SOLAR TODO delivered a containerized Battery Energy Storage (BESS) project in Phnom Penh, Cambodia (sea) to stabilize solar self-consumption and absorb surplus energy for later use. The deployment was designed around a scalable, standards-driven battery platform with robust safety systems suited for a humid, coastal operating environment.
Answer Capsule: SOLAR TODO commissioned a 2000kWh / 1000kW containerized LFP BESS in Phnom Penh, using forced-air cooling, water mist fire suppression, and UL/NFPA-aligned controls for reliable daily cycling.
Project Overview: Containerized BESS for Phnom Penh’s Daily Surplus
Phnom Penh’s coastal conditions—high humidity, salt-laden air, and frequent weather-driven variability—create operational pressure on energy infrastructure. For industrial users integrating solar self-consumption, the challenge is not only generating energy, but also managing when that energy is available relative to demand.
SOLAR TODO’s solution was a purpose-built industrial BESS: 2000kWh / 1000kW using 2× 20ft containers, each housing LFP battery modules with a high cycle life and a safety architecture designed for continuous, repeatable operation. The system supports solar-coupled self-consumption with surplus storage, targeting 1 cycle per day at an 85% depth of use—a duty profile that benefits from the system’s long-life design and predictable degradation.
The BESS was delivered with a complete power-conversion chain—PCS inverter + step-up transformer—and a control layer that enables three operational modes: peak-shaving, backup power, and solar-coupled self-consumption. For Phnom Penh, the project’s primary focus was the solar-coupled mode: storing surplus during high production windows and releasing energy later to reduce net import and improve load matching.
Why This Infrastructure Needed a Containerized LFP BESS
In Phnom Penh’s industrial zones, grid conditions and demand profiles can be variable, and the operational window for solar generation can shift with local weather patterns. Without energy storage, surplus energy often cannot be fully utilized when it is produced, leading to curtailment or inefficient consumption patterns.
Additionally, battery safety and reliability become more critical in humid, coastal environments where equipment enclosure integrity, cooling performance, and fire suppression effectiveness directly affect uptime. SOLAR TODO approached these risks with a containerized design that integrates BMS + HVAC cooling + fire suppression within a controlled enclosure, minimizing exposure to external environmental stressors.
Finally, industrial stakeholders require systems that can be maintained and expanded without major redesign. With scalability from 100kWh to 10MWh+, the chosen architecture supports future growth—important for facilities in Phnom Penh planning phased expansions.
Product Design: What SOLAR TODO Built for This Deployment
This project used SOLAR TODO’s industrial containerized platform configured as a 2000kWh / 1000kW system with 2× 20ft containers. The battery chemistry selection and thermal management strategy were chosen to support the project’s daily cycling needs while maintaining safety performance.
Battery & Safety Architecture (LFP, BMS, Cooling, Fire Suppression)
- Battery chemistry: LFP (Lithium Iron Phosphate) modules, selected for long cycle life and robust thermal characteristics.
- Round-trip efficiency & usage profile: The configured system targets 95% round-trip efficiency with 90% DoD capability. For Phnom Penh’s duty cycle, operation was set to 1 cycle/day at 85% depth to align with surplus storage behavior.
- Cycle life & degradation: The system is specified for 8000 cycle life, with 2.5%/yr degradation and a 15-year warranty for long-term operational planning.
- BMS & thermal control: A BMS + forced air cooling package actively manages module temperatures to maintain performance across daily ambient swings common in a sea-adjacent climate.
- Fire suppression: Water mist fire suppression was integrated to address battery enclosure fire safety requirements.
Power Conversion: PCS Inverter + Step-Up Transformer
To deliver stable energy exchange with the facility electrical system, SOLAR TODO installed PCS inverter + step-up transformer within the containerized solution. This configuration supports conversion and voltage adaptation required for grid-coupled operation and solar-coupled self-consumption.
Operational Modes for Industrial Flexibility
The system was commissioned to support three operating modes:
- Peak-shaving (reduce demand peaks)
- Backup power (provide resilience during grid disturbances)
- Solar-coupled self-consumption (store surplus and dispatch later)
For Phnom Penh, the dominant value driver was the third mode—storing surplus energy produced during higher solar windows and using it later to improve self-consumption and reduce reliance on imports.
Standards Alignment: IEC, UL, and NFPA
SOLAR TODO designed and verified the deployment against relevant international and fire safety standards:
- IEC 62619 (secondary lithium cells and batteries for industrial applications)
- UL 9540 (energy storage systems and related equipment)
- NFPA 855 (installation of stationary energy storage systems)
These standards guided engineering decisions around safety, control behavior, and installation practices suitable for industrial environments.
