Deye ESS BOS-G40 40kWh Small-Scale C&I Energy Storage Solution

Deye BOS-G40 Smart Storage for Spaces That Never Slow Down

Deye ESS BOS-G40 40kWh Small-Scale C&I Energy Storage Solution is a modular high-voltage lithium iron phosphate battery system built for small-scale commercial and industrial use. It delivers reliable energy storage with scalable capacity, strong safety certifications, long cycle life, and seamless compatibility with solar systems for backup power and energy cost management. 

Discover how the Deye BOS-G40 40kWh IP20 Indoor HV Battery Rack can support consistent power and smarter energy use in your facility. View the system today and choose a dependable storage solution designed for long-term performance.

Features

• Safe LiFePO₄ battery with intelligent BMS and 10-year warranty
• Advanced protection against over charge over discharge over current and temperature issues
• Automatic charge-discharge control with cell voltage balancing
• Low self-discharge with up to 6 months energy retention and no memory effect
• Flexible system expansion supporting 3 to 12 battery packs in series
• Remote monitoring, management, and system upgrades for easy control

Specifications

• Cell Chemistry: LiFePO₄
• Total / Usable Energy: 40.96 kWh / 36.86 kWh
• Nominal System Voltage: 409.6 V DC
• Operating Voltage Range: 332.8 to 467.2 V DC
• Module Specs (× 8): 5.12 kWh, 51.2 V, 100 Ah
• Charge / Discharge Current: 50 A recommended, 100 A nominal, 125 A peak (2 min at 25 °C)
• Cycle Life: ≥ 6,000 cycles (90 percent DoD, 25 °C, 0.5 C)
• Operating Temperature: Charge 32 to 131 °F (0 to 55 °C) • Discharge −4 to 131 °F (−20 to 55 °C)
• Ingress Rating: IP20 for indoor rack installation
• Dimensions (W × D × H): 20.9 × 23.7 × 86.1 inches (530 × 602 × 2,187 mm)
• Weight (approx.): 1,036.17 lbs (470 kg)
• Certifications: UL 1973, UL 9540A, CE, IEC 62619, VDE 2510-50, UN 38.3

Product Documents

• Specs Sheet
• User Manual