SAJ B2-10.0-HV5
Description
15 kW continuous discharge with enhanced thermal dissipation.
SAJ B2-15.0-HV5 is a 15.0 kWh high-current high-voltage LFP battery tower delivering up to 50 A continuous discharge (15 kW continuous output across three modules), engineered to power heavy multi-zone heat pumps, commercial workshops, and SAJ H2 hybrid inverters.
15 kW Continuous Power Output (50 A)
Full-speed power delivery effortlessly covers heavy domestic inductive surges and continuous winter heating loads.
307.2 V Inverter Efficiency Sweet-Spot
Placed right in the center of three-phase inverter DC-DC efficiency curves, minimizing conversion losses.
Heavy-Duty High-Capacity BU2-HV5 Cells (52.5 kg)
Enhanced thermal cooling channels maintain low operating temperatures under heavy 50 A cycling.
Cable-Free Vertical Column Stacking
Consolidates 15.0 kWh into a single 1.04 m column without consuming extra floor space.
More product details
Delivering 15 kW of continuous discharge from a compact battery creates heavy thermal stress. The B2-15.0-HV5 incorporates enhanced internal cooling channels and heavy copper interconnects to sustain 50 A continuous power.
- Delivers up to 15 kW continuous DC discharge across 3 modules (307.2 V @ 50 A).
- Heavy-duty 52.5 kg chassis provides robust thermal mass and structural heat dissipation.
- Cell-level thermal sensors and active balancing prevent localized degradation across thousands of daily cycles.
SAJ
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4 models
Usable energy
14.4 kWh
9.6 kWh
19.2 kWh
24 kWh
Nominal energy
15.0 kWh
10.0 kWh
20.0 kWh
25.0 kWh
Nominal voltage
307.2 V
204.8 V
409.6 V
512 V
Max. charge current
30 A
30 A
30 A
30 A
Max. discharge current
30 A
30 A
30 A
30 A
Ingress protection
IP65
IP65
IP65
IP65
Weight
157.5 kg
105 kg
210 kg
262.5 kg
15 kWh capacity in an ultra-lean 0.23 m² floor footprint.
Stacking 3 modules vertically reaches a clean 1.04 m column height, preserving valuable workshop and garage floor space while isolating cells from floor moisture. Internal busbar contacts eliminate external high-voltage jumper cables and conduit runs. Integrated master DC circuit breaker isolates the stack automatically in sub-seconds during fault conditions. IP65 rated enclosure certified for unheated basements, technical utility rooms, and sheltered outdoor alcoves (-10 to +50 °C).
H2 and HS2 listed.
SAJ lists H2 + BC2 + B2/BU2; HS2 takes up to five BU2 modules on 180-600 V.
30 A through the climb.
Charge and discharge current stay at 30 A as modules are added.
Technical data
Heavy-duty high-voltage energy storage engineered for high-power residential heating and commercial workshops.
307.2 V high-current sweet-spot delivering 15 kW continuous power for heat pumps.
Three stacked 50 A modules provide 15.0 kWh of storage across a 268.8–345.6 V working window. Operating at the efficiency sweet spot of three-phase hybrid inverters, this tower delivers up to 15,000 W of continuous discharge power to sustain multi-zone heat pumps, commercial machine tools, and rapid EV charging with zero grid draw.
- Nominal Storage
- 15.0 kWh
- Optimal Voltage Bus
- 307.2 V
- High-Rate Throughput
- 50 A
- All-Weather Build
- IP65
Type & Configuration
- Type
- High-voltage residential battery system, B2 Series (HV5)
- Battery module
- BU2-5.0-HV5 (32S1P, 102.4 V / 50 Ah)
- Control module
- BC2-HV1 (as printed in the HV5 table)
- Control module dimension (H x W x D mm)
- 220 x 626 x 365
- Control module weight (kg)
- 11
Energy & Electrical
- Number of modules
- 3
- Rated energy (kWh)
- 15.0
- Usable energy (kWh)
- 14.4
- Rated power (W)
- 9216
- Nominal voltage (V)
- 307.2
- Operating voltage (V)
- 268.8 - 345.6
- Max. charge current (A)
- 30
- Max. discharge current (A)
- 30
Mechanical
- Module stack dimension (H x W x D mm)
- 783 x 626 x 365
- Module stack weight (kg)
- 157.5
- Control module dimension (H x W x D mm)
- 220 x 626 x 365
- Control module weight (kg)
- 11
Environment
- Ingress protection
- 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
- Communication
- CAN
Project fit
Where this model fits.
Scenarios that show which projects the SAJ B2-15.0-HV5 belongs in, what to verify before quoting, and when another model is the better pick.
Project scenario
Large Electrified Residences & Commercial Workshops (12–18 kWp Solar Arrays)
Properties running multi-zone heat pumps, commercial tools, or EV chargers requiring up to 15 kW continuous discharge power from storage.
50 A throughput delivers full 15 kW continuous power, while 13.50 kWh usable capacity provides the depth needed to sustain operations overnight.
- BoundaryIf the facility requires deeper overnight energy storage (> 15 kWh) to cover multi-day winter heating or multi-shift operations, step up to the 20.0 kWh (4-module) or 25.0 kWh (5-module) tower. ---
What Linker confirms with you
- If the facility requires deeper overnight energy storage (> 15 kWh) to cover multi-day winter heating or multi-shift operations, step up to the 20.0 kWh (4-module) or 25.0 kWh (5-module) tower. ---
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
Why choose the B2-15.0-HV5 over the standard B2-15.0-HV1?
HV5 delivers 15 kW continuous discharge (50 A); HV1 delivers 9 kW (30 A). * B2-15.0-HV1: Standard 30 A residential tower (max output ~9 kW). * B2-15.0-HV5: High-throughput 50 A tower (max output ~15 kW), specifically designed to pair with SAJ H2-15K/20K inverters and drive heavy three-phase motor loads without current throttling.
What is the total assembled height and weight of the 3-module HV5 tower?
1,044 mm height; 168.5 kg total weight. * Total Height: 1,044 mm (approx. 41 inches) on its leveling pedestal. * Total Weight: 168.5 kg (approx. 371 lbs).
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.
