SAJ

B2-15.0-HV1

Item number: DLK-SAJ-B2150HV1

Usable energy: 14.4 kWh
Nominal energy: 15.0 kWh
Nominal voltage: 307.2 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 B2-15.0-HV1

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Description

Maximizing round-trip storage efficiency at optimum DC voltage.

SAJ B2-15.0-HV1 is a 15.0 kWh high-voltage LFP battery tower delivering 307.2 V nominal operating voltage across three stacked 5 kWh modules, engineered to place hybrid inverters in their peak conversion efficiency sweet-spot and sustain domestic heat pumps overnight.

307.2 V Inverter Efficiency Sweet-Spot
Operates in the optimal DC-DC voltage range of three-phase hybrid inverters, maximizing round-trip storage yield.
13.50 kWh Usable Storage Reserve
Provides ample capacity to sustain variable-speed heat pump cycles and domestic baselines through cold winter nights.
30 A Continuous Power Throughput (9 kW Output)
Comfortably runs high-load three-phase residential machinery and emergency backup circuits.
Cable-Free Vertical Column Stacking
Consolidates 15.0 kWh into a single 1.04 m column without consuming extra floor space.

More product details

Operating high-voltage storage at ~300 V minimizes the voltage transformation ratio between the battery and the inverter, reducing heat generation inside the inverter's power stage.

96S series LFP cell string provides 307.2 V nominal, placing inverter DC-DC converters in their lowest-loss operating zone.
Delivers up to 9.0 kW continuous power throughput at 30 A to easily run domestic appliances during evening peaks.
Integrated sub-BMS electronics balance cell voltages actively across all three stacked modules.

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4 models

SAJ B2-15.0-HV1

This model

SAJ B2-10.0-HV1

SAJ B2-20.0-HV1

SAJ B2-25.0-HV1

Usable energy

14.4 kWh

9.6 kWh

19.2 kWh

24 kWh

Nominal energy

15.0 kWh

10.0 kWh

20.0 kWh

25.0 kWh

Nominal voltage

307.2 V

204.8 V

409.6 V

512 V

Max. charge current

30 A

Max. discharge current

30 A

Ingress protection

IP65

Weight

151.5 kg

101 kg

202 kg

252.5 kg

View full technical data

15 kWh capacity in an ultra-lean 0.23 m² floor footprint.

Stacking 3 modules vertically reaches a clean 1.04 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).

H2 and HS2 listed.

SAJ lists this B2 path against H2; HS2 takes up to five BU2 modules on 180-600 V.

Same 30 A through the climb.

Charge and discharge current stay at 30 A from 5 kWh to 25 kWh.

Technical data

The robust residential storage tier engineered for all-electric households with active heating buffers.

307.2 V high-efficiency operating sweet-spot for all-electric domestic autonomy.

Three stacked modules deliver 15.0 kWh of LFP storage across a 268.8–345.6 V working window. Operating right in the sweet spot of European three-phase hybrid inverters, this tower provides high DC-to-DC conversion efficiency and substantial energy reserves to power domestic heat pumps and overnight electric vehicle charging with zero grid purchases.

Nominal Storage: 15.0 kWh
Optimal Voltage Bus: 307.2 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: 3
Rated energy (kWh): 15.0
Usable energy (kWh): 14.4
Rated power (W): 9216
Nominal voltage (V): 307.2
Operating voltage (V): 268.8 - 345.6
Max. charge current (A): 30
Max. discharge current (A): 30

Mechanical

Module stack dimension (H x W x D mm): 783 x 626 x 365
Module stack weight (kg): 151.5
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 B2-15.0-HV1 belongs in, what to verify before quoting, and when another model is the better pick.

Project scenario

Electrified Residences with Heat Pumps (10–14 kWp Solar Arrays)

Single-family homes using modulating heat pumps for space heating and hot water, consuming 10–15 kWh overnight during winter months.

13.50 kWh usable capacity provides the depth needed to sustain continuous compressor cycling and domestic baselines from 5 PM to 8 AM without grid purchases.

BoundaryIf the home features a geothermal heat pump, a sauna, or an EV charging overnight, step up to the 20.0 kWh (4-module) or 25.0 kWh (5-module) tower. ---

What Linker confirms with you

If the home features a geothermal heat pump, a sauna, or an EV charging overnight, step up to the 20.0 kWh (4-module) or 25.0 kWh (5-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 this 15.0 kWh tower sustain a domestic heat pump through an entire winter night?

Yes, for standard 4–8 kW thermal heat pumps under typical winter conditions. A modern modulating air-to-water heat pump draws approx. 1.2 kW to 1.8 kW electrical power under standard winter cycling. With 13.50 kWh of usable energy, the tower comfortably powers 7 to 9 hours of active compressor runtime alongside household baseline loads, shielding the home from expensive peak nighttime grid electricity.

What is the total assembled height and weight of the 3-module tower?

1,044 mm height; 162.5 kg total weight. * Total Height: 1,044 mm (approx. 41 inches) on its leveling pedestal. * Total Weight: 162.5 kg (approx. 358 lbs). * Structural Recommendation: Secure the included top wall-mounting bracket into solid masonry or wall studs for seismic stability.