Battery HV

BOS-B Pro-A3 High-Voltage Battery

BOS-B Pro-A3

80.38–257.23 kWh

Rack-mounted HV LFP battery for C&I systems from a single 29.9 kW hybrid inverter up to 2.5 MW. Clusters from 80 to 257 kWh (5–16 × 16.08 kWh packs), up to 16 clusters in parallel. Pairs with Deye SUN-29.9–50K-SG01HP3 and SUN-60–80K-SG02HP3 hybrid inverters, or with the 100/125 kW PCS + MPPT + STS modular system. An outdoor cabinet version is listed separately.

CommercialUtility

Usable energy: Up to 231.5 kWh (16 packs)
System power: 29.9 kW (one hybrid inverter) – 2.5 MW (PCS system)
Cluster energy: 80–257 kWh (5–16 packs per cluster)
Module: 16.08 kWh · 51.2 V · 314 Ah LFP
System nominal voltage: Up to 819.2 V (16 packs)
Max. current: 180 A
Cycle life: ≥6000 (70% EOL)
Warranty: 10 years per Deye datasheet — confirm terms with Suncloud

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Specifications

Module

Battery module energy: 16.08 kWh
Battery module nominal voltage: 51.2 V
Battery module capacity: 314 Ah
Module weight (approx.): 126 kg

System

Packs per cluster: 5–16
System power range: 29.9 kW (one hybrid inverter) – 2.5 MW (PCS system)
Max. system energy (16 packs): 257.2 kWh (231.5 kWh usable) @ 819.2 V nominal
Scalability — hybrid: Up to 16 clusters in parallel · up to 10 hybrid inverters in parallel, on- and off-grid (max. 800 kW with 80 kW units)
Scalability — PCS: Up to 16 clusters per PCS · up to 2.5 MW with five STS modules (25 × 100 kW or 20 × 125 kW PCS)
Inverter matching: Hybrid: SUN-29.9/35/40/50K-SG01HP3-AU-BM3/BM4 or SUN-60/70/75/80K-SG02HP3-AU-EM6 · PCS: 100/125 kW PCS + MPPT + STS
Accessory kit (one required per cluster): BOS-B-AP-B for a hybrid inverter · BOS-B-AP-A for the 100/125 kW PCS
Largest cluster in Deye's AU collocation table: 13 packs (BOS-B208) on SUN-50K-SG01HP3 · 15/16 packs (BOS-B240/256) on SUN-60K-SG02HP3
Packs per cluster on a PCS: 14–16 on-grid · 15–16 off-grid · confirm clusters under 16 packs with Suncloud (see the PCS page)
Recommended charge/discharge current: 157 A
Max. charge/discharge current: 180 A
Recommended depth of discharge: 90%
System dimensions (W×H×D): 2150 × 1305 × 800 mm (AU brochures, 2026) · 2150 × 1136 × 800 mm in Deye's EU brochures (2025)
System weight (approx.): ≈2240 kg (max. configuration)

General

Operating temperature: Charge 0–55 °C · Discharge −20–55 °C
Storage temperature: 0–35 °C
Thermal management: Smart fan cooling
Status indicator: Yellow: battery high-voltage power on · Red: battery system alarm
Communication port: TCP / RS485 / CAN
Humidity: 5%–85%
Altitude: ≤3000 m
IP rating: IP20
Installation location: Rack mounted (indoor)
Cycle life: ≥6000 (25 °C ± 2 °C, 0.5C/0.5C, 70% EOL)
Certification: CE / IEC62619 / IEC62040 / UN38.3
Warranty period: 10 years per Deye datasheet — confirm terms with Suncloud

Highlights

From one hybrid inverter to 2.5 MW — 16.08 kWh LFP packs build clusters from 80 to 257 kWh (5–16 packs). Up to 16 clusters run in parallel, with up to 10 hybrid inverters in parallel, or up to 2.5 MW on Deye’s PCS system.
Flexible architecture — pairs with Deye SUN-29.9–50K-SG01HP3 and SUN-60–80K-SG02HP3 hybrid inverters, or the modular 100/125 kW PCS + MPPT + STS system with integrated EMS and under-10 ms on/off-grid switchover.
Cobalt-free LiFePO4 with an independent BMS for optimal charge distribution and extended life; smart fan cooling, −20 °C to 55 °C discharge range.
≥6000-cycle life at 90% DoD (25 °C ± 2 °C, 0.5C/0.5C, 70% end-of-life).

Cluster models

BOS-B80 · B96 · B112 · B128 · B144 · B160 · B176 · B192 · B208 · B224 · B240 · B256 Pro-A3

System components

Each cluster is one BOS-B-PDU-2-A control box, 5–16 BOS-B-Pack16-A3 packs and one accessory kit: BOS-B-AP-B for a hybrid inverter or BOS-B-AP-A for the 100/125 kW PCS.

Outdoor and PCS systems

Outdoor sites: see the BOS-B Pro-A3 Outdoor Solution. It uses IP55 BOS-B80 Pro-A3-Cabinet enclosures and its own cabinet versions of the pack and control box. It pairs with an SG01HP3 hybrid inverter only, never a standalone PCS.
PCS systems: see the 100/125 kW PCS + MPPT + STS page for the PCS battery window, cluster sizes and wiring rules. PCS projects use this indoor rack.

Figures are from the Deye BOS-B Pro-A3 + Hybrid Solution brochure (AU, V1.0, 2026-08-13; its title says 29.9–125 kW, but it covers the 29.9–80 kW hybrids only), the BOS-B Pro-A3 Solution Series brochure for the 100–125 kW PCS (AU, V1.0, 2026-09-03), the BOS-B Pro-A3 user manual (EU/AU, V08, 2026-08-10) and Deye’s AU indoor/outdoor configuration list (V1.0, 2026-09-10). The pack weight (126 kg), system dimensions and system weight follow the two AU brochures, which agree. Deye’s earlier EU brochures (2025-08-07 and 2025-12-02) print the system dimensions as 2150 × 1136 × 800 mm (W×H×D) and 123 kg per pack. The V08 manual prints the same three numbers under a W×D×H heading. The PCS pack counts are from the AU PCS brochure. The 157 A recommended current is from Deye’s earlier EU brochure (V1.0, 2025-08-07); the newer documents print only the 180 A maximum. Confirm the configuration, the installed dimensions and the warranty terms with Suncloud before quoting.