SAJ BU2-5.0-HV5
Description
Furniture-grade single-column integration with internal busbars.
SAJ BU3-5.0-TV2-PRO is a 5.0 kWh high-voltage LFP modular battery brick with an ultra-slim 17 cm profile and internal interlocking busbars, engineered to stack seamlessly beneath SAJ HS3 and AS3 All-in-One towers.
Native HS3 / AS3 Direct Interlocking
Fits directly beneath HS3 hybrid or AS3 AC-coupled inverter units without external DC conduits or wall brackets.
Ultra-Slim 17 cm Column Profile
Delivers 5.0 kWh while hugging the wall closely in residential garages and narrow utility hallways.
102.4 V High-Voltage Stepping
Stacks 1 to 5 units vertically (5.0 to 25.0 kWh) to meet domestic storage demands from daily baselines to multi-day heating buffers.
IP65 Ingress Protection
Robust environmental sealing protects power cells across -10 °C to +50 °C working temperatures.
More product details
Stacking directly beneath the inverter unit eliminates external high-voltage conduits, junction boxes, and messy communication patch leads.
- Internal push-in busbars pass high-voltage power and communication directly between inverter and battery modules.
- Eliminates exposed high-voltage DC wiring on garage and utility room walls, maximizing residential safety.
- Ultra-slim 17 cm profile preserves floor space in narrow domestic garages and utility corridors.
SAJ
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4 models
Usable energy
4.8 kWh
4.5 kWh
4.5 kWh
—
Nominal energy
5 kWh
5.0 kWh
5.0 kWh
—
Nominal voltage
450 V
102.4 V
102.4 V
—
Cell chemistry
LiFePO4
LiFePO4
LiFePO4
—
Max. charge current
7.9 A
30 A
30 A
30 A
Max. discharge current
7.9 A
30 A
30 A
30 A
Ingress protection
IP65
IP65
IP65
IP65
Weight
52 kg
50.5 kg
52.5 kg
11 kg
High thermal stability with integrated sub-BMS cell balancing.
Built with automotive-grade prismatic LFP cells in a 32S series configuration, each module features integrated sub-BMS electronics that report cell temperatures and voltages continuously to the top inverter unit. Cell-level thermal sensors and active balancing prevent localized degradation across thousands of daily cycles. Direct high-voltage operation (89.6–115.2 V) minimizes current stress and resistive heat losses during discharge. IP65 sealed enclosure protects power cells against humidity, dust, and coastal environments (-10 to +50 °C).
4.8 kWh usable.
5 kWh nominal LiFePO4 with a 450 V nominal window.
Wide temperature band.
Operating range -30 to +50 C, IP65, CAN to the hybrid.
Technical data
Furniture-grade ultra-slim energy storage engineered for residential living spaces.
5.0 kWh All-in-One modular battery brick designed for SAJ HS3 and AS3 towers.
Purpose-built as the native storage module for SAJ's HS3 and AS3 modular systems, the BU3-5.0-TV2-PRO delivers 5.0 kWh of LFP storage at 102.4 V nominal. Its slim 17 cm depth and direct interlocking busbars allow vertical stacking beneath the inverter, creating a seamless, furniture-grade energy column with zero exposed high-voltage wiring.
- Nominal Storage
- 5.0 kWh
- High-Voltage Bus
- 102.4 V
- Ultra-Slim Depth
- 170 mm
- External DC Conduits
- Zero
Type & Configuration
- Type
- Stackable battery module, HS3 system
- Cell type
- LiFePO4 (HS3 battery parameters)
Energy & Electrical
- Scalability
- Up to 8 battery modules per HS3 system
- Max. charging / discharging current, system (A)
- Up to 30 / 30 (model dependent)
Mechanical
- Battery dimension (H x W x D mm)
- 420 x 695 x 170
- Battery weight (kg)
- 53.0
Environment
- Ingress protection (system)
- IP65
- Ingress protection
- IP65
Verified module data
- Cell chemistry
- LiFePO4
- Battery module nominal energy
- 5 kWh
- Battery module nominal voltage
- 450 V
- Maximum charge current
- 7.9 A
- Maximum discharge current
- 7.9 A
- Operating temperature
- -30 to +50 °C
- Dimensions
- 370 × 695 × 170 mm
- Weight
- 52 kg
- Communication
- CAN
Project fit
Where this model fits.
Scenarios that show which projects the SAJ BU3-5.0-TV2-PRO belongs in, what to verify before quoting, and when another model is the better pick.
Project scenario
Modular Storage Stacking for SAJ HS3 and AS3 Systems
Installing or expanding an SAJ HS3 hybrid or AS3 AC-coupled modular tower.
Stacking 1 to 5 modules allows scaling storage from 5.0 kWh up to 25.0 kWh while maintaining the exact same 17 cm slim footprint.
What Linker confirms with you
- Confirm this model against the adjacent rating in the same family
Documents
SAJ HS3 Three Phase datasheet (UK, EN) SAJ BU3-5.0-TV Pro Battery Module (HS3) Datasheet EN SAJ HS3 (3K-12K) T2 Three-Phase ESS User Manual (EN, EU)Product questions
Can this BU3 battery module be used with standalone SAJ HS2 inverters?
No. Exclusively designed for HS3 and AS3 All-in-One systems. The BU3-5.0-TV2-PRO is engineered specifically for the SAJ HS3 and AS3 All-in-One modular column, using proprietary internal slide-and-lock busbars. For standalone wall-mounted SAJ HS2 or H2 inverters, use SAJ BU2-5.0-HV1 or BU2-5.0-HV5 modules.
What are the physical dimensions and weight of each BU3 module?
53.0 kg per module; 420 × 695 × 170 mm. Each brick weighs 53.0 kg (approx. 117 lbs) and measures 420 mm high, 695 mm wide, and 170 mm deep (ultra-slim profile).
Approved pairings
SAJ AS3-6K-S-W/G-PX (6 kW single-phase All-in-One)Item number DLK-SAJ-AS3-6KBU3-5.0-TV2-PRO modules, 1 to 8 per inverter, but a single stack holds only 4 ground-mounted / 3 wall-mounted (AS3 manual p33) - 8 modules means two or three stacks. The AS3 has NO PV input: it is AC-coupled storage beside an existing solar inverter.
SAJ HS3-10K-T2-W/G-PXItem number DLK-SAJ-HS310KT2WPBU3-5.0-TV2-PRO modules, 1 to 8 per inverter (450 V nominal, 380-500 V window matching the HS3 battery port exactly).
SAJ HS3-12K-T2-W/G-PXItem number DLK-SAJ-HS312KT2WPBU3-5.0-TV2-PRO modules, 1 to 8 per inverter (450 V nominal, 380-500 V window matching the HS3 battery port exactly).
SAJ HS3-5K-T2-W/G-PXItem number DLK-SAJ-HS35KT2WPBU3-5.0-TV2-PRO modules, 1 to 8 per inverter (450 V nominal, 380-500 V window matching the HS3 battery port exactly).
SAJ HS3-6K-T2-W/G-PXItem number DLK-SAJ-HS36KT2WPBU3-5.0-TV2-PRO modules, 1 to 8 per inverter (450 V nominal, 380-500 V window matching the HS3 battery port exactly).
SAJ HS3-8K-T2-W/G-PXItem number DLK-SAJ-HS38KT2WPBU3-5.0-TV2-PRO modules, 1 to 8 per inverter (450 V nominal, 380-500 V window matching the HS3 battery port exactly).