DEYE BOS-B Pro-A3 ESS

BOS-B Pro-A3 – High-voltage battery for commercial and industrial energy storage

The BOS-B Pro-A3 from Deye is a next-generation LiFePO4 energy storage system designed for demanding commercial and industrial applications. Its modular architecture (5–15 battery modules connected in series) allows flexible scaling of capacity and power, while compatibility with PCS ratings from 100/125 kW up to 2.5 MW enables both compact and large-scale C&I solutions.

Delivering 241.15 kWh of nominal energy and 217.04 kWh of usable energy at a recommended 90 % depth of discharge, BOS-B Pro-A3 is ideal for peak shaving, backup power, tariff optimisation and enhancing the energy independence of businesses. The system uses inherently stable LiFePO4 chemistry, an intelligent BMS and supports aerosol fire suppression systems to ensure a high level of safety and long service life.

Key benefits:

• High cluster capacity: up to 241.15 kWh nominal and 217.04 kWh usable energy

• Modular and scalable: 5 to 15 modules of 16.08 kWh each, with support for multi-rack configurations

• PCS compatibility from 100/125 kW with expansion up to 2.5 MW for C&I projects

• Fast transfer: STS ensures smooth transfer within ≤20 ms to protect critical loads

• High efficiency: PCS efficiency around 98.5 % and MPPT efficiency above 99 %

• Long cycle life: more than 6000 cycles (EOL 70 %) with a 10-year warranty

• Smart control: precise SOC monitoring, fault code display, peak load management and reverse power flow protection

• Maximum safety: stable LiFePO4 chemistry and support for aerosol fire suppression systems

• Compact rack-mounted design (2150×1136×800 mm) for installation in technical rooms, plant rooms and energy centres

BOS-B Pro-A3 is an excellent choice for factories, business centres, commercial buildings, data rooms and other facilities with critical loads that require a reliable, safe and scalable energy storage system.