SAJ B2-20.0-HV5
Description
25 kW continuous discharge with 512 V high-voltage efficiency.
SAJ B2-25.0-HV5 is the flagship 25.0 kWh high-current high-voltage LFP battery tower delivering up to 50 A continuous discharge (25 kW power output) at 512 V nominal, engineered for heavy commercial workshops, agricultural facilities, and off-grid microgrids.
25 kW Continuous Battery Power Delivery (50 A)
Supplies maximum battery discharge rate to run industrial power tools, compressors, and complete facility sub-panels.
512 V Maximum Single-Stack Voltage Ceiling
Operates at the upper ceiling of high-power hybrid inverters (448–576 V) to deliver peak round-trip efficiency.
22.50 kWh Usable Storage Reserve
Maximum single-column capacity delivers full-day energy independence and multi-hour industrial peak shaving.
Cable-Free Single-Column Stacking
Consolidates 25.0 kWh into a single 1.57 m stack without consuming extra floor space.
More product details
Operating at 512 V nominal with 50 A continuous throughput allows commercial inverters to draw 25 kW directly from storage with minimal step-up voltage conversion losses.
- Delivers up to 25 kW continuous DC discharge across 5 modules (512.0 V @ 50 A).
- 160S series LFP cell string delivers maximum round-trip electrical efficiency across all seasons.
- Cell-level thermal sensors and active balancing prevent localized degradation across thousands of daily cycles.
SAJ
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4 models
Usable energy
24 kWh
9.6 kWh
14.4 kWh
19.2 kWh
Nominal energy
25.0 kWh
10.0 kWh
15.0 kWh
20.0 kWh
Nominal voltage
512 V
204.8 V
307.2 V
409.6 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
262.5 kg
105 kg
157.5 kg
210 kg
25.0 kWh capacity consolidated in a single vertical footprint.
Standing 1.57 m tall on its heavy-duty base pedestal, this 5-module tower delivers extreme volumetric energy density while remaining securely anchored against the wall. Internal busbar contacts eliminate 5 separate sets of external high-voltage cables and conduit runs. Integrated wall-anchoring bracket provides certified seismic and mechanical stability for the full 273.5 kg stack. IP65 rated enclosure certified for unheated basements, technical utility rooms, and sheltered outdoor alcoves (-10 to +50 °C).
H2-listed battery path.
H2 + BC2 + B2/BU2 is listed; HS3 + B2 stays closed.
15.4 kW rated at 30 A.
Rated power scales with the full stack; current stays at 30 A.
Technical data
The apex high-current commercial storage flagship for uncompromised off-grid autonomy and peak shaving.
512 V commercial-grade battery tower delivering 25 kW continuous power output.
Maxing out SAJ's high-current B2-HV5 lineup, this 25.0 kWh tower stacks five 50 A modules to reach 512 V nominal with full 50 A continuous discharge. It pushes up to 25,000 W of instantaneous battery power to sustain heavy commercial workshops, EV charging hubs, and large rural estates completely off-grid with zero grid purchases.
- Nominal Storage
- 25.0 kWh
- Peak Operating Voltage
- 512.0 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
- 5
- Rated energy (kWh)
- 25.0
- Usable energy (kWh)
- 24
- Rated power (W)
- 15360
- Nominal voltage (V)
- 512
- Operating voltage (V)
- 448 - 576.0
- Max. charge current (A)
- 30
- Max. discharge current (A)
- 30
Mechanical
- Module stack dimension (H x W x D mm)
- 1305 x 626 x 365
- Module stack weight (kg)
- 262.5
- 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 B2-25.0-HV5 belongs in, what to verify before quoting, and when another model is the better pick.
Project scenario
High-Power Commercial Facilities & Large Estates (25–40 kWp Solar Arrays)
Metal fabrication workshops, grain processing plants, or luxury estates running three-phase machinery requiring 25 kW continuous battery power.
50 A continuous discharge delivers full 25 kW power from a single column, providing the depth (22.5 kWh usable) needed to shave peak demand charges.
- BoundaryIf the facility's overnight energy storage demand is under 18 kWh, step down to save capital expenditure. ---
What Linker confirms with you
- If the facility's overnight energy storage demand is under 18 kWh, step down to save capital expenditure. ---
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
What is the maximum continuous power output of the B2-25.0-HV5?
Full 25.0 kW continuous DC power (512 V @ 50 A). At nominal 512.0 V and 50 A continuous current ($P = V \times I$), the tower delivers approx. 25.6 kW continuous DC discharge power, fully unlocking the maximum discharge speed of an SAJ H2-25K or H2-30K-DE hybrid inverter.
What is the total assembled height and weight of the 5-module HV5 tower?
1,566 mm height (approx. 1.57 m); 273.5 kg total weight. * Total Height: 1,566 mm on its leveling pedestal. * Total Weight: 273.5 kg (approx. 603 lbs). * Mandatory Installation Step: Secure the included top wall-mounting bracket into solid concrete or masonry walls to prevent tipping.
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.
