261kWh All-in-One Liquid-Cooled C&I Energy Storage System

All-in-One Design for Easier Installation

The 261kWh system uses 314Ah LiFePO4 cells and integrates the batteries, PCS, BMS, EMS, liquid cooling, fire protection, and power distribution in a single outdoor cabinet. This reduces the need to install major components separately and connect them on site. Operating status indicators and an emergency stop switch allow personnel to check system status and shut down the system in an emergency. Up to 10 cabinets can operate in parallel, expanding total storage capacity to 2.61MWh for larger projects.

Under 0.5C discharge test conditions, the battery system delivers a cycle life of 8,000 cycles, retaining 70% of its initial capacity after 8,000 charge-discharge cycles. This significantly extends battery replacement intervals and reduces long-term project operating costs.

Cooling and Heating for Year-Round Operation

The liquid cooling system in the 261kWh cabinet removes heat generated during charging and discharging, while heating improves battery startup and operation in cold conditions. The thermal management unit provides 5kW of cooling and 2kW of heating to manage battery temperature during daily cycling.

Battery Monitoring and Fire Protection for Safer Operation

The 261kWh battery system’s BMS monitors cell voltage and temperature, along with battery string voltage, current, and insulation status, in real time. It also provides SOC/SOH estimation, passive balancing, and fault alarms. Audible and visual alarms alert personnel to abnormal conditions, while operating data and fault logs help maintenance teams trace issues and troubleshoot faults.

Fire protection covers both the lithium battery packs and the cabinet. The packs use condensed aerosol fire suppression, while the cabinet uses a perfluorohexanone fire suppression system, with fire detection and automatic extinguishing. The PCS also provides protection against overcurrent, overvoltage, short circuits, surges, islanding, and DC reverse polarity.

Energy Management for Flexible Charging and Discharging

The 261kWh energy storage system includes an EMS that schedules charging and discharging according to the project’s operating strategy. It can charge during low-tariff periods and discharge during high-tariff periods, reduce grid power demand during load peaks, or store surplus daytime solar energy for later use.

For integration with existing monitoring or energy management platforms, the 261kWh system supports IEC 104, Modbus RTU, DL/T 645, and other protocols, with LAN, CAN, and RS485 interfaces. An optional 10.1-inch LCD allows personnel to view operating information and alarm status on site. The PCS also supports off-grid output and can be used for backup power with suitable transfer equipment.

Outdoor Cabinet Design and Maintenance Access

The 261kWh cabinet has an IP54 protection rating and a C3 corrosion protection rating. It measures 1400 × 1000 × 2399mm, including lifting eyes, weighs approximately 2.25 tonnes, and occupies a footprint of approximately 1.4m².

Site layouts must allow at least 1200mm of clearance at the front and 800mm at the rear. Handling arrangements and foundation load capacity must account for the system’s total weight. The modular battery packs are equipped with manual service disconnects (MSDs) for servicing and maintenance.