sales@gsl-energy.com 
0086 13923720280
UL9540A Certified 125kW/261kWh All-in-One Liquid Cooled Energy Storage System for C&I Applications
GSL Energy GSL-CESS-125K261 is a next-generation 125kW/261kWh all-in-one liquid-cooled energy storage system designed for commercial and industrial (C&I) energy management applications. By integrating high-voltage LiFePO₄ battery modules, PCS, EMS, BMS, liquid cooling system, and fire safety components into a compact outdoor cabinet, the system significantly simplifies installation, commissioning, and operation.
Built with an 832V high-voltage LFP battery architecture, the system delivers 10000-cycle long service life, up to 98.6% PCS efficiency, IP54 outdoor protection, and a wide operating temperature range from -30℃ to +60℃. It supports peak shaving, load shifting, solar energy integration, microgrid operation, backup power, and EV charging infrastructure.
With a compact footprint of only 1.6m², GSL-CESS-125K261 provides flexible deployment for factories, farms, commercial buildings, charging stations, and distributed energy projects. Multiple units can be connected in parallel, supporting expansion from hundreds of kWh to multi-MWh energy storage systems, with up to 24 units connected in parallel for a maximum capacity of 6.26MWh.
GSL-CESS-125K261 is a UL-certified 125kW/261kWh all-in-one liquid-cooled Battery Energy Storage System (BESS) designed for commercial and industrial energy storage applications. Developed for the demanding requirements of North American and global C&I markets, the system integrates a high-voltage LiFePO₄ battery system, bidirectional PCS, intelligent EMS, BMS, liquid cooling technology, and multiple safety protection functions into a single compact cabinet.
Certified with UL9540, UL9540A, and UL1973, GSL-CESS-125K261 meets stringent energy storage safety standards required for professional deployment. With a combination of high safety performance, excellent efficiency, long service life, and flexible scalability, the system provides a reliable energy solution for factories, commercial facilities, solar-plus-storage projects, EV charging stations, microgrids, and backup power applications.
| Item | Specification |
|---|---|
| Model | GSL-CESS-125K261 (US) |
| System Type | All-in-One Liquid Cooled ESS |
| Rated Power | 125kW |
| Battery Capacity | 261kWh |
| Battery Chemistry | LiFePO₄ |
| Battery Voltage | 832V |
| Cycle Life | ≥10,000 Cycles |
| PCS Efficiency | Up to 98.6% |
| Protection Rating | IP54 |
| Operating Temperature | -30℃ ~ +60℃ |
| Footprint | 1.6m² |
| Parallel Expansion | Up to 24 Units |
| Maximum Capacity | 6.26MWh |
| Certifications | UL9540 / UL9540A / UL1973 / CE |
Integrated Design for Faster Deployment and Easier Maintenance
By combining battery system, PCS, EMS, BMS, and thermal management into one cabinet, GSL-CESS-125K261 reduces system complexity and simplifies installation, commissioning, and maintenance.
With a compact footprint of only 1.6 m², the system is ideal for commercial and industrial sites with limited space. The modular design supports flexible capacity expansion from hundreds of kWh to multi-MWh energy storage systems, enabling customers to scale according to future energy requirements.
Advanced Liquid Cooling Technology for Reliable Operation
GSL-CESS-125K261 adopts an advanced liquid cooling system to maintain optimal battery temperature and improve system reliability. Compared with traditional air cooling solutions, liquid cooling provides more uniform temperature control, reduces battery degradation, and extends system lifespan.
Supporting a wide operating temperature range of -30℃ to +60℃, the system is suitable for various environments including industrial facilities, outdoor energy projects, and extreme climate regions.
High-Performance Battery System with Intelligent Energy Management
Equipped with a high-voltage 832V LiFePO₄ battery system, GSL-CESS-125K261 provides excellent safety, high efficiency, and long service life with up to 10,000 cycles.
The integrated EMS enables intelligent energy scheduling for peak shaving, demand charge management, solar self-consumption optimization, microgrid operation, and backup power applications. The PCS supports up to 98.6% efficiency, MPPT photovoltaic connection, and fast grid/off-grid switching through STS.
Flexible Expansion for Commercial and Industrial Applications
GSL-CESS-125K261 provides 125kW rated power and 261kWh energy capacity per unit. Up to 24 units can be connected in parallel, achieving a maximum capacity of approximately 6.26MWh.
The scalable architecture makes it suitable for a wide range of applications, including manufacturing facilities, commercial buildings, EV charging stations, renewable energy projects, and industrial microgrids.
Faqs
304 food contact grade stainless steel, one-piece molding, wear-resistant and easy to wash,
multi-layer process wire drawing and polishing, dishwasher safe and easy to clean.
Email: sales@gsl-energy.com
Tel: +86 755 84515360
Address: A602, Tianan Cyber Park, Huangge North Road, Longgang District, Shenzhen, China0086 13923720280