DEYE Battery Set BOS-G25 Pro 25.6kWh (high voltage)

BOS-G25 is a modular high voltage battery set from the BOS-G series with a total energy capacity of 25.6 kWh (system nominal energy). Designed to work with C&I energy storage systems, it provides relatively large capacity in a multi-module configuration with external control and communication.

Manufacturer: Deye — a provider of ESS solutions, offering modular lithium iron phosphate (LiFePO4) batteries and components for rack installation. The manufacturer's technical documentation describes cyclic parameters, communication interfaces, and protection and operating conditions for the BOS-G modules.

Technical Parameters (Electrical and Functional)

• Cell chemistry: LiFePO4 (LFP)
• Module capacity: 100 Ah
• Nominal module voltage: 51.2 V DC
• Energy of a single module: 5.12 kWh
• Number of modules in the BOS-G25 set: 5 (system nominal voltage 51.2 V × 5 = 256 V)
• System energy (nominal): 25.6 kWh
• Usable system energy: 23.04 kWh (DC usable energy at 90% DOD, test conditions)
• Recommended charging/discharging current: 50 A
• Nominal charging/discharging current: 100 A; maximum peak discharge current: 125 A
• Cycle life: ≥6000 cycles (25±2°C, 0.5C/0.5C, to EOL 70%)

Mechanical and Environmental Parameters

• Operating temperature (charging): 0 °C to 55 °C
• Operating temperature (discharging): −20 °C to 55 °C
• Storage temperature: 0 °C to 35 °C
• Protection degree: IP20
• Communication: CAN2.0 / RS485
• Operating humidity: 5% – 85% RH
• Maximum height above sea level: ≤ 2000 m