Sigenergy SigenStack Battery Controller 157A | BC M2-0.5C-BST

Description

The Sigenergy SigenStack BC M2-0.5C-BST is the battery controller that sits at the top of the Main stack in a SigenStack commercial and industrial (C&I) battery system. It manages the DC power and communications between the BAT 12.0 battery modules and a Sigen C&I Hybrid Inverter, and the BST variant adds an integrated DC-DC boost converter module.

It is rated for a nominal 157 A battery charge/discharge current at 0.5C, 180 A maximum output and input current and an operating range of 550 to 1,100 V DC, with CAN communication to the inverter. The whole SigenStack system is IP66 rated for indoor or outdoor siting, with smart air cooling and an aerosol, smoke-sensor and exhaust fire suppression system.

157 A

Nominal charge/discharge current

180 A

Max. output / input current

550–1,100 V

DC operating voltage range

1–7

BAT 12.0 modules per stack

4–21

Modules per inverter (up to 253 kWh)

IP66

System ingress protection

How many stacks and modules are allowed?

1 to 7 BAT 12.0 modules on the Main stack and 1 to 7 on every Sub stack, with 4 to 21 modules connected to each inverter. A full 21-module, 253 kWh system is therefore three stacks of seven: one Main stack carrying this controller plus two Sub stacks. One controller is used per system, on the Main stack only.

When the BST version is the right controller

Sigenergy specifies the BC-BST where the rated AC line voltage is above 400 V, in any PV (solar) plus storage system, with a Sigen PV HYB series inverter in pure storage, and with a Sigen PV HYA series inverter in pure storage when the system has 19 modules or fewer. The standard BC M2-0.5C is reserved for pure storage on a HYA inverter with 20 or 21 modules. If in doubt, specify the BST.

Safety: heavy, high-voltage DC equipment

Operating voltage reaches 1,100 V DC and each BAT 12.0 module weighs 105 kg. Installation and commissioning must be carried out by a competent, qualified electrician to BS 7671, the Sigenergy installation guide and local fire-protection requirements, with G98/G99 notification to the network operator as applicable. A lifting tool is required from the fourth battery module upwards.

Key features

Integrated DC-DC boost module

The BST variant includes a DC-DC boost converter module, which is what makes it the controller of choice for PV plus storage (DC-coupled) systems and for systems of 19 modules or fewer.

157 A nominal, 180 A maximum

157 A nominal battery charge/discharge current with 180 A maximum output and maximum input current between the controller and inverter.

Wide 550 to 1,100 V window

An operating voltage range of 550 to 1,100 V DC covers the voltages produced by 4 to 21 stacked battery modules.

CAN communication

CAN communication to the Sigen C&I Hybrid Inverter series, with an 8-core shielded twisted pair signal cable (EIA/TIA 568B) up to 50 m.

Pack-level safety

SigenStack provides pack-level safety protection and precise thermal runaway control, with aerosol fire suppression, a smoke sensor and an exhaust system, and active balancing at pack level.

IP66, floor standing

The system is IP66 rated with smart air cooling, an operating range of -20 to 55 °C and 0 to 100 % relative humidity, installed floor standing on a non-combustible base.

Stack sizing (Main stack with this controller)

Figures below are for one Main stack: Base MAIN, BC controller and the stated number of BAT 12.0 modules. Width is 770 mm and depth 363 mm in every case. Add Sub stacks (Base SUB, Cover and modules) to grow the system.

Modules in stack

Energy

Total weight

Total height

4

48.24 kWh

500 kg

1,643 mm

5

60.30 kWh

605 kg

1,943 mm

6

72.36 kWh

710 kg

2,243 mm

7

84.42 kWh

815 kg

2,543 mm

Technical specifications

Product details

Manufacturer

Sigenergy

Model

SigenStack BC M2-0.5C-BST (abbreviated BC-BST)

Function

Battery controller including DC-DC boost converter module, mounted on the Main stack

Charge/discharge rate

0.5C

Compatible inverter

Sigen C&I Hybrid Inverter series

Electrical

Nominal battery charge/discharge current

157 A

Max. output current (to inverter)

180 A

Max. input current (from inverter)

180 A

Operating voltage range

550 to 1,100 V DC

Communication

CAN

Ports

Disconnecting switch, power ports BAT+ and BAT-, communication port COM, ON/OFF power button

