SAJ

B2-20.0-HV1

Item number: DLK-SAJ-B2200HV1

Usable energy: 19.2 kWh
Nominal energy: 20.0 kWh
Nominal voltage: 409.6 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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Description

Low-current high-voltage transmission for heavy winter discharge.

SAJ B2-20.0-HV1 is a 20.0 kWh high-voltage LFP battery tower delivering 409.6 V nominal operating voltage across four stacked 5 kWh modules, engineered for large residential estates, multi-family properties, and continuous multi-zone heat pump heating.

409.6 V High-Voltage Bus for Low Line Loss
Higher operating voltage reduces internal current stress, keeping operating temperatures low during heavy continuous discharges.
18.00 kWh Usable Storage Reserve
Provides reliable multi-day energy storage to bridge overcast winter periods and heavy residential heating cycles.
30 A High-Voltage Power Delivery (12 kW Max)
Directly powers large residential three-phase sub-panels and heat pump buffers.
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 6–10 kW of continuous power from low-voltage batteries generates extreme current stress and cable heating. Operating at 409.6 V nominal, the B2-20.0-HV1 delivers high power with minimal thermal losses.

128S series LFP cell string keeps operating temperatures low during sustained 6–12 kW discharge cycles.
Direct DC coupling eliminates inverter step-up losses, maximizing seasonal energy efficiency.
Cell-level active balancing maintains uniform state-of-charge across all 4 stacked modules.

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4 models

SAJ B2-20.0-HV1

This model

SAJ B2-10.0-HV1

SAJ B2-15.0-HV1

SAJ B2-25.0-HV1

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

Max. discharge current

30 A

Ingress protection

IP65

Weight

202 kg

101 kg

151.5 kg

252.5 kg

View full technical data

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 on 30 A.

Rated power scales with the stack while charge and discharge current stay at 30 A.

Outdoor IP65 column.

Charge 0-50 C, discharge -10-50 C, CAN to the hybrid.

Technical data

Heavy-duty residential storage engineered for high-consumption electrified properties.

409.6 V high-voltage storage sized for large estates and continuous heat pump operation.

Four stacked modules provide 20.0 kWh of high-voltage storage at 409.6 V nominal across a 358.4–460.8 V window. This tower is engineered for large residential properties and multi-family homes, supplying continuous high-voltage power to sustain multi-zone heat pumps, domestic EV charging, and heavy domestic appliances through cold winter nights.

Nominal Storage: 20.0 kWh
High Operating Voltage: 409.6 V
Continuous Current: 30 A
All-Weather Build: IP65

Type & Configuration

Type: High-voltage residential battery system, B2 Series (HV1)
Battery module: BU2-5.0-HV1 (32S1P, 102.4 V / 50 Ah)
Control module: BC2-HV1
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): 202
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-HV1 belongs in, what to verify before quoting, and when another model is the better pick.

Project scenario

Large Luxury Residences & Multi-Family Properties (14–20 kWp Solar Arrays)

Properties running multiple heat pumps, electric vehicle charging, and heavy domestic appliances requiring deep overnight storage.

18.00 kWh usable capacity provides the depth needed to achieve 90%+ annual solar self-consumption, buffering high daytime yields to cover heavy evening heating.

BoundaryIf the home features a geothermal heat pump, a swimming pool heater, or two EVs charging overnight, step up to the 25.0 kWh (5-module) flagship tower. ---

What Linker confirms with you

If the home features a geothermal heat pump, a swimming pool heater, or two EVs charging overnight, step up to the 25.0 kWh (5-module) flagship 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

What is the total assembled height and weight of the 4-module tower?

1,305 mm height (approx. 51 inches); 213.0 kg total weight. * Total Height: 1,305 mm (approx. 1.3 m) on its leveling pedestal. * Total Weight: 213 kg (approx. 470 lbs). * Structural Requirement: Securing the top wall-anchoring bracket into solid masonry is mandatory for seismic stability.

Can I add a 5th module to this tower in the future to reach 25 kWh?

Yes. Stacks up to 5 modules total on the same BC2 base. The BC2-HV1 base supports up to 5 modules. To expand, simply place a fifth BU2-5.0-HV1 module on top of the column, re-anchor the wall brackets, and power on. The system will auto-calibrate to 25.0 kWh / 512 V.