125kW 261kWh Liquid-Cooled
LiFePO4 Mobile Energy Storage System
The BSLBATT M-Power S125/261 is a 125kW/261kWh mobile energy storage system using lithium iron phosphate (LiFePO4) cells. It integrates a 125kW PCS, 261kWh battery pack, and hybrid air-liquid cooling in a single IP55-rated enclosure weighing 2,500 kg. The system provides 200A three-phase AC output and charges from grid, diesel generators, or DC charging stations. Two units connect in parallel for 250kW/522kWh. Built for heavy construction, mining operations, large-scale events, and industrial field operations where high continuous power and extended runtime are required.
125kW Liquid-Cooled Mobile Energy Storage
125kW continuous three-phase AC power. 261kWh usable energy. Hybrid air-liquid cooling holds full rated output where air-cooled units would derate.
Three 200A three-phase connectors and two 16A single-phase sockets serve heavy equipment and auxiliary loads from a single unit.
Charges from grid, diesel generators, or DC charging stations. In hybrid mode, the battery absorbs base loads and peak demands while the generator runs only at optimal efficiency.
Two units connect in parallel for 250kW/522kWh. IP55-rated steel enclosure, -20°C to 55°C operating range, 2,500 kg.
261 kWh
Storage Capacity
125 kW
AC Power Output
Air + Liquid
Cooling
200A
Max Discharge Current
5 Years
Product Warranty
2 Units
Max. Parallel
IP55
Protection Rating
2000*1300*1560
Dimensions (mm)
Hybrid Air-Liquid Cooling for Sustained High-Output Operation
The S125/261 is a M-Power model with hybrid air-liquid cooling. The liquid cooling circuit manages battery cell temperature during sustained high-current discharge, while the air cooling system handles PCS and auxiliary component heat. This dual approach maintains consistent performance across a -20°C to 55°C operating range without manual intervention.
Why this matters at 125kW: at full rated output, battery cells generate significantly more heat than in the 30kW or 60kW models. Air cooling alone would require either derating the output or accepting accelerated thermal stress. The liquid cooling system removes that trade-off, allowing the S125/261 to hold its full 125kW output in conditions where a purely air-cooled unit of similar capacity would throttle.
IP55 Outdoor Protection at 2,500 kg
At 2,000 × 1,300 × 1,560 mm and 2,500 kg, the S125/261 is a heavy-duty unit designed for crane or forklift deployment. The IP55-rated steel enclosure protects all internal components against dust ingress and water jets from any direction.
The system operates at altitudes up to 3,000 m with derating above 2,000 m. Optional aerosol fire suppression provides an additional safety layer for deployments in remote locations where fire response is limited. All communication protocols (RS485, CAN, Ethernet, Wi-Fi, 4G, dry contact) are built in for remote monitoring and fleet management.
Diesel Generator Hybrid Mode for Heavy Worksites
The S125/261 is designed to work alongside diesel generators, not replace them outright. In hybrid mode, the battery handles base loads and absorbs peak demands while the generator runs only when needed at optimal load points. The system automatically starts and stops the connected generator based on battery state of charge and load demand.
During low-demand periods, the battery takes over entirely and the generator shuts down. On 24-hour construction or mining sites, this means the generator runs fewer hours per day, consuming less fuel and requiring less frequent maintenance. When the site load exceeds 125kW, the generator and battery share the load simultaneously.
Parallel to 250kW / 522kWh for Large-Scale Operations
Two M-Power S125/261 units connect in parallel to deliver 250kW of continuous power and 522kWh of usable energy. The parallel configuration uses automatic load balancing across both units.
This covers the range from single-unit deployments (125kW for mid-to-large construction sites, mining base loads, or stadium events) to dual-unit configurations (250kW for heavy industrial operations, large-scale emergency response, or temporary grid support). For operations that require even more flexibility, the M-Power S60/125 and S30/69 can be deployed alongside to handle separate load zones on the same site.
125kW Mobile Power Build for Heavy Industry and Large Events
Heavy Construction & Infrastructure Projects
Large-scale construction sites running tower cranes, concrete batch plants, welding stations, and site lighting simultaneously need sustained three-phase power above 100kW. The S125/261 handles these loads from a single unit, reducing the number of diesel generators required on site. In hybrid mode, the battery covers peak draws while the generator runs at its most fuel-efficient load point.