Mechanical

Weight

60 kg

Dimensions (W / H / D)

770 / 248 / 363 mm

Installation method

Floor standing, on Base MAIN at the top of the Main stack

System configuration (SigenStack)

Battery module

SigenStack BAT 12.0, LiFePO4, 314 Ah cell, 12.06 kWh, 105 kg

Modules per stack

1 to 7

Modules per system

4 to 21 (max. 253 kWh)

Base for this controller

SigenStack Base MAIN-0.5C

Base and top cover for Sub stacks

SigenStack Base SUB-0.5C with SigenStack Cover

Environmental and compliance (SigenStack system)

System ingress protection

IP66

Operating temperature

-20 to 55 °C

Storage temperature

-25 to 60 °C

Relative humidity

0 % to 100 %

Max. operating altitude

4,000 m (derating from 2,000 m)

Cooling

Smart air cooling

Noise

Below 65 dB

Fire suppression

Aerosol, smoke sensor and exhausting system

Standards

IEC/EN 60730-1, UN 38.3, IEC/EN 62619, IEC/EN 63056, IEC/EN 62040, UL9540A

Installer-supplied cables (per Sigenergy installation guide)

Base MAIN PE cable

Outdoor single-core copper, at least 25 mm²

DC cable, inverter to controller

Outdoor single-core copper, 1,500 V DC rated, 70 to 120 mm², cable OD 11 to 22 mm, up to 50 m per cable

Signal cable, inverter to controller

Outdoor shielded twisted pair, 8 core, EIA/TIA 568B, conductor 0.13 to 0.2 mm², cable OD 4 to 7.5 mm, up to 50 m

What you need to complete a SigenStack system

✓

This controller (BC M2-0.5C-BST) on the Main stack, one per system

✓

SigenStack Base MAIN-0.5C to carry the controller and the first stack of modules

✓

SigenStack BAT 12.0 battery modules, 4 to 21 per inverter, all with the same part number

✓

Base SUB-0.5C and a SigenStack Cover for each additional Sub stack

✓

A Sigen C&I Hybrid Inverter and the installer-supplied cables listed above

Supplied separately

This listing is for the battery controller only. Base, battery modules, Sub stack bases, covers and inverter are supplied separately. Keep every component in the same 0.5C rate class.

Frequently asked questions

How many battery modules can I fit on a stack?

The installation guide allows 1 to 7 BAT 12.0 modules per stack, on both the Main stack and each Sub stack. A complete system needs 4 to 21 modules per inverter, which is a maximum of 253 kWh.

When must I use the BST controller instead of the standard BC?

Use the BST for PV plus storage systems, where the AC line voltage is above 400 V, with a HYB inverter in pure storage, and with a HYA inverter in pure storage up to 19 modules. The standard BC M2-0.5C is for pure storage on a HYA inverter with 20 or more modules.

Can I mix different battery module versions in one system?

Sigenergy advises that all BAT 12.0 modules in the same system share the same part number. Check that the first eight digits of the part number on the module match before stacking.

What cables do I need to supply?

You supply the PE cable (at least 25 mm²), the DC power cable between the inverter and controller (70 to 120 mm², 1,500 V DC rated) and an 8-core shielded signal cable. Single cable runs are limited to 50 m.

Where can the system be installed?

The SigenStack system is IP66 rated for indoor or outdoor use. It needs a level, solid, non-combustible base such as concrete, positioned at least 200 mm above ground level, with at least 1,500 mm clearance in front for lifting equipment, and at least 500 m from salt or acid corrosion sources.

Does this controller include the base or battery modules?

No. The listing is the controller only. You also need Base MAIN-0.5C, BAT 12.0 modules and a Sigen C&I Hybrid Inverter, plus Base SUB-0.5C and a Cover for any Sub stack.

BTU Calculator

BTU & WATT Calculator

Room Dimensions

Length (in m):

Width (in m):

Height (in m):

Room Type

Living Room

Bedroom

Kitchen

Bathroom

Conservatory

Hallway

Glazing Type

Single Glazed

Double Glazed

Triple Glazed

External Walls

0 Wall

1 Wall

2 Walls

3 Walls

4 Walls

Insulation Level

Poor

Average

Good (New Build)

Calculate

Required Heating

0

Watts

0

BTUs