ESS-GRID FlexiO Series

ESS-GRID FlexiO Series

500 kW 241 kWh IP55

A powerful energy storage solution built for commercial and industrial applications, delivering intelligent energy management, scalable capacity, and reliable power wherever it is needed.

Sustainable living, BSLBATT inside

Power Smarter, Operate Greener with ESS-GRID FlexiO

An air-cooled commercial and industrial battery system designed with a split PCS and battery cabinet architecture for flexible 1+N scalability. Compatible with solar PV, diesel generators, and grid power, it provides stable energy for microgrids, remote areas, manufacturing facilities, farms, and EV charging stations.

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Durable LiFePO4 Technology

Adopts 314Ah LiFePO4 cells with high thermal stability and long cycle life, minimizing thermal runaway risks and ensuring reliable operation in C&I storage.

Flexible Energy Expansion

Each cabinet provides 241 kWh / 768 V capacity and can scale up to 1.2 MWh with five parallel clusters, meeting diverse project requirements with ease.

Intelligent Cooling & Low Noise

Equipped with a 3 kW air-cooling system to maintain ideal operating temperature while keeping noise levels below 78 dB, ensuring quiet and efficient operation.

Outdoor-Ready Protection

Featuring an IP55-rated enclosure and anti-corrosion design, offering dependable performance against dust, rain, and challenging outdoor conditions.

Compact All-in-One Design

Integrates battery modules, BMS, and cooling system within one cabinet (1850×1430×2300 mm, 3310 kg) for faster installation and simplified maintenance.

Smart Power Control

Supports 157 A maximum charge/discharge current with CAN-based BMS communication, enabling accurate monitoring, protection, and efficient power management.

DC-side Expansion for Longer Backup

Add more ESS-GRID 241C battery cabinets (241 kWh each at 768 V) to increase energy storage and extend backup runtime. Multiple cabinets can be combined to provide 2–4 hours of continuous power, ideal for industrial production, data centers, and critical facilities.

ESS-GRID FlexiO DC-side battery cabinet expansion
ESS-GRID FlexiO AC-side system expansion

AC-side Expansion for Higher Power Output

Connect up to 2 FlexiO systems in parallel to scale power from 500 kW to 1 MW with total storage capacity of 3.8 MWh. Perfect for manufacturing plants, EV charging stations, and microgrid applications, delivering reliable energy when it matters most.

Maintenance Made Easy, Productivity Uninterrupted

Damaged or aging battery cabinets can be replaced quickly and effortlessly, minimizing downtime and keeping operations running at full capacity. The modular design enables fast maintenance, ensuring continuous power supply and uninterrupted productivity for critical applications.

 

Components Overview Tab
COMPONENT OVERVIEW

Explore the Design of ESS-GRID FlexiO Series

- High-Energy Storage with ESS-GRID 241C

Equipped with LiFePO4 cells and 241 kWh capacity at 768 V, ensuring high energy density, safety, and long cycle life. Modular architecture enables parallel expansion to MWh-level systems. Designed with IP55 protection and intelligent air-cooling, maintaining stable performance and reliability in outdoor applications.

+ Efficient DC Power Conversion with P500L

Rated at 500 kW, regulating DC power flow between battery and PCS for optimal voltage balance and energy efficiency. Converts variable battery voltage into a stable DC level, improving system performance and protecting key components under dynamic load conditions.

+ Reliable Grid Interaction with P500E

Delivers 500 kW bi-directional conversion between DC and AC for grid or facility connection. Converts DC energy to clean AC output during discharge and recharges batteries during off-peak hours. Supports both on-grid and off-grid operation for flexible energy management.

+ Seamless Integration for Smarter Energy Systems

Forms a complete 1+N scalable energy storage solution combining battery cabinets, DC/DC, and DC/AC converters. Enables efficient energy flow across charging and discharging cycles, supporting solar PV, diesel generation, and grid connection to ensure reliable power supply and optimized energy use.

ESS-GRID 241C P500L P500E Seamless Integration
Specifications

See inside the performance

BESS Page Datasheet
System Capacity
500kW / 241.1kWh
Battery Chemistry
Lithium Iron Phosphate (LiFePO₄)
Battery Capacity
241.1kWh
Rated Battery Voltage
768V
Battery Voltage Range
672V ~ 852V
PCS Rated Power
500kW
PCS Maximum Power
550kW
PV Input Power
500kW
PV Voltage Range
312V ~ 500V
Max. Charge/Discharge Current
157A
Protection Rating
IP55
Cooling Method
Intelligent Air Cooling
Operating Temperature
-25℃ ~ 60℃
Communication
CAN / RS485 / Ethernet
Display
Touch LCD Screen
Noise Level
<80dB
Altitude
≤3000m
Dimension
1450×1150×2300mm
Weight
2450kg

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