BOS-G installation essentials
Rack, cluster control box, indoor rating and the AU-required external DC protection for a BOS-G high-voltage battery.
The BOS-G is a 19-inch rack high-voltage battery: stack 5.12 kWh modules with a high-voltage cluster control box. Key points that catch people out on AU installs:
Mechanical
- Use the matching rack — 3U-HRACK holds 12 modules, 3U-LRACK holds 8 — plus the HVB750V/100A cluster control box at the top of each cluster.
- Modules in series set the capacity: 3–12 modules → BOS-G15 … BOS-G60 (15.36 → 61.44 kWh), system voltage 153.6 → 614.4 V.
Indoor only
BOS-G is rated IP20 — it is an indoor product (utility room / dedicated battery room). It is not for outdoor mounting on its own. If the site needs outdoor, put the battery in a Deye outdoor cabinet: the IP55 BOS-G55-Cabinet or the IP54 BOS-G50-Cabinet — see the BOS-G outdoor solution for the builds, kits and siting rules.
AU electrical — external DC protection is required
For the Australian market the BOS-G installation manual requires an external DC overcurrent protection and isolation device that isolates both poles between the battery and the inverter.
- Size the DC breaker to the inverter’s off-grid peak behaviour, not just steady current — Deye hybrids briefly run 2× rated power for ~10 s, so an under-rated breaker nuisance-trips. A 200 A DC device is the typical spec for large single-inverter clusters; confirm for your configuration.
- Battery power cable ships with the BOS-G package (commonly 4 AWG × 2, one per BMS input).
Comms & commissioning
- Battery talks to the inverter over CAN 2.0 / RS485 — land it on the inverter’s BMS port.
- Bring the cluster up, confirm all modules report, then set battery type and current limits in DeyeCloud.
Figures are indicative. Always size protection and conductors per the BOS-G installation manual and AS/NZS 5139 / AS/NZS 3000, and have a licensed electrician verify the design.
