​As a global manufacturer of BESS containers, TLS Energy specializes in the design, fabrication, and testing of containerized Battery Energy Storage Systems (BESS) tailored to customer requirements.

Among all quality assurance procedures, the water spray test is one of the most critical steps, ensuring that each BESS container achieves IP55 waterproof protection for long-term and reliable outdoor operation.

Why Water Spray Testing Is Essential
BESS containers are typically installed outdoors, exposed to rain, humidity, wind, and temperature changes. The water spray test verifies that every container enclosure provides full protection against water ingress, keeping the internal electrical and control components safe.

Without proper water resistance, moisture could lead to corrosion, insulation breakdown, or short circuits, which may affect performance and safety. Therefore, TLS Energy conducts water spray testing on every unit before delivery to ensure consistent sealing quality and reliability.

TLS Energy’s In-House Water Spray Test Procedure
TLS Energy has developed its own in-house testing procedure specifically for large-scale BESS containers. This process simulates real rainfall and strong water jet conditions to confirm the integrity of the container’s waterproof design.
The testing process includes:
  1. Pre-Inspection – All door gaskets, hinges, air filters, and sealing strips are checked to ensure proper installation and condition.
  2. Spray Simulation – High-pressure nozzles spray water over the roof, side panels, doors, and cable entry points from multiple directions and for a set duration, reproducing real outdoor rainfall conditions.
  3. Post-Test Inspection – After spraying, the container is opened and carefully inspected. No water droplets or damp areas are acceptable inside any compartment.
  4. Documentation – A Water Spray Test Report is issued for each tested unit, including test pressure, duration, and results, signed by TLS Energy’s quality assurance engineers.

Components Protected Inside the BESS Container
TLS Energy’s BESS containers integrate all key energy storage and control systems within a single IP55-rated enclosure, including:
  • Battery packs and racks – energy storage modules providing core capacity
  • BMS (Battery Management System) – monitors and balances battery operation
  • FFS (Fire-Fighting System) – enables rapid fire detection and suppression
  • DC Control Cabinet – manages electrical distribution and safety circuits
  • TMS (Thermal Management System) – maintains stable temperature inside the container

The water spray test ensures all these systems remain fully protected and operational even under heavy rain and severe weather.

Engineered for Long-Term Durability
TLS Energy’s container structure adopts a multi-layer waterproof design, featuring EPDM rubber seals, stainless-steel hardware, IP-rated glands, and anti-corrosion coatings.
Together with precise manufacturing and strict testing, this design guarantees reliable IP55 protection and outstanding performance in all environmental conditions.

Commitment to Quality and Safety
At TLS Energy, quality and safety always come first. Every BESS container undergoes a full factory acceptance test (FAT), including electrical insulation checks, thermal system verification, fire-safety validation, and water spray testing.

This commitment ensures that every TLS Energy product delivered to clients meets the highest standards of reliability, durability, and performance in real-world energy storage applications.

​In today's interconnected world, the integrity of temperature-sensitive cargo is non-negotiable. It's why TLS reefer containers are not just simple cooled boxes—they are precision-engineered links critical to a reliable global cold chain.
 
By integrating advanced technology and a commitment to sustainability, TLS is setting a new standard for refrigerated shipping containers, ensuring your high-value goods—from pharmaceuticals and fresh produce to sensitive high-tech components—arrive exactly as they should.
 
Precision Temperature Control: The Cold Chain's Security Layer
For perishable goods, a minor temperature shift can mean total product loss, a safety hazard, or failure to meet regulatory standards. TLS eliminates this risk through exceptional temperature stability.
  • Tight Range: Our refrigerated containers maintain conditions between a wide spectrum of -25℃ and +25℃.
  • Minimal Deviation: Precision control ensures deviation is no more than ±0.5℃, a level of accuracy demanded by the most stringent industries.
  • Regulatory Compliance: This level of control is essential for meeting key industry standards, including Good Distribution Practice for pharmaceutical logistics and HACCP certification for food shipments.
 
Engineering Excellence: Built for Global Trade
The superior performance and reliability of TLS reefer containers are the result of deliberate, advanced engineering designed to endure the most demanding global logistics environments.
  • Best-in-Class Insulation: We utilize high-quality polyurethane (PU) foam with a density of 40kg/m³. This material provides best-in-class thermal defense, minimizing heat transfer and stabilizing the internal climate.
  • Optimal Thickness: Our standard marine containers feature robust wall thicknesses ranging from 50 to 120mm for optimal thermal performance.
  • Unmatched Durability: Constructed with high-strength steel and precision welding, our durable refrigerated containers are built to withstand severe conditions, including heavy impacts, ship vibrations, and immense stacking pressure at ports.
 
