SAJ B2-5.0-HV1
Description
Comprehensive cell-level monitoring with integrated DC isolation.
SAJ BC2-HV1 is the high-voltage master battery management controller and structural base pedestal that manages active cell balancing, thermal regulation, and DC isolation for 1 to 5 stacked SAJ B2 battery modules.
Integrated High-Voltage Master BMS
Continuously monitors individual cell voltages, string temperatures, and insulation resistance across up to 5 stacked modules.
Dual 30 A / 50 A Current Compatibility
Natively controls both standard B2-HV1 (30 A) and high-throughput B2-HV5 (50 A) battery columns.
IP65 Heavy Weatherproof Protection
Heavy-duty die-cast enclosure certified for damp basements, garages, and sheltered outdoor alcoves (-10 to +50 °C).
Direct Cable-Free Busbar Mating
Eliminates external high-voltage jumper cables, passing power and CAN communication internally through mating terminals.
More product details
The BC2-HV1 centralizes high-voltage system protection, actively communicating with sub-BMS units inside each BU2 module to balance cell states and execute sub-second fault isolation.
- Real-time monitoring of cell voltages, string temperatures, and ground insulation resistance.
- Integrated motorized DC circuit breaker automatically isolates the stack during overcurrent, short circuit, or thermal faults.
- Direct CAN protocol handshake provides real-time state-of-charge (SoC) telemetry to SAJ hybrid inverters.
SAJ
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4 models
Usable energy
—
4.5 kWh
4.5 kWh
4.8 kWh
Nominal energy
—
5.0 kWh
5.0 kWh
5 kWh
Nominal voltage
—
102.4 V
102.4 V
450 V
Cell chemistry
—
LiFePO4
LiFePO4
LiFePO4
Max. charge current
30 A
30 A
30 A
7.9 A
Max. discharge current
30 A
30 A
30 A
7.9 A
Ingress protection
IP65
IP65
IP65
IP65
Weight
11 kg
50.5 kg
52.5 kg
52 kg
Rugged floor-mounted pedestal with internal busbar mating.
Designed as the structural baseplate of the vertical battery column, the BC2 provides precision leveling feet and self-aligning internal high-voltage contacts. Internal push-in busbar terminals pass high-voltage power and communication directly between modules without external cables. Engineered floor-level stand isolates battery modules from concrete floor moisture and standing condensation. Supports vertical stacking of up to 5 modules (over 270 kg) with integrated wall-anchoring brackets.
Same head to 25 kWh.
Add modules later; the controller rating already covers five bricks.
IP65, CAN, 30 A.
Outdoor-rated head, charge 0-50 C, discharge -10-50 C.
Technical data
Centralizing high-voltage safety, active cell diagnostics, and plug-and-play stacking in a single base.
Master BMS controller and high-voltage safety gateway for SAJ B2 battery columns.
Serving as the primary management unit for SAJ B2-HV1 and B2-HV5 high-voltage battery stacks, the BC2-HV1 coordinates cell balancing, thermal regulation, and high-voltage DC isolation across 1 to 5 stacked modules (5 to 25 kWh). It mounts cleanly at the base or top of the stack with full IP65 environmental sealing, communicating directly with SAJ hybrid inverters via high-speed CAN protocols.
- Wide Voltage Bus
- 89.6–576 V
- High-Rate Throughput
- 30 A / 50 A
- Plug-and-Play
- Auto-Detect
- All-Weather Enclosure
- IP65
Type & Configuration
- Type
- Control module, B2 Series high-voltage battery system
Mechanical
- Dimension (H x W x D mm)
- 220 x 626 x 365
- Weight (kg)
- 11
Environment
- Communication (system)
- CAN
- Ingress protection (system)
- IP65
- Protection class
- I
- Mounting
- Wall-mounted (optional) / ground-mounted
- Operating temperature range
- Charging 0 ~ 50 C; discharging -10 ~ 50 C
- Ambient humidity
- 0 ~ 95% non-condensing
- Cooling method
- Natural convection
Project fit
Where this model fits.
Scenarios that show which projects the SAJ BC2-HV1 belongs in, what to verify before quoting, and when another model is the better pick.
Project scenario
Required Base for Any New SAJ B2-HV1 or B2-HV5 Battery Installation (5–25 kWh)
Mandatory foundation unit whenever configuring a new SAJ B2 battery tower with 1, 2, 3, 4, or 5 battery modules.
