The Deye BESS BOS-B in the 125 kW configuration is a flagship, high-tech solution for building a reliable energy independence system at large commercial, agricultural, and industrial facilities. This complex is designed for enterprises striving to protect mission-critical equipment from power outages, optimize energy costs by shifting consumption peaks, and maximize the efficiency of their own solar generation.
The heart of the system is the ultra-powerful 125 kW hybrid inverter (PCS), which operates synchronously with an industrial high-voltage battery cluster with a total capacity of 241.2 kWh (of which 217 kWh is usable capacity). The battery bank is formed from 15 series-connected, latest-generation LiFePO4 modules (16.08 kWh each, based on 314 Ah cells). This architecture allows safe operation with high charge and discharge currents (up to 180A).
Key Technological Advantages:
Seamless Backup and Heavy Inrush Current Handling (STS): Thanks to the specialized Static Transfer Switch module (with a throughput capacity of up to 500 kW), the system guarantees instant switching between the grid, generator, and batteries in less than 10 milliseconds. Your equipment won't feel any surges. The inverter has high overload resistance: it can operate continuously at 110% of its nominal rating and withstand short-term peak surges of up to 170% in off-grid mode, which is ideal for starting powerful industrial motors, pumps, and compressors.
Maximum Solar Generation Potential (PV / MPPT): The system comes with a dedicated PV module featuring 8 independent MPPT trackers. Thanks to a wide operating voltage range (180–850V) and high input currents (nominal 40A, short-circuit current up to 60A per tracker), you can connect a solar panel array with a total capacity of up to 250 kW, ensuring a rapid return on investment.
Smart Energy Distribution and Absolute Safety (EMS + BMS): The integrated Energy Management System (EMS) with high efficiency (98.5%) allows you to configure flexible operating scenarios: charging the battery at night at the lowest rate, using this energy during peak hours, and enabling zero-export to the grid. The multi-level BMS module continuously monitors the balance of each cell, protecting the high-voltage system (200–1000V) from overheating, deep discharge, and short circuits.
Scalability for Megaprojects: Deye's architecture allows the system to grow alongside your production needs. Up to 5 inverters can be connected in parallel to a single STS module. The STS modules themselves also support parallel connection, making it possible to create a giant power plant with a total capacity of over 2.5 MW.
Detailed Technical Specifications Deye BESS BOS-B (125 kW / 241.2 kWh)
PV Input Parameters (Solar Panels):
Maximum Solar Array Input Power: Up to 250 kW
Number of Independent MPPT Trackers: 8 pcs.
Maximum Input Voltage (Voc): 1000 V
MPPT Operating Voltage Range: 180 V – 850 V
Maximum Operating Current per MPPT: 40 A
Short-Circuit Current per MPPT: 60 A
AC Characteristics (Grid and Load):
Nominal Output Power (AC): 125 kW
Maximum Continuous Output Power: 137.5 kW (110% overload)
Peak Output Power (Off-Grid Mode): Up to 212.5 kW (short-term, 170% for inrush currents)
Grid Connection: Three-phase (3L + N + PE), 400 V
Nominal Frequency: 50 Hz / 60 Hz (auto-sensing)
Total Harmonic Distortion (THDi): <3% (perfectly pure sine wave for highly sensitive equipment)
Switching Time to Backup Power (STS): <10 ms
High-Voltage Battery Parameters:
Cell Chemistry Type: LiFePO4 (Lithium Iron Phosphate)
Cluster Configuration: 15 series-connected modules
Nominal Battery Pack Voltage: 768 V
Battery Operating Voltage Range: 672 V – 864 V
Maximum Charge/Discharge Current: 180 A
Depth of Discharge (DoD): Up to 90% (optimal for extending service life)
Cycle Life: >6000 cycles (under 25°C temperature conditions)
Communication, Protection, and Operating Conditions:
Cooling System: Intelligent active cooling (Smart Air Cooling)
Monitoring Interfaces: RS485, CAN, Ethernet (supports remote monitoring via Deye Cloud app and web portal)
Fire Safety: Built-in automatic aerosol fire extinguishing system inside the battery compartments.
Maximum Installation Altitude: Up to 2000 m above sea level without power derating.
Acoustic Noise: <65 dB
Certification: CE, IEC62619, VDE (full compliance with strict international standards).
Dimensions and Weight of the Complex:
Overall Approximate Dimensions (W×H×D): 2150 × 1136 × 800 mm
Total System Weight: ≈ 1950 kg
Hybrid Inverter (PCS 125kW): 543 × 310 × 775 mm | Protection: IP65
MPPT Module: 543 × 197.8 × 700 mm | Protection: IP65
STS Module: 543 × 575 × 866 mm | Protection: IP20
Control Unit (PDU): 795.9 × 526 × 274.2 mm | Weight: ≈ 23 kg
Single Battery Module (16.08 kWh): Weight ≈ 123 kg
Operating Temperature Range: -25°C to +60°C
Official Manufacturer Warranty: 10 years.
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