SAJ B2-15.0-HV5
Description
20 kW continuous discharge with enhanced thermal dissipation.
SAJ B2-20.0-HV5 is a 20.0 kWh high-current high-voltage LFP battery tower delivering up to 50 A continuous discharge (20 kW output across four modules), engineered for commercial workshops, large agricultural estates, and SAJ H2 commercial inverters.
20 kW Continuous Power Delivery (50 A)
Supplies commercial-grade power output to run heavy machinery, agricultural pumps, and residential heating buffers.
409.6 V High-Voltage Bus for Low Cable Stress
Higher operating voltage reduces internal current stress, keeping operating temperatures low during heavy continuous discharges.
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 Single-Column Stacking
Consolidates 20.0 kWh into a neat, vertical 1.3 m stack without consuming extra floor space.
More product details
Delivering 20 kW of continuous discharge from a compact battery creates heavy thermal stress. The B2-20.0-HV5 incorporates enhanced internal cooling channels and heavy copper interconnects to sustain 50 A continuous power.
- Delivers up to 20 kW continuous DC discharge across 4 modules (409.6 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.
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4 models
Usable energy
19.2 kWh
9.6 kWh
14.4 kWh
24 kWh
Nominal energy
20.0 kWh
10.0 kWh
15.0 kWh
25.0 kWh
Nominal voltage
409.6 V
204.8 V
307.2 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
210 kg
105 kg
157.5 kg
262.5 kg
20 kWh capacity in an ultra-lean 0.23 m² floor footprint.
Stacking 4 modules vertically reaches a clean 1.3 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).
12.3 kW rated at 30 A.
Rated power scales with the stack; current stays at 30 A.
Outdoor IP65 column.
Charge 0-50 C, discharge -10-50 C, CAN to the hybrid.
Technical data
Heavy-duty commercial energy storage engineered for high-throughput electrification and industrial workshops.
409.6 V high-voltage storage delivering 20 kW continuous power for large estates.
Four stacked 50 A modules deliver 20.0 kWh of heavy-duty storage at 409.6 V nominal across a 358.4–460.8 V window. Engineered for large properties, agricultural facilities, and multi-family homes, this tower delivers up to 20,000 W of continuous power to run commercial workshops and multi-split heat pumps during outages with zero grid draw.
- Nominal Storage
- 20.0 kWh
- High Operating Voltage
- 409.6 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
- 4
- Rated energy (kWh)
- 20.0
- Usable energy (kWh)
- 19.2
- Rated power (W)
- 12288
- Nominal voltage (V)
- 409.6
- Operating voltage (V)
- 358.4 - 460.8
- Max. charge current (A)
- 30
- Max. discharge current (A)
- 30
Mechanical
- Module stack dimension (H x W x D mm)
- 1044 x 626 x 365
- Module stack weight (kg)
- 210
- 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 B2-20.0-HV5 belongs in, what to verify before quoting, and when another model is the better pick.
Project scenario
Commercial Workshops & Agricultural Enterprises (20–30 kWp Solar Arrays)
Metal fabrication workshops, auto repair garages, or agricultural operations running three-phase machinery and seeking 20 kW battery discharge power.
50 A continuous throughput delivers full 20 kW power, while 18.00 kWh usable capacity buffers midday solar overproduction to shave peak evening demand charges.
- BoundaryIf the facility requires maximum single-column storage capacity (25.0 kWh / 22.5 kWh usable), step up to the 25.0 kWh (5-module) flagship tower. ---
What Linker confirms with you
- If the facility requires maximum single-column storage capacity (25.0 kWh / 22.5 kWh usable), step up to the 25.0 kWh (5-module) flagship 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 B2-20.0-HV5 over the standard B2-20.0-HV1?
HV5 delivers 20 kW continuous discharge (50 A); HV1 delivers 12 kW (30 A). * B2-20.0-HV1: Standard 30 A residential tower (max output ~12 kW). * B2-20.0-HV5: High-throughput 50 A tower (max output ~20 kW), specifically designed to pair with SAJ H2-20K/25K inverters and drive heavy three-phase motor loads without current throttling.
What is the total assembled height and weight of the 4-module HV5 tower?
1,305 mm height; 221.0 kg total weight. * Total Height: 1,305 mm (approx. 1.3 m) on its leveling pedestal. * Total Weight: 221 kg (approx. 487 lbs). * Structural Recommendation: Secure the included top wall-mounting bracket into solid masonry for seismic stability.
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.