Mining & Oil Field Operations
Remote mining and oil field sites depend on diesel generators for primary power, but generator fuel delivery is often the single largest logistics expense. The S125/261 paired with a diesel generator reduces generator runtime by absorbing base loads and peak demands. Its IP55 enclosure and -20°C to 55°C operating range handle the conditions typical of remote extraction sites.
Large Events & Temporary Venues
Stadiums, music festivals, film production, and temporary exhibition venues require high power output with minimal noise and zero exhaust. The S125/261 provides 125kW of clean power for LED walls, sound systems, broadcast equipment, and hospitality services. Two units in parallel cover 250kW for the largest venue configurations.
Emergency Response & Disaster Recovery
Field hospitals, water treatment systems, communication infrastructure, and temporary shelters need immediate high-capacity power. The S125/261 charges from any available source (grid, generator, or DC charging station) and deploys as a self-contained power source. Its 261kWh capacity sustains critical loads through extended outage periods.
Mobile EV Charging
Temporary EV charging hubs at events, construction sites, or roadside locations require stable high-power DC output. The optional 20kW DC output module allows the S125/261 to serve as a mobile charging point alongside its primary AC load supply.
Optional 20kW DC Output for Forklift and Equipment Charging
The M-Power S125/261 supports an optional 20kW DC charger module for charging forklift batteries and other DC-powered equipment directly from the mobile ESS. This eliminates the need for a separate charging station on sites where electric forklifts and material handlers are in regular use.
The DC output operates independently from the AC power delivery, meaning the system can charge forklifts while simultaneously powering AC loads on site.
Partner with BSLBATT, a Global LiFePO4 Battery Manufacturer
OEM & ODM Available
Every unit is assembled, tested, and QC-certified in-house before shipment. The full order-to-delivery cycle takes approximately 8 weeks, covering technical drawing confirmation, raw material procurement, production, testing, packaging, DG approval, and global shipping.
Custom branding, enclosure colors, trailer mounting configurations, and BMS communication profile adjustments are handled at production-line level. BSLBATT's engineering team supports system integration for equipment rental companies, diesel generator distributors, and energy service providers entering the mobile storage market.
Global Logistics & Service
BSLBATT manufactures the M-Power S125/261 at its facility in Huizhou, China, and provides regional logistics and after-sales support through offices and service points in North America (Dallas, TX), Europe, Australia, Africa, and other markets. Contact BSLBATT for project pricing, MOQ, and sample availability.
5-Year Manufacturer Warranty
The M-Power S125/261 includes a 5-year BSLBATT manufacturer warranty covering the battery pack, PCS, BMS, and all integrated components. Support is factory-backed, with regional service points that handle warranty cases. Ask BSLBATT for the current warranty letter when you need the full terms.
M-Power S30/69 vs. S60/125 vs. S125/261: Choosing the Right Size
All three M-Power models use LiFePO4 chemistry, IP55 enclosures, and support diesel hybrid operation. The choice depends on power demand, cooling requirements, and solar integration needs.
| Model | S30/69 | S60/125 | S125/261 |
|---|---|---|---|
| Rated Power | 30 kW | 60 kW | 125 kW |
| Energy Capacity | 69 kWh | 125 kWh | 261 kWh |
| Solar Input | 38.4 kW (2 MPPT, optional) | 108 kW (4 MPPT) | Not supported |
| Cell | 3.2 V / 150 Ah | 3.2 V / 205 Ah | 3.2 V / 314 Ah |
| Cooling | Air | Air | Air + Liquid |
| AC Output | 125 A three-phase × 3 | 125 A three-phase × 3 | 200 A three-phase × 3 |
| Parallel | Up to 3 units | Up to 2 units | Up to 2 units |
| Weight | 1,012 kg | 1,500 kg | 2,500 kg |
| Dimensions (mm) | 1060 × 1400 × 1030 | 1550 × 1200 × 1300 | 2000 × 1300 × 1560 |
| Warranty | 5 Years | 5 Years | 5 Years |
The M-Power S30/69 is the entry point for telecom backup, light construction, and small events where loads stay below 20-25kW average. Three units parallel to 90kW for mid-range jobs.
The M-Power S60/125 is the solar-optimized workhorse: it has the highest PV input in the series (108kW), making it the best fit for sites with consistent sun exposure where fuel delivery is expensive or impractical.
