Description

The Dyness SBDU200 is the controller of the STACK314 system (BDU, in our shop – the BMS controller): it links the module string to the inverter, protects it with a DC breaker and passes the battery data over CAN or RS485. Every STACK314 system needs one controller – it stands at the bottom on the base, and 3–15 modules are stacked on top of it. The controller is bought separately when a second parallel system is built or the existing one is replaced.

What the controller does

The SBDU200 operates in the 134.4–864 V range and passes up to 200 A of continuous current, so the same controller suits all configurations from 3S to 15S. It collects the module BMS data, protects against overcharge, over-discharge, overcurrent and too high or too low temperature, balances the cells and shows the state of charge on an LED indicator. The integrated Wi-Fi (802.11 b/g/n) and Bluetooth 5 module connects the system to the Dyness app – through it the warranty is registered, the status monitored and the firmware updated.

Connections and communication

On the front – a DC breaker (main switch with short-circuit protection), power-on and wake buttons, two Wi-Fi antennas, DC+ and DC− sockets, a grounding point. For the inverter – two RJ45 ports (CAN and RS485; pins 1–2 RS485, 4–5 CAN), for parallel connection – "Parallel in" and "Parallel out" RJ45 ports, and a LAN port reserved for certain high-power inverters. Up to 12 systems are paralleled only with the SBDU200 and a separate busbar.

Package and installation

Package A: controller 770 × 425 × 160 mm (19.2 kg), base 770 × 425 × 133 mm, 2 wall brackets with fixing bolts, a 120 Ω CAN resistor, CAN and RS485 communication cables (2 m), 50 mm² power cables (2.05 m, red and black), OT4-6 lugs, a warranty card and a quick installation guide. IP20, indoor installation; grounding resistance no more than 100 mΩ.

Safety and warranty

The manufacturer's documentation states CE-EMC and CE-RED conformity, and the radio operates in the 2.4 GHz band. The manufacturer's warranty is 10 years under the Dyness warranty terms; to register the warranty the controller is connected to the internet through the app.

Technical specifications

Voltage

134.4–864 V DC operating

Current

200 A max. continuous

Communication

2 × RJ45 CAN/RS485 to inverter, Parallel in/out, LAN; Wi-Fi + Bluetooth 5

Features

DC breaker, BMS protections, cell balancing, LED SOC, OTA, up to 12 systems in parallel

Dimensions (W×D×H)

770 × 425 × 160 mm (controller); base 770 × 425 × 133 mm

Weight

19.2 kg

Protection

IP20, indoor; CE-EMC, CE-RED

Mounting

On the base, below the modules; wall brackets included

Compatibility

Only for STACK314 S51314 modules (3–15 pcs); one controller per system

In the box

Controller, base, brackets, 120 Ω resistor, CAN/RS485 and 50 mm² power cables

Warranty

10 yr. under Dyness warranty terms