125kW 261kWh All-in-One C&I Energy Storage Cabinet
The 125kW 261 kWh All-in-One Energy Storage Cabinet is a compact, high-voltage C&I solution designed to help you cut demand charges, shift energy to low-tariff hours, and keep critical loads running when the grid is unstable. With an integrated battery + power conversion architecture and liquid-cooling thermal control, it delivers stable output and long cycle life in real-world operating conditions-ideal for commercial buildings, factories, data centers, and EV charging sites.
Optimized for Your Energy Needs
Easy monitoring and integration
Local LCD provides clear status at the cabinet, while CAN / RS485 / Ethernet interfaces make it simple to connect to EMS/SCADA workflows for monitoring, dispatch, alarms, and remote O&M-reducing on-site troubleshooting time.
Peak-Shaving Power
Rated at 125 kW, it handles demand peaks and supports stronger peak-shaving performance. With efficiency up to 98.6%, more stored energy becomes usable power-helping improve real savings and shorten payback.
Real-World Reliability
Liquid cooling improves temperature consistency and supports long-duration charge/discharge. The system operates from −30°C to +60°C (up to 95% non-condensing humidity), making it reliable for outdoor and industrial environments.
261 kWh in One Cabinet
High energy is integrated in a single standardized cabinet, reducing site footprint and simplifying installation. Ideal for C&I projects that need quick rollout for peak shaving, tariff shifting, and backup reserve without container-level complexity.
Specification
| Model | CBS261(A/L) | |
| Battery Side | Battery Type | LFP314Ah |
| Cells series & parallel | 260S1P (5*52S1P) | |
| Battery Rated Voltage | 832 V | |
| Voltage Range | 728~936V | |
| Battery Rated Energy | 261.2 kWh | |
| AC Side | Rated Output Power | 125 kW |
| Output Current | 180 A | |
| Rated Grid Voltage | AC 400 V | |
| AC Access Method | 3P 3W+PE or 3P 3W+N+PE | |
| Grid Frequency | 50 Hz / 60 Hz | |
| THDi | ≤ 3% (full load) | |
| Power Factor | -1leading to+1 lagging | |
| System Parameters | Maximum PCS Converter Efficiency | 98.6% |
| Configuration | STS(Optional),PCS | |
| Charge/Discharge Rate | ≤0.5P (157A) | |
| Operating Temperature | -30 ~ +60℃ | |
| Relative Humidity | 0–95% (no condensation) | |
| Altitude | 4000m (>2000m derating) | |
| IP Level | IP54 | |
| Cycle Numbers | 8500@25℃ 0.5C/0.5C,90%DOD,80%EOL | |
| Communication | CAN / Ethernet / RS485 | |
| Display | LCD | |
| Noise | <75dB (1m away from the horizontal position of the device) | |
| Cooling Method | Liquid Cooling/Air cooling | |
| Certifications & Standards | IEC/EN62619, IEC/EN60730, UN38.3, UN3480, IEC/EN62477, IEC/EN61000, IEC/UL60730, GB/T36276 |
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| Scenarios | C&I,0.5P | |
| 261.2kWh, 1*CBS261 465.8kWh~1164.5kWh, 2~5*CBS261 + 1*AC combiner cabinet |
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Typical Applications
As shown above, the CBS261 system connects to the grid through a dedicated control cabinet and supports parallel expansion of up to 5 battery cabinets (1,164.5 kWh total). A cloud-based EMS enables remote monitoring, energy scheduling, and alarm management from any device. On the input side, the system accepts power from PV arrays and wind turbines alongside the grid. On the output side, it serves diverse commercial and industrial loads. The 832V high-voltage battery architecture reduces system current and cable losses, contributing to the 98.6% overall PCS conversion efficiency. Both liquid-cooled (CBS261L) and air-cooled (CBS261A) variants are available to match specific site conditions and budget requirements.
Application Scenarios
Peak Shaving & Demand Charge Reduction for Commercial Buildings
Shopping malls, office towers, and retail chains face steep demand charges during business hours. The CBS261 charges from the grid during off-peak valley-rate periods and discharges during peak demand windows, directly cutting monthly electricity bills. With 125 kW rated output and ≤3% THDi, it delivers clean, stable power without affecting sensitive building equipment. The system supports 50 Hz and 60 Hz grid frequencies, making it deployable across global markets without hardware changes.
Smart Factory & Industrial Park Energy Management
Manufacturing facilities with heavy machinery face variable and unpredictable power loads. The CBS261 smooths demand spikes, reduces peak charges, and improves power quality across production lines. For larger industrial parks, multiple cabinets connect in parallel through an AC combiner cabinet-scaling from 261 kWh to 1,164.5 kWh with centralized EMS control. Each unit operates independently with its own BMS and PCS, so a fault in one cabinet does not interrupt the others. The system also supports deployment at altitudes up to 4,000 meters (with derating above 2,000 m), suitable for highland industrial zones.
