Control Box (control unit) DEYE GB-L+BASE

This is not a battery and it does not store energy. It is the part at the base of the Deye GB-L battery tower, the one that coordinates all the others: it contains the main BMS, the contactors that connect and disconnect the bank, the electrical protections and the communication link with the inverter. Without it, the battery modules are just boxes that cannot be used. The set also includes the base on which the tower sits.

On one tower, between 2 and 6 GB-LM4.0 modules of 4.09 kWh each are stacked, which means capacities between about 8.2 and 24.6 kWh - from a reserve for the essential circuits of the house to a bank that can cover the evening and night consumption of a home. The modules are connected through contacts integrated in the stacking structure, without manual cables between them, which shortens installation and reduces the number of contact points that can loosen over time. The control box weighs about 14.5 kg, and the set with the base reaches approximately 24 kg. Being IP65, it can also be installed outdoors, and the integrated display shows the system status and any alarms, without the need for a laptop or an app.

Model GB-LBS + BASE, working range 120-750 Vdc, rated charging/discharging current 40 A, maximum 50 A. Compatible modules GB-LM4.0 (4.09 kWh, 102.4 V, 40 Ah), 2-6 modules per tower, resulting system voltage 204.8-614.4 V, capacity 8.18-24.56 kWh. CAN and RS485 communication, status and alarm display, remote firmware update. Box dimensions 540 x 385 x 110 mm, protection degree IP65.

Who it suits

Suitable for a home that is building a Deye GB-L high-voltage battery bank between 8 and 24 kWh, or for replacing the control unit in an already existing GB-L installation.

Terms explained

• Control unit (master BMS): The box that commands the whole battery group: it starts and stops the link with the inverter, measures the voltages and the current and stops everything if a problem appears.
• IP65: A sealing rating: fully protected against dust and resistant to water jets, so it can also be mounted outside, on the wall.
• 120-750 Vdc: The direct voltage range in which the unit can work; it changes depending on how many battery modules are stacked in the tower.

Technical specifications

Recommended applications

• Bringing a Deye GB-L high-voltage battery tower into operation
• Replacement or spare part for existing GB-S systems
• Building residential HV banks between 8 and 24 kWh
• Outdoor installations, thanks to the IP65 protection degree

Warranty

10 years

Technical details

Specifications confirmed from the manufacturer's datasheet

The Deye GB-L control box, code GB-LBS, together with the base forms the management part of the high-voltage battery towers of the GB-L family. It is not a battery, but the unit that contains the master BMS, the contactors and the protections of the battery bank, as well as the interface to the inverter.

The voltage range in operation is 120 - 750 Vdc, and the rated charging and discharging current is 40 A, with a maximum of 50 A. These values correspond to the GB-LM4.0 modules of 4.09 kWh, which have 102.4 V and 40 Ah each. Between 2 and 6 modules can be stacked on one tower, which means capacities between about 8.2 and 24.6 kWh and system voltages between 204.8 and 614.4 V.

The modules are connected without cables between them, through connectors integrated in the stacking structure, which reduces the installation time and the number of contact points. The base ensures the positioning and the distance from the ground.

The unit communicates through CAN and RS485 and has a display for the system status and alarms, with the possibility of remote firmware update. The dimensions of the control box are 540 x 385 x 110 mm, with a weight of about 14.5 kg, and the set with the base reaches approximately 24 kg. The protection degree is IP65, which allows outdoor installation.