One BC2-HV1 is required per battery column to house the master BMS and provide physical floor mounting.
What Linker confirms with you
- Confirm this model against the adjacent rating in the same family
Documents
SAJ B2 HV1 / HV5 Series high-voltage battery datasheet (AU, EN) SAJ B2 Series (5.0-25.0) HV1/HV5 Battery Datasheet (EN, AU)Product questions
Can a single BC2-HV1 base control more than 5 battery modules?
No. Maximum 5 modules (25.0 kWh) per single tower. The BC2-HV1's internal master BMS firmware and DC voltage ceiling (576 V DC) are engineered to support a maximum of 5 modules in series (25.0 kWh / 512 V nominal). To expand capacity beyond 25 kWh, you must install a second complete tower (including its own BC2 base) and connect the two towers in parallel using an external high-voltage DC combiner box.
Is the BC2-HV1 compatible with both BU2-5.0-HV1 (30 A) and BU2-5.0-HV5 (50 A) modules?
Yes. Universal master controller for both HV1 and HV5 series. The BC2-HV1 master controller detects the attached module series automatically, operating at 30 A continuous current when paired with standard HV1 bricks and unlocking full 50 A continuous current when paired with high-throughput HV5 bricks.
Approved pairings
SAJ CH3-100K-T8Item number DLK-SAJ-CH3100KT8CB3-L261 and CB3-M20, through the CB3-HVC high-voltage cabinet. SAJ's CB3 datasheet states it directly: the battery is compatible with SAJ CH2 and CH3 series inverters. 60 to 260 kWh per cluster.
SAJ CH3-110K-T8Item number DLK-SAJ-CH3110KT8CB3-L261 and CB3-M20, through the CB3-HVC high-voltage cabinet. SAJ's CB3 datasheet states it directly: the battery is compatible with SAJ CH2 and CH3 series inverters. 60 to 260 kWh per cluster.
SAJ CH3-125K-T8Item number DLK-SAJ-CH3125KT8CB3-L261 and CB3-M20, through the CB3-HVC high-voltage cabinet. SAJ's CB3 datasheet states it directly: the battery is compatible with SAJ CH2 and CH3 series inverters. 60 to 260 kWh per cluster.
SAJ CH3-75K-T6Item number DLK-SAJ-CH375KT6CB3-L261 and CB3-M20, through the CB3-HVC high-voltage cabinet. SAJ's CB3 datasheet states it directly: the battery is compatible with SAJ CH2 and CH3 series inverters. 60 to 260 kWh per cluster.
SAJ CH3-80K-T6Item number DLK-SAJ-CH380KT6CB3-L261 and CB3-M20, through the CB3-HVC high-voltage cabinet. SAJ's CB3 datasheet states it directly: the battery is compatible with SAJ CH2 and CH3 series inverters. 60 to 260 kWh per cluster.
SAJ CH3-99.9K-T8Item number DLK-SAJ-CH3999KT8CB3-L261 and CB3-M20, through the CB3-HVC high-voltage cabinet. SAJ's CB3 datasheet states it directly: the battery is compatible with SAJ CH2 and CH3 series inverters. 60 to 260 kWh per cluster.
SAJ H2-10K-T3 (10 kW three-phase hybrid inverter)Item number DLK-SAJ-H210KT3B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ H2-12K-T3 (12 kW three-phase hybrid inverter)Item number DLK-SAJ-H212KT3B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ H2-15K-T3Item number DLK-SAJ-H215KT3B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ H2-20K-T3Item number DLK-SAJ-H220KT3B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ H2-25K-T3Item number DLK-SAJ-H225KT3B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ H2-30K-T3-DEItem number DLK-SAJ-H230KT3DEB2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ HS2-10K-T2-XItem number DLK-SAJ-HS210KT2XBU2-5.0-HV1/HV5, up to 5 battery modules. Battery window 180 to 600 V.
SAJ HS2-5K-T2-X (5 kW three-phase hybrid inverter)Item number DLK-SAJ-HS25KT2XBU2-5.0-HV1/HV5, up to 5 battery modules. Battery window 180 to 600 V.
SAJ HS2-6K-T2-XItem number DLK-SAJ-HS26KT2XBU2-5.0-HV1/HV5, up to 5 battery modules. Battery window 180 to 600 V.
SAJ HS2-8K-T2-XItem number DLK-SAJ-HS28KT2XBU2-5.0-HV1/HV5, up to 5 battery modules. Battery window 180 to 600 V.
