261kWh All-in-One Commercial & Industrial Energy Storage Cabinet

It depends on your site conditions. If your project is in a temperate climate (average below 35°C), you don't have strict noise requirements, and you want the lowest upfront cost with minimal maintenance, go air-cooled. If you're in a hot region (Middle East, Southeast Asia, Africa), need the battery to cycle aggressively every day, or have noise limits near offices or residential areas, liquid cooling will give you better thermal uniformity, longer actual cycle life, and quieter operation. Both variants share the exact same cabinet footprint, PCS, BMS, and communication interfaces - so your EMS integration and site layout don't change regardless of which cooling you pick.

The CBS261 uses an isolation transformer between the battery/PCS system and the grid connection. This provides galvanic isolation - meaning there's no direct electrical path between the DC battery side and the AC grid side. It eliminates DC injection into the grid (a requirement in many countries), protects your equipment from grid-side surges and faults, and makes the system safer for maintenance personnel. In industrial environments with electrically noisy loads (VFDs, welding machines, heavy motors), transformer isolation prevents those disturbances from affecting battery performance. It also satisfies stricter grid codes that some utilities require for BESS grid connections.

You can parallel 2 to 5 CBS261 cabinets using a single AC combiner cabinet, scaling from 465.8kWh all the way up to 1,164.5kWh (approximately 1.16MWh) at 250–625kW power. Each cabinet operates independently with its own PCS and BMS, so if one unit needs maintenance, the others keep running - no full-system shutdown required. For projects larger than 1.16MWh, multiple parallel groups can be connected. This modular approach lets you start with one cabinet and expand as your energy needs or budget grow, without re-engineering the site. Learn more about how battery array parallel configurations work.

Yes. The CBS261 supports an optional built-in MPPT (Maximum Power Point Tracking) controller, which means you can connect PV strings directly to the cabinet without a separate solar inverter. This reduces your balance-of-system costs and simplifies installation. The system intelligently manages PV charging priority: solar charges the battery first, excess feeds to loads or grid, and the battery fills from grid only when solar isn't enough. If your project doesn't include PV, the MPPT module is simply omitted - you're not paying for hardware you don't need. How solar + battery storage cuts electricity bills →

Yes. The CBS261 supports off-grid operation and can be configured with an optional STS (Static Transfer Switch) for automatic, seamless switchover from grid to battery power. The transfer happens in milliseconds - fast enough to keep critical equipment running without interruption. The system also supports black start, meaning it can energize your local electrical system from a completely dead state without needing any external power source. This is especially valuable for factories, cold storage facilities, telecom sites, and any operation where even brief power interruptions cause significant financial loss. How BESS backup and black start actually work →

The CBS261 uses grade-A LiFePO4 314Ah prismatic cells in a 260S1P (5 packs × 52 cells series) high-voltage architecture. At standard test conditions (25°C, 0.5C charge/discharge, 90% DoD), the battery delivers 6,500+ cycles before reaching 80% end-of-life capacity. In real-world operation with one cycle per day, that translates to roughly 17+ years of battery service life. The liquid-cooled variant may extend actual cycle life in hot climates by maintaining tighter cell temperature uniformity. Read more about LFP battery lifespan and performance →

Safety is multi-layered across four levels. At the cell level, each LiFePO4 cell has inherent thermal stability (no thermal runaway below 270°C). At the pack level, the BMS monitors voltage, current, temperature, and SOC of every cell in real-time with millisecond response. At the cabinet level, the enclosure includes fire detection (smoke + temperature sensors), active ventilation/exhaust, and fire suppression system. At the system level, industrial transformer isolation provides galvanic separation from the grid, and the IP54 enclosure protects against dust and water ingress for outdoor deployment. The full certification stack - IEC/EN62619, IEC/EN62477, UN38.3, UN3480, IEC/EN61000, IEC/UL60730, GB/T36276 - validates compliance with international battery, electrical, and transport safety standards. Learn more about lithium-ion BESS safety →

The CBS261 is designed for real-world industrial conditions. Operating temperature range is -20°C to +55°C (with derating above 45°C), which covers everything from Nordic winters to Middle Eastern summers. It's rated for altitudes up to 3,000 meters without power derating - higher than most competitors' 2,000m limit - making it suitable for high-altitude regions in Latin America, Central Asia, and East Africa. IP54 protection handles outdoor rain, dust, and humidity (0–95% non-condensing). Whether you're deploying on a factory rooftop, a desert solar farm, or a mountain mining site, this cabinet is engineered to perform. Explore BESS deployment in extreme environments →

The CBS261 comes with triple communication interfaces: CAN bus, Ethernet, and RS485. This means it integrates with virtually any SCADA, EMS, or building management system your site already uses. The built-in LCD display provides local status monitoring (SOC, power, alarms), while the Ethernet connection enables remote cloud monitoring, diagnostics, and firmware updates from anywhere. For multi-cabinet installations, the EMS coordinates charge/discharge scheduling, load following, and PV optimization across all parallel units. Standard Modbus TCP/RTU communication protocols are provided, and custom integration is supported for large-scale or utility-grade projects.

The system holds a comprehensive certification portfolio covering battery safety, electrical safety, EMC compatibility, and transport compliance: IEC/EN62619 (battery safety), IEC/EN62477 (power converter safety), IEC/EN61000 (electromagnetic compatibility), IEC/UL60730 (automatic electrical controls), IEC/EN60730 (thermal controls), UN38.3 and UN3480 (dangerous goods transport), and GB/T36276 (Chinese national standard for energy storage). This combination covers market access in Europe, Asia-Pacific, Middle East, Africa, and most global markets. For projects requiring UL9540/UL9540A (North America), please contact our engineering team for project-specific certification support. You can also review our BESS procurement and certification guide for more details.