Data Center & Critical Infrastructure Backup
Data centers, hospitals, and telecom facilities require uninterrupted power with zero tolerance for downtime. The CBS261 supplements existing UPS systems with 261 kWh of backup energy and fast discharge response. With an optional STS (Static Transfer Switch) module, the system achieves seamless on/off-grid switching in ≤10 ms-ensuring critical loads stay powered during grid outages. The 8,500-cycle LFP battery at 90% DOD provides over 20 years of reliable service under daily cycling, far exceeding the typical replacement cycle of lead-acid UPS batteries.
EV Charging Station Energy Buffering
High-traffic EV charging sites equipped with DC fast chargers can exceed grid connection limits during simultaneous charging sessions. The CBS261 buffers energy during off-peak hours and releases it during peak charging demand, reducing the required grid connection capacity and avoiding costly infrastructure upgrades. Pair this cabinet with Polinovel's 60kW–360kW DC fast chargers or 480kW–990kW charging stations for a fully integrated charging-plus-storage solution.
Solar + Storage (PV-BESS) for Self-Consumption Optimization
When paired with rooftop or ground-mount PV systems, the CBS261 stores excess solar generation during the day and dispatches it during evening peak hours-maximizing self-consumption rates and reducing grid dependency. The system is officially compatible with 12 leading inverter brands including Deye, GoodWe, Growatt, SMA, and Victron, ensuring seamless integration with most commercial solar installations. For projects requiring both on-grid operation and off-grid backup capability, the optional STS module enables automatic switchover without manual intervention.
Project References
Guangdong, China
Peak Shaving for a Textile Manufacturing Plant
Chonburi, Thailand
Solar + Storage at a Logistics Warehouse
North Rhine-Westphalia, Germany
EV Charging Hub Grid Buffering
Listed by Leading Inverter Brands
Our batteries are officially listed as compatible by several globally recognized inverter manufacturers. Each product has undergone rigorous testing and validation to ensure seamless communication, reliable operation, and full compatibility across diverse inverter platforms.
Frequently Asked Questions
Q: How Long Will The CBS261 Battery Last In Daily Commercial Use?
A: The CBS261 uses LFP 314Ah cells rated for 8,500 cycles at 25°C under 0.5C charge/discharge, 90% depth of discharge (DOD), reaching 80% end-of-life capacity. For a typical C&I facility cycling once per day, this translates to over 23 years of operational life before the battery reaches its EOL threshold. LFP chemistry also provides inherently higher thermal stability compared to NMC alternatives, reducing the risk of thermal runaway throughout the system's lifespan.
Q: What Is The Advantage Of The 832V High-Voltage Architecture?
A: The CBS261 uses a 260S1P configuration with a nominal voltage of 832V-significantly higher than the 512V–614V range common in many competing cabinets. Higher DC bus voltage means lower operating current at the same power output (125 kW), which reduces I²R cable losses, allows smaller cable cross-sections, and improves overall round-trip efficiency. This is one of the reasons the CBS261 achieves 98.6% PCS conversion efficiency.
Q: What Is The Difference Between The CBS261L (Liquid-Cooled) And CBS261A (Air-Cooled) Models?
A: The CBS261L uses a circulating coolant loop to maintain ±3°C temperature uniformity across all battery modules-ideal for high-ambient-temperature regions or sites requiring sustained high-rate cycling. The CBS261A uses forced-air ventilation, which is simpler and lower cost but results in wider temperature gradients (typically ±5–8°C). Liquid cooling extends cycle life, supports better sustained output in hot climates, and operates at lower noise levels. Both variants share the same form factor, electrical specifications, and communication interfaces, so the choice depends on your site conditions and budget.
Q: Can The CBS261 Switch Between On-Grid And Off-Grid Operation?
A: Yes, with an optional STS (Static Transfer Switch) module. The STS enables seamless on/off-grid switching with a transfer time of ≤10 ms, which is fast enough to maintain power to critical loads like servers, production lines, and medical equipment during grid outages. In standard on-grid mode, the system performs peak shaving, tariff shifting, and demand response. When the grid fails, it automatically transitions to off-grid backup mode without manual intervention.
Q: How Many CBS261 Cabinets Can Be Connected In Parallel, And How Does It Work?
A: Up to 5 CBS261 cabinets can operate in parallel through an AC combiner cabinet, scaling total capacity from 261.2 kWh to 1,164.5 kWh and total power from 125 kW to 625 kW. Each cabinet retains its own independent BMS and PCS, so the failure of one unit does not affect the rest of the system. The cloud EMS coordinates charging and discharging schedules across all parallel units. This modular approach lets you start with a single cabinet and expand as your energy demands grow-without redesigning the system or interrupting existing operations.
Q: Which Inverter Brands Are Compatible With This Energy Storage Cabinet?
A: The CBS261 has been tested and officially listed as compatible by 12 globally recognized inverter manufacturers: Deye, GoodWe, Growatt, SAJ, SMA, Victron Energy, Afore, Sunsynk, Solis, Phocos, TBB Power, and Studer Innotec. This broad compatibility means it integrates with most existing commercial solar installations without requiring custom firmware or additional protocol converters. Communication is handled through standard CAN / RS485 / Ethernet interfaces, and detailed integration guides are available for each supported inverter brand.
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