SAJ

B2-5.0-HV1

Item number: DLK-SAJ-B250HV1

Usable energy: 4.8 kWh
Nominal energy: 5.0 kWh
Nominal voltage: 102.4 V
Max. charge current: 30 A

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Orderable · lead time confirmed after order

Germany delivery estimate: €85.00 to €205.00 · The final delivery charge is included in your Proforma.

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Plan with B2-5.0-HV1

New system, extension or replacement? Linker Advisor starts from this model and asks only for what is still open (existing model, quantity, postcode, installation date).

Description

Entry-level high-voltage pairing without multi-cabinet sprawl.

SAJ B2-5.0-HV1 is a compact 5.0 kWh high-voltage LFP storage starting tower combining a BC2 master controller base with one 5.0 kWh module, engineered for baseline residential self-consumption with plug-and-play vertical expansion up to 25 kWh.

Pre-Paired Complete High-Voltage Starting Kit
Bundles master BMS controller, floor pedestal, and 5.0 kWh LFP brick for instant commissioning.
30 A Continuous Power Throughput
Rapidly absorbs solar surplus at up to 3 kW, discharging on-demand to power evening domestic baselines.
Cable-Free Vertical Stacking
Internal busbar terminals eliminate exposed high-voltage DC wiring and simplify maintenance.
Headroom to Expand up to 25 kWh
Add up to 4 additional BU2 modules on top of this exact stack as household power demands grow.

More product details

Low-voltage 48 V batteries suffer high resistive line losses during high-draw discharges. The B2-5.0-HV1 operates across an 89.6–115.2 V window, providing high round-trip storage efficiency while keeping current draw at 30 A.

Direct DC coupling eliminates inverter step-up losses, maximizing solar self-consumption.
Internal busbar mating passes high-voltage power and communication directly through module guide pins.
Cell-level temperature and voltage diagnostics monitored in real time by the integrated master BMS.

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4 models

SAJ B2-5.0-HV1

This model

SAJ B2-10.0-HV1

SAJ B2-15.0-HV1

SAJ B2-20.0-HV1

Usable energy

4.8 kWh

9.6 kWh

14.4 kWh

19.2 kWh

Nominal energy

5.0 kWh

10.0 kWh

15.0 kWh

20.0 kWh

Nominal voltage

102.4 V

204.8 V

307.2 V

409.6 V

Max. charge current

30 A

Max. discharge current

30 A

Ingress protection

IP65

Weight

50.5 kg

101 kg

151.5 kg

202 kg

View full technical data

Low-profile floor column with multi-year expansion headroom.

Designed for space-constrained residential installations, this 1-module tower stands on its moisture-isolated base pedestal, leaving vertical headroom to add up to 4 additional modules later. Heavy-duty floor pedestal isolates power modules from ground moisture and standing cellar condensation. Expandable up to 5 modules (25.0 kWh) by simply stacking additional BU2-5.0-HV1 bricks on top. IP65 weatherproof enclosure certified for unheated basements, technical utility rooms, and sheltered outdoor alcoves.

30 A either way.

Max charge and discharge stay at 30 A from the first brick through a five-module column.

IP65 stack module.

Outdoor-rated brick, charge 0-50 C, discharge -10-50 C, CAN to the hybrid.

Technical data

The ideal entry-level storage tower for standard single-family homes with 5–7 kWp solar.

Compact 5.0 kWh high-voltage starting tower with plug-and-play expansion.

Combining a BC2-HV1 master controller with one 5.0 kWh BU2 module, this entry-level high-voltage battery tower provides reliable 102.4 V storage in a minimal floor footprint. Designed for standard single-family homes, it supports up to 30 A continuous charge/discharge and expands effortlessly up to 25 kWh without replacing the master base.

Nominal Storage: 5.0 kWh
High-Voltage Bus: 102.4 V
Continuous Current: 30 A
All-Weather Build: IP65

Type & Configuration

Battery module: BU2-5.0-HV1

Energy & Electrical

Operating voltage [V]: 89.6 - 115.2 V
Max. charge current: 30 A
Max. discharge current: 30 A

Environment

Mounting: Wall or ground
Ingress protection: IP65

Verified module data

Battery module nominal energy: 5.0 kWh
Battery module nominal voltage: 102.4 V
Maximum charge current: 30 A
Maximum discharge current: 30 A
Operating temperature: Charge 0 to +50 °C; discharge -10 to +50 °C
Dimensions: 261 × 626 × 365 mm
Weight: 50.5 kg
Communication: CAN

Project fit

Where this model fits.

Scenarios that show which projects the SAJ B2-5.0-HV1 belongs in, what to verify before quoting, and when another model is the better pick.

Project scenario

Small Single-Family Homes with 5–7 kWp Solar & Modest Night Demand

Homes with 2–3 occupants consuming 250–350 W baseline power overnight (lighting, Wi-Fi, refrigeration, TV).

4.5 kWh usable capacity buffers typical evening consumption with reserve remaining for morning routines, avoiding paying for unneeded battery capacity.

BoundaryIf the household operates an air-to-water heat pump or an electric vehicle, a 5.0 kWh tower will deplete early in the evening. Step up to the 10.0 kWh (2-module) or 15.0 kWh (3-module) tower. ---

What Linker confirms with you

If the household operates an air-to-water heat pump or an electric vehicle, a 5.0 kWh tower will deplete early in the evening. Step up to the 10.0 kWh (2-module) or 15.0 kWh (3-module) tower. ---

Documents

SAJ B2 HV1 / HV5 Series high-voltage battery datasheet (AU, EN) Datasheet · PDF · EN SAJ B2 Series (5.0-25.0) HV1/HV5 Battery Datasheet (EN, AU) Datasheet · PDF · EN

Product questions

Can I add a second or third module to this exact tower 2 years later?

Yes. Up to 5 modules total (25.0 kWh) on the same BC2 base. The BC2-HV1 base and master BMS included with this kit support up to 5 modules total. To expand, simply place a new BU2-5.0-HV1 module on top of the column, re-anchor the wall brackets, and power on. The system will auto-calibrate to the new capacity.