The Smart Cold Chain: IoT and Real-Time Visibility
TLS is future-proofing your supply chain with integrated smart reefer technology. We leverage the Internet of Things (IoT) and data analytics to give you unprecedented oversight.
  • Real-Time Monitoring: Gain complete visibility with real-time tracking of critical factors, including temperature, humidity, and operational status.
  • Data-Driven Control: This technology allows for immediate intervention and verification at every stage of the journey, giving you complete control and peace of mind over your valuable cargo.
 
Shaping the Future: Sustainable and Efficient Logistics
At TLS, innovation extends beyond performance into environmental stewardship. We are committed to building a sustainable cold chain for tomorrow.
  • Eco-Friendly Refrigerants: We are actively adopting sustainable refrigerants like CO2 and NH3 to significantly reduce our environmental footprint and promote green logistics.
  • Energy Efficiency: Through innovations like modular designs and advanced heat recovery systems, we boost energy efficiency, which translates directly into lower operational costs and reduced environmental impact.
  • Advanced Automation: Automated systems for loading, unloading, and monitoring minimize the potential for human error and dramatically increase both operational safety and speed.
 
Secure Your Supply Chain with TLS. By choosing TLS, you are partnering with a leader dedicated to providing the most secure, efficient, and sustainable cold chain solutions on the market.
 
Ready to protect your valuable cargo and elevate your global trade operations?
 
TLS Offshore Containers / TLS Energy is a global supplier of standard and customised containerised solutions. 
Wherever you are in the world, TLS can help you, please contact us.
 
Any more information regarding Offshore Reefer container, ISO reefer container, please download TLS offshore reefer containers brochure for your reference
 
 
Keywords: #Reefer Containers, #Cold Chain Logistics, #Refrigerated Shipping Container Services, #Pharmaceutical Reefer Transport, #Smart Monitoring System, #Temperature Controlled Shipping, #Sustainable Reefer Container Technology, #High-Strength Reefer Insulation, #Refrigerated Containers

Written by Oliver

In energy, oil & gas, renewable energy, and research projects, pressurized explosion-proof containers often need to operate in harsh environments—deserts exceeding 50°C, polar regions with extreme cold, dusty mining areas, and offshore high-humidity locations.

These extreme conditions challenge every aspect of the design. Drawing on years of engineering experience, TLS has developed solutions that ensure stable operation under all conditions, focusing on ventilation, corrosion protection, insulation, electrical systems, and intelligent monitoring.

1. High-Temperature Environments: Smart Airflow Keeps Internal Temperatures Safe

In desert regions above 50°C, electrical components are prone to overheating.

TLS uses a combined system of fans, exhaust vents, and ducted air conditioning for efficient internal airflow.

Intelligent temperature control modules monitor conditions in real time, automatically adjusting airflow or AC operation to keep internal temperatures within a safe range.

2. Low-Temperature Environments: Freeze Protection and Insulation

In extremely cold regions, materials become brittle and equipment can be difficult to start.

TLS containers feature multi-layer insulation—rock wool, aluminum foil layers, and internal panels—that prevents heat loss and condensation.

Optional electric heating systems ensure that electrical components operate reliably even at -40°C.

3. Marine Environments: Salt and Corrosion Resistance

High humidity and salt spray offshore are tough on metal structures and electrical systems.

TLS applies a C5-M corrosion protection coating system—primer, epoxy intermediate layer, and polyurethane topcoat—for multi-layer defense.

Fasteners can be made of 316L stainless steel, with welds and corners specially protected to prevent salt corrosion.

4. Dust Protection Design: Keeping Air Flowing, Dust Away

In mining sites or desert projects where sandstorms are frequent, TLS adopts a three-layer protection design — reinforced sealing strips, airlock double doors, and optimized airflow pathways — to effectively reduce the impact of dust on internal equipment and space.

Under typical dusty conditions, these measures help maintain a clean and stable interior environment. For harsher conditions, TLS can provide optional upgrades such as high-efficiency filters, positive pressure ventilation systems, and regular maintenance plans to further enhance protection.
Note: The dust protection design significantly reduces dust accumulation but cannot fully prevent it under extreme sandstorm conditions. Actual performance may vary depending on site environment and maintenance.

5. Electrical and Intelligent Systems: Reliable and Visible

All electrical components are industrial-grade, wide-temperature units with surge, short-circuit, and grounding protection for stable operation.

Optional smart monitoring systems track temperature, humidity, and fan status in real time, automatically alerting operators if abnormalities occur.

6. Conclusion

Reliability in extreme climates is never accidental.

Through structural reinforcement, protective coatings, temperature control, and intelligent systems, TLS ensures every pressurized explosion-proof box can withstand time and environmental challenges.
Whether in deserts, offshore, or polar regions, TLS is committed to delivering safe, reliable, and fully customizable explosion-proof container solutions worldwide.

TLS Offshore Containers / TLS Energy is a global supplier of standard and customised containerised solutions. 
Wherever you are in the world, TLS can help you. Please contact us.


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Written by Snowy