The S125/261 is the heavy-duty option for sustained high-power industrial loads. Its 314Ah cells and hybrid air-liquid cooling handle continuous 125kW discharge in conditions where air-cooled units would derate. It does not support PV input, so it is designed for grid/generator/DC charging deployments in heavy construction, mining, and large-scale events.
Frequently Asked Questions About the 125kW Mobile ESS
Q: How long does the M-Power S125/261 run at full load?
BSLBATT's M-Power S125/261 provides approximately two hours of runtime at its full 125kW rated output (261kWh ÷ 125kW). At typical partial loads averaging 40-60kW, runtime extends to four to six hours. In hybrid mode with a diesel generator, the system operates continuously with the generator handling recharging during peak periods.
Q: Can the M-Power S125/261 charge from solar panels?
BSLBATT's M-Power S125/261 does not include built-in solar input. It charges from three sources: AC grid connection, diesel generators, and a 125A DC charging socket. For deployments that require integrated solar charging, the M-Power S60/125 supports up to 108kW of PV input.
Q: Why does the S125/261 use liquid cooling instead of air cooling?
BSLBATT equipped the M-Power S125/261 with hybrid air-liquid cooling because sustained 125kW discharge generates more heat than air cooling alone can manage efficiently. The liquid cooling circuit maintains battery cell temperature within optimal range during continuous high-output operation, preventing thermal derating. The S30/69 and S60/125 use air cooling, which is sufficient for their lower power ratings.
Q: What generators are compatible with the M-Power S125/261 in hybrid mode?
BSLBATT's M-Power S125/261 works with standard three-phase diesel generators. The system accepts AC input and automatically manages the generator's start/stop cycle based on battery state of charge and load demand. No proprietary generator brand is required.
Q: What is the warranty on the M-Power S125/261?
BSLBATT provides a 5-year manufacturer warranty on the M-Power S125/261 covering the battery pack, PCS, BMS, and all integrated components under normal operating conditions.
Q: How does the S125/261 differ from BSLBATT's LC125-261 cabinet?
BSLBATT's M-Power S125/261 is a mobile, transportable unit designed for temporary deployment and relocation between sites. The LC125-261 is a stationary liquid-cooled C&I energy storage cabinet designed for permanent grid-connected installation. They share the same 125kW/261kWh capacity and 314Ah LFP cells, but serve fundamentally different use cases.
| Model | M-Power S125/261 |
| Battery Parameters | |
| Battery Type | Lithium Iron Phosphate (LFP) |
| Cell Capacity | 3.2V / 314Ah |
| Configuration | 1P52S*5S (1P240S) |
| Rated Energy | 261.2 kWh |
| Rated Charge / Discharge Power | 0.5P (25+2℃) |
| Max Charge / Discharge Current | 200A (25+2℃) |
| Rated Voltage | 768V |
| Operating Voltage Range | 672.0V~840V |
| PCS Side Parameters | |
| Rated Power | 125 kW |
| Max DC Current | 203A |
| DC Side Operating Voltage Range | DC615~950V (3W+PE) / DC650~950V (3W+N+PE) |
| Rated AC Voltage | AC230 / 400V, 3W+PE / 3W+N+PE |
| Rated AC Current | 180A |
| Rated AC Frequency | 50 / 60Hz (+5Hz) |
| Power Factor | 1 leading~1 lagging |
| THDI | <3% |
| Overload Capability | 110%, normal operation |
| External Interfaces | |
| 200A Three-Phase Power Box | 3 |
| 16A Single-Phase Socket | 2 |
| 125A DC Charging Socket | 1 |
| DC Output (Optional) | |
| 20kW Charger | 1 |
| General Parameters | |
| Operating Temperature | 10~90%RH (non-condensing) |
| Operating Humidity | -20°℃~55℃ (>45℃ derating) |
| Storage Temperature | 0℃~35℃ |
| Altitude | 3000m (>2000m derating) |
| Cooling Method | Intelligent air cooling+liquid cooling |
| Fire Protection | Aerosol fire extinguishing device (optional) |
| Communication | RS485 / CAN / Ethernet / Wi-Fi / 4G / Dry contact |
| Isolation Type | Non-isolated |
| Protection Class | IP55 |
| Dimensions (W*D*H,mm) | 2000*1300*1560 (+5) |
| Weight (kg) | 2500kg |
| Warranty | 5 years |
