261kWh 125kW Liquid Cooling Commercial Energy Storage System for C&I Projects

261kWh 125kW Liquid Cooling C&I Battery Energy Storage System

The 261kWh C&I BESS with 125kW PCS and Liquid Cooling is designed for commercial and industrial energy storage projects where both site power demand and required battery energy need to be considered during system sizing.

The system combines 261kWh of nominal LiFePO4 battery energy with a 125kW rated PCS. The battery uses a 314Ah, 832V architecture with a specified operating voltage range of 702–936V and maximum charging and discharging current of 157A.

261kWh / 125kW Is a Power-and-Energy Sizing Decision

A BESS should not be selected only by comparing battery capacities in kWh.

The 261kWh rating describes the amount of nominal battery energy available, while the 125kW PCS rating describes the rated AC power conversion capability of the system.

For project sizing, these two values need to be evaluated together against the site's actual load curve.

Why Does This Model Move Up to a 125kW PCS?

Within this product series, the 215kWh and 233kWh configurations use a 105kW rated PCS, while the 261kWh configuration increases rated PCS output to 125kW.

This means the 261kWh version is not simply a higher-capacity alternative designed only to extend discharge time. It also provides a higher rated power level.

For a site where 105kW of PCS capacity does not provide enough power for the target operating strategy, the 125kW configuration can be evaluated as the next system size.

When Should PCS Power Be the Main Selection Factor?

In some C&I projects, battery capacity is not the first limitation. The required discharge power can determine whether a 105kW or 125kW PCS is more appropriate.

What Does the 2.09-Hour Energy-to-Power Ratio Tell You?

The nominal 261kWh battery capacity can be divided by different discharge power levels to understand the basic relationship between power and operating duration.

These are theoretical calculations based on nominal battery energy. Actual operating duration depends on usable SOC range, conversion losses, system settings and the real site load profile.

261kWh Does Not Mean the System Must Discharge at 125kW

The 125kW figure represents rated PCS output. The actual operating power can vary according to the site's control strategy and energy requirement.

For example, a project may use a lower discharge power for a longer period rather than continuously operating at the full rated PCS power.

832V High-Voltage LiFePO4 Battery Platform

The battery system uses LiFePO4 chemistry with a nominal capacity of 314Ah and nominal voltage of 832V.

The specified operating voltage range is 702V to 936V. Maximum charging current and maximum discharging current are both listed at 157A.

These electrical parameters should be evaluated together with the PCS and DC-side system architecture during project engineering.

Liquid Cooling for C&I Battery Thermal Management

The supplied specification identifies liquid cooling as the battery thermal management method.

For commercial energy storage applications with repeated charging and discharging, the cooling system forms part of maintaining suitable battery operating conditions.

The specified operating temperature range is -20°C to +60°C and the storage temperature range is -30°C to +45°C.

125kW PCS Electrical Parameters

The PCS is rated at 125kW output power with a maximum AC current of 216A.

Rated AC voltage is 230/400V and the specified grid frequency is 50/60Hz. THDi is listed at less than 3%.

Final AC connection, conductor sizing, protective devices and grid interface design should be determined according to the actual project and local electrical requirements.

Core Technical Specifications

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Site Engineering for a 2.4-Ton Energy Storage System

The system measures 1400 × 1000 × 2399mm and has an approximate net weight of 2400kg.

Project planning should therefore consider equipment transportation, access route, installation area, supporting structure or foundation and maintenance clearance before delivery.

The supplied specification lists IP54 protection, 5%–95% relative humidity and an operating altitude of up to 2000m.

Do You Need More Energy or More PCS Power?

This question is important when comparing different C&I BESS configurations.

If the site's target discharge power remains within a lower PCS range but more operating time is required, increasing battery energy may be the main priority.

If the site needs a higher instantaneous discharge power as well as more stored energy, the 125kW / 261kWh configuration may be more relevant.

What Project Data Should Be Collected Before BESS Sizing?

For commercial and industrial storage, a project quotation is more useful when it is based on real site data rather than only a requested battery capacity.

Frequently Asked Questions