Technical Specifications
- System type: Containerized Battery Energy Storage (BESS)
- Installed capacity: 2000kWh
- Power rating: 1000kW
- Containers: 2× 20ft containerized units
- Battery chemistry: LFP (Lithium Iron Phosphate)
- Round-trip efficiency: 95%
- Depth of discharge capability: 90% DoD
- Cycle life: 8000 cycles
- Degradation: 2.5%/yr
- Warranty: 15-year warranty
- BMS: Integrated battery management system
- Cooling: Forced air cooling
- Fire suppression: Water mist fire suppression
- Power electronics: PCS inverter + step-up transformer
- Use case configuration: Solar self-consumption + surplus storage, 1 cycle/day, 85% depth
- Standards: IEC 62619, UL 9540, NFPA 855
Deployment in Phnom Penh: Integration Approach and Local Considerations
SOLAR TODO’s execution in Phnom Penh focused on ensuring the BESS could operate reliably in a coastal, humid climate while meeting industrial uptime expectations.
1) Containerized installation for predictable commissioning
Using 2× 20ft containers reduced site complexity by bringing battery modules, BMS, cooling, PCS, transformer, and fire suppression into a factory-integrated envelope. This approach supports faster installation and standardized commissioning steps—critical when industrial sites have limited downtime windows.
2) Thermal management for humid coastal conditions
In Phnom Penh (sea), high humidity can affect heat dissipation and enclosure performance. The project’s forced air cooling strategy was selected to maintain operating temperatures within safe and efficient ranges, supporting stable output during daily cycling.
3) Fire safety aligned with NFPA 855 expectations
Battery safety in stationary systems depends on both detection and suppression. By integrating water mist fire suppression and aligning the design with NFPA 855 and UL 9540, the system was engineered for the specific risk profile of stationary storage installations.
4) Power conversion and dispatch for solar surplus
The PCS inverter + step-up transformer combination enabled effective dispatch of stored energy to support solar self-consumption. The control strategy was configured so the facility could absorb surplus energy when available and release it later, following the 1 cycle/day operation target at 85% depth.
Results and Impact
After commissioning, the Phnom Penh industrial site benefited from a storage system engineered for daily surplus capture and reliable dispatch.
Key outcomes included:
- Operational alignment with duty cycle: The system was configured for 1 cycle/day at 85% depth, matching the solar surplus storage requirement without pushing beyond the intended usage envelope.
- High energy efficiency for daily cycling: With 95% round-trip efficiency, the BESS preserved a large portion of stored energy for later use.
- Long service horizon for industrial planning: The 8000 cycle life and 15-year warranty support long-term operations with predictable replacement planning.
- Safety-focused enclosure design: Integration of BMS + forced air cooling + water mist fire suppression supports risk-managed operation in a demanding humid, sea-adjacent climate.
Frequently Asked Questions
Q1: What battery chemistry is used in the Phnom Penh BESS project?
The system uses LFP (Lithium Iron Phosphate) battery modules, designed for industrial stationary energy storage with 8000 cycle life and 15-year warranty.
Q2: How is the BESS configured for solar self-consumption?
The project was configured for solar self-consumption + surplus storage, operating at 1 cycle per day with 85% depth, supported by PCS inverter + step-up transformer for controlled dispatch.
Q3: What cooling and fire suppression systems are included?
SOLAR TODO deployed BMS + forced air cooling and water mist fire suppression integrated into the containerized BESS design.
Q4: Which compliance standards were used for this installation?
The deployment aligns with IEC 62619, UL 9540, and NFPA 855 for battery safety, energy storage system requirements, and stationary installation guidance.
Conclusion
SOLAR TODO’s Battery Energy Storage (BESS) project in Phnom Penh demonstrates how a containerized, standards-aligned LFP system can improve industrial energy flexibility. By combining 2000kWh / 1000kW capacity in 2× 20ft containers, 95% round-trip efficiency, 8000 cycle life, and a safety stack of forced air cooling + water mist fire suppression under IEC 62619 / UL 9540 / NFPA 855, the installation was tailored for daily solar surplus storage and dependable operation in a humid coastal environment.
For teams evaluating industrial storage deployments, this project also highlights the value of a scalable architecture and rigorous compliance practices—especially where environmental conditions and uptime requirements demand engineered resilience.
Learn more about SOLAR TODO’s energy storage platform at product page or contact our team at contact us.
References
- IEC 62619: Secondary lithium cells and batteries for industrial applications
- UL 9540: Energy storage systems and equipment
- NFPA 855: Standard for the installation of stationary energy storage systems
- NREL: Grid integration and performance considerations for energy storage technologies
- IRENA: Battery storage and renewable integration insights for system planning
Equipment Deployed
- Industrial containerized BESS (2× 20ft): 2000kWh / 1000kW LFP battery system with BMS, forced air cooling, and water mist fire suppression (IEC 62619, UL 9540, NFPA 855)
- PCS inverter and step-up transformer integrated into each container for controlled dispatch in solar-coupled self-consumption mode
- Fire safety and control subsystems integrated with the BMS, HVAC cooling, and water mist fire suppression for stationary energy storage compliance