Battery HV Flagship

BOS-G High-Voltage Battery · 15–61 kWh

BOS-G (G15–G60)

15.36–61.44 kWh

19-inch rack-mounted high-voltage LFP, 15.36–61.44 kWh from 3–12 stackable 5.12 kWh modules. Cobalt-free LiFePO4, ≥6000 cycles, paired with an HVB750V/100A-EU cluster control box. The primary G-family battery for Suncloud's small C&I builds, with BOS-G Pro as the alternative; an outdoor cabinet build is listed separately.

CommercialUtility

Usable energy: 15.36–61.44 kWh
Modules: 3–12 × 5.12 kWh
System voltage: 153.6–614.4 V
Chemistry: LiFePO4 (cobalt-free)
Nominal current: 100 A (peak 125 A)
Cycle life: ≥6000 (70% EOL)
Mounting: 19″ rack
Warranty: 10 years (conditions apply — see the linked Deye warranty)

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Specifications

Module

Cell chemistry: LiFePO4
Module energy: 5.12 kWh
Module nominal voltage: 51.2 V
Module capacity: 100 Ah
Module weight: 45 kg (BOS-GM5.1)

System

Modules in series: 3–12 (BOS-G15…G60)
System nominal voltage: 153.6 V (G15) → 614.4 V (G60)
System energy: 15.36 kWh (G15) → 61.44 kWh (G60)
Recommended DoD: 100%
Cluster control box: HVB750V/100A-EU · 120–750 V DC · 100 A nominal / 125 A max.
Parallel operation: Up to 16 racks in parallel · up to 10 inverters in AC parallel
Inverter connection: Deye SG01HP3 hybrid · SUN-10–25K-SG01HP3-AU-AM2 (Deye's AU build table lists 12–25K), with the optional BOS-G55-Cabinet-AP-A adapter kit · SUN-29.9–50K-SG01HP3-AU-BM3/BM4

Charge/discharge

Recommended current: 50 A
Nominal current: 100 A
Peak discharge: 125 A (2 min, 25 °C)

General

Working temperature: Charge 0–55 °C · Discharge −20–55 °C
Communication: CAN 2.0 / RS485
Altitude: ≤2000 m
IP rating: IP20
Installation: Rack mounting (19″), indoor · outdoor in a BOS-G55-Cabinet or BOS-G50-Cabinet
Cycle life: ≥6000 (25 °C, 0.5C/0.5C, 70% EOL)
Certification: CE / IEC62619 / VDE2510-50 / UL1973 / UL9540A / UN38.3
Warranty: 10 years (conditions apply — see the linked Deye warranty)

Highlights

Modular HV stack — combine 3–12 × 5.12 kWh modules (BOS-GM5.1) for 15.36–61.44 kWh per cluster.
19-inch embedded module design for fast rack installation and maintenance.
Cobalt-free LiFePO4 with intelligent BMS (over-charge/discharge, over-current, temperature protection and cell balancing).
≥6000 cycles at 100% DoD, with a 10-year warranty (see the linked Deye warranty for its conditions).
Up to 6 months shelf storage without recharge; remote firmware upgrade via compatible Deye inverters.

System components

A BOS-G cluster is made up of:

BOS-GM5.1 battery modules (5.12 kWh each, 45 kg)
HVB750V/100A-EU high-voltage cluster control box (120–750 Vdc, 100 A nominal / 125 A max), the version in Deye’s AU configuration list
For indoor installs, an optional 3U-HRACK (12 modules) or 3U-LRACK (8 modules) 19″ rack

Multiple clusters can be paralleled for larger commercial systems, up to 16 racks in parallel.

BOS-G is the primary G-family battery in Suncloud’s small C&I builds. BOS-G Pro is the alternative, with its own control box (BOS-G-PDU-2) and modules (BOS-G-Pack5.1).

Outdoor installation

For outdoor sites, see the BOS-G Outdoor Solution. The BOS-G55-Cabinet (IP55) holds one HVB750V/100A-EU and up to 11 BOS-GM5.1 modules, so no rack is needed. The taller BOS-G50-Cabinet is IP54.

Figures are from the official Deye BOS-G Series brochure (AU, V1.0, 2025-11-19), the BOS-G55-Cabinet datasheet (V1.0, 2026-09-08) and the BOS-G50-Cabinet & SE-G50-Cabinet brochure (EU, V1.0, 2026-03-20) for the cabinets, and Deye’s AU indoor/outdoor configuration list (V1.0, 2026-09-10) for the control box variant and inverter pairing. Deye’s AU documents pair BOS-G with SG01HP3 hybrids only. The warranty terms are in Deye’s linked AU battery warranty for BOS-G (13 December 2025 revision). Confirm the configuration against the datasheet and installation manual before quoting or commissioning.