limits, crucial for grid integrity.
​11. Plant Level Inertia: This function contributes to the overall inertia of the power system, enhancing grid resilience.

BESS container product / service TLS offers

We are at the forefront of the global renewable energy storage industry, delivering customized Battery Energy Storage System (BESS) containers / enclosures to meet the growing demand for clean and efficient power solutions. Our versatile product portfolio includes three distinct types of BESS container solutions, each engineered to suit the diverse requirements of our international clients. In addition, we offer complete EPC services for BESS projects, ensuring seamless integration from concept to commissioning.
​1. Container Enclosure Body with Battery Rack
This is our foundation-level BESS solution, designed with flexibility in mind. It features a high-quality container enclosure pre-installed with a battery rack, allowing clients to integrate their own battery packs, cooling systems, fire suppression systems, and other components. This customizable platform is ideal for developers or EPC contractors looking for a cost-effective starting point for a tailored energy storage setup.
2. Semi-Integrated BESS Container Solution
Our semi-integrated solution includes a battery rack along with key auxiliary systems, such as:
    •    Battery cooling system
    •    Fire fighting system
    •    Internal lighting
    •    Earthing system
This configuration provides a ready-to-use base while still allowing flexibility for clients to integrate their preferred brands or technologies for PCS, EMS, or other components. It’s the perfect balance between off-the-shelf convenience and personalized control.
3. Fully Integrated BESS Container Solution
Our fully integrated BESS container is a complete, plug-and-play solution. It comes pre-equipped with all essential and advanced systems, including:
    •    High-performance battery packs
    •    Advanced Battery Management System (BMS)
    •    Integrated DC combiners
    •    Precision cooling systems (HVAC or liquid cooling)
    •    Intelligent fire detection and suppression systems
    •    Interior lighting and auxiliary electrical systems
This turnkey energy storage solution ensures seamless deployment, minimal on-site work, and optimal safety and efficiency for utility-scale or commercial & industrial (C&I) applications.
4. EPC Services for BESS Projects
Beyond product supply, TLS Energy offers full Engineering, Procurement, and Construction (EPC) services for BESS projects. Our comprehensive support covers:
    •    Containerized BESS system design and manufacturing
    •    AC-side integration (PCS, transformers, switchgear)
    •    On-site installation and commissioning
    •    System testing, training, and after-sales service

Please download Energy Storage System (ESS) Containers brochure for reference. 

Typical BESS, OEM & ODM

Basic specifications:

• Battery cell: LFP 280Ah~600Ah
• Energy capacity: 3MWh~7MWh per 20ft ISO container
• Working ratio: 0.25C ~ 1C
• Rated voltage: 1331 V DC (1040 V~ 1500 V range)
• Communication protocol: CAN, Modbus TCP/IP, RS485
• Operating temperature: -30℃…+55 ℃
• Storage temperature: -35℃…+60 ℃
• Cooling method: Liquid cooling / air cooling (according to requirement)
• Max. corrosion  level: C5
• Overall container IP level: IP55
• Operating altitude: ≤4000m 
• Product weight: ~38 tons
• Dimension (W*D*H): 6058mm*2438mm*2896mm (customised)

Main properties:
​1. Lower LCOS & Higher Energy Density

• Maximise ROI: industry-leading Levelised Cost of Storage thanks to high-capacity LFP cells.
• Compact footprint: hand-in-hand / back-to-back layout delivers more kWh per square metre.
• Long-term value: < 4 % cell degradation in year one and a 20-year design life keep replacement costs down.

 
2. Multi-Layer Safety Architecture

• Zero incident record across all ESS deployments worldwide.
• Built for extremes: reliable operation from -40 °C deserts to +55 °C tropics.
• All-level protection: cell → module → rack → container, with redundant sensors and real-time early-warning.
• Stage-specific fire strategy: aerosol suppression, NOVEC™ gas, and water-mist options tailored to each fire phase.

3. Plug-and-Play O&M Efficiency

• Factory-installed DC bus inside a 20-ft ISO cabinet—no site wiring headaches.
• SOC accuracy ± 3 % via advanced algorithms.
• One-click commissioning slashes on-site labour hours.
• PCS-agnostic: fully compatible with leading global PCS brands and future augmentation plans.
• AI cloud platform gives condition-based maintenance and predictive analytics.

4. Electrical & Thermal Safety by Design

• Generous creepage & clearance distances exceed IEC and UL requirements.
• Total thermal isolation prevents heat spread between packs.
• NP pack tech: no fire, no propagation, no explosion—even during nail-penetration or thermal-runaway events.

 
5. High Serviceability & Integration

• Integrated MSD + fast-plug connectors enable swift module swap-outs.
• Dense yet accessible: reserved maintenance passages and lift-out panels speed routine inspections.

 
6. Rugged IP Rating & Airtight Assurance

• IP55+ enclosure guards against dust, salt-spray and torrential rain.
• 100 % helium-leak test before roll-out guarantees airtight integrity for every module.

Typical BESS container / enclosure

Ready to Decarbonise & Digitise Your Grid

Whether you need a bare-frame BESS enclosure /rack, a semi-integrated solution or a fully wired, grid-ready BESS unit, TLS Energy delivers the expertise — from design to EPC hand-over — to make your energy storage project profitable, fast and safe.
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​Contact us today to customise a BESS container that meets your exact capacity, safety and compliance goals.