Home Battery ESS Energy Storage System 125kW/261kWh Liquid-Cooled Outdoor ESS for C&I Solar Battery Backup

125kW/261kWh Liquid-Cooled Outdoor ESS for C&I Solar Battery Backup

High-density LFP battery with 8000 cycles, Utilizes 314Ah high-consistency lithium iron phosphate (LiFePO₄) cells to ensure stable, safe operation at high voltage

125kW inverter, 261kWh capacity, 0.5C rate

Liquid-cooled with real-time temperature control

Features IP65 (battery compartment) and IP54 (electrical compartment) dual ingress ratings, integrated with multi-tier thermal isolation design and a 3-tier fire suppression system (Perfluorohexanone + Aerosol + Water) to effectively prevent thermal runaway propagation

Compact 1.3㎡ footprint with low noise ≤75dB

Integrates a high-precision Battery Management System (BMS), Energy Management System (EMS), and bidirectional Power Conversion System (PCS) via Modbus TCP/RTU for seamless grid-tied operation, remote EMS dispatch, and reliable off-grid backup power

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An all-in-one energy storage cabinet purpose-built for commercial and industrial (C&I) use, integrating a 125kW power conversion system (PCS), a 261kWh lithium iron phosphate (LFP) battery pack, and an advanced liquid-cooled thermal management system.

DC Side Parameters

Battery Type

LFP

Operating Voltage Range

650V ～949V

Conﬁguration

1P260S

Cooling Method

Liquid cooling

Rated Capacity

314Ah

Coolant

Ethylene glycol solution (50% v)

Rated Energy

261kWh

Cycle Life

8000 cycles

Rated Voltage

832V

Fire Protection System

Perﬂuorohexanone + Aerosol +
Water ﬁre suppression

Rated Power

125kW

Detector Type

Temperature, smoke, CO

Rated Charge/Discharge C-rate

0.5P

AC Side Parameters

Rated AC Power

125kW

AC Overload Capability

137.5kW

Wiring Method

Three-phase, four-wire

Allowed Grid Voltage

380V/400V（-15%～＋15%）

Allowed Grid Frequency

50Hz/60Hz±2.5Hz

Total Harmonic Distortion (THD)

≤ 3% (at full load)

Power Factor

-0.99/-1~1

DC Component in Current

≤0.5%

Charge/Discharge Conversion Time

＜100ms

Maximum Conversion Eﬃciency

≥98％

System Parameters

System Round-Trip Efficiency (RTE)

88% ～ 90% (AC-to-AC complete system efficiency)

Operating Environment

-20°C to 50°C (de-rated operation above 45°C)

Noise Level

≤75dB

Dimensions (WDH mm)

1000*1300*2500

Weight

~2.6 tons

Water Resistance Rating

Battery compartment: IP65, Electrical compartment: IP54

Allowed Relative Humidity

0-95% (non-condensing)

Maximum Altitude

≤ 2000m (de-rating above 2000m)

Communication Interface

CAN，Ethernet

Communication Protocol

ModbusTCP/RTU

System Operation Mode

Peakshaving, demand control, reactive power adjustment,
grid scheduling interface,Remote dispatch, local data storage, anti-backﬂow feature

Certiﬁcation Standards GB/T36276-2018

Q : 1. What is this ESS solution designed for? A : This system is purpose-built for commercial and industrial facilities, primarily used for peak shaving to reduce demand charges, storing excess commercial solar generation to improve renewable energy utilization, and serving as emergency backup power or forming microgrids during grid outages.
Q : 2. How does the liquid cooling system help? A : It provides stable thermal control, better safety, higher energy density, and longer battery life in compact space.
Q : 3. What are the key battery specifications? A : It uses 832V LFP battery packs with 314Ah capacity and supports 650–949V operating range with 8000 cycle life.
Q : 4. Can it be integrated with solar and grid systems? A : Yes, it supports PV input, grid tie-in, remote dispatch, anti-backflow control, and seamless backup during outages.
Q : 5. Is the system easy to monitor and maintain? A : It features 24/7 cloud monitoring, edge control, remote upgrades, and local operation via an integrated control screen.
Q : 6. What certifications and safety systems are included? A : Compliant with GB/T36276-2018, it includes temperature/smoke/CO detection, water suppression, and multiple fire protection layers.

125kW/261kWh Liquid-Cooled Outdoor ESS For C&I Solar Battery Backup