SAJ EK90 BU5-9.0-TV battery pack (9 kWh, 314 Ah LFP)

Name: SAJ EK90 BU5-9.0-TV battery pack (9 kWh, 314 Ah LFP)
Brand: SAJ
SKU: DLK-SAJ-EK90-BU5-9-0-TV
Availability: BackOrder

Description

Automotive-grade cell technology with fewer internal joints.

SAJ EK90 BU5-9.0-TV is the flagship 9.0 kWh high-voltage LFP storage brick powered by commercial-grade 314 Ah prismatic cells, engineered to stack cable-free beneath SAJ EK90 HS5 All-in-One residential energy towers up to 27.0 kWh in 3 modules.

SAJ EK90 BU5-9.0-TV battery pack (9 kWh, 314 Ah LFP)

314 Ah Commercial-Grade Prismatic LFP Cells
Large-format cell architecture packs high capacity into fewer cell interconnects for superior thermal stability.
9.0 kWh Maximum Module Density
Delivers the highest energy capacity per module in the EK90 range, reaching 27.0 kWh in just 3 vertical bricks.
Cable-Free Direct Column Stacking
Mates high-voltage power and communication lines directly through internal busbars with zero exposed DC conduits.
IP65 All-Weather Die-Cast Enclosure
Weatherproof casing certified for clean indoor utility rooms or sheltered outdoor installations (-10 to +50 °C).

More product details

Small cylindrical and pouch cells require hundreds of welded interconnects that introduce resistance and failure points. The BU5-9.0-TV uses commercial-grade 314 Ah prismatic LFP cells to maximize reliability.

High-capacity 314 Ah cell architecture minimizes internal series connections and localized heat buildup.
Deep 90% depth-of-discharge provides 8.10 kWh of usable energy per module across thousands of daily cycles.
Integrated sub-BMS electronics balance cell voltages and monitor thermal parameters in real time.

Technical data

The apex high-density storage module engineered for heavy domestic electrification and heat pumps.

9.0 kWh maximum capacity LFP storage module powered by 314 Ah prismatic cells.

Delivering the highest storage density in the EK90 modular series, the BU5-9.0-TV packs 9.0 kWh into a single 314 Ah prismatic cell brick. Stacking three of these modules beneath an EK90 HS5 inverter achieves 27.0 kWh (24.3 kWh usable) of high-voltage storage in a compact column, powering all-electric homes and heat pumps through extended winter nights.

Maximum Module Storage: 9.0 kWh
Prismatic LFP Cells: 314 Ah
3-Brick Stacking: Up to 27 kWh
External DC Conduits: Zero

Battery pack

Chemistry / cell: LiFePO4; 314 Ah cell
Total / usable energy: 9 kWh / 9 kWh (100% depth of discharge)
Rated voltage: 390 V (charge at constant current to a maximum of 390 V per SAJ's recommended method)
Max. charge/discharge power: 4.6 kW
Max. charge/discharge current: 11.8 A
Cycle life: 10,000 cycles (user manual, battery-manufacturer figure, 25±2°C)SAJ datasheet highlight: 12,000 cycles (0.2C, to 60% SOH, lab conditions)
Dimensions / weight: 835 × 270 × 270 mm (W×H×D)79.2 kg (battery base BE5-TV: 8 kg)
Cooling / operating range: Natural convectioncharging/discharging -30 °C to +50 °C · 5–95% RH non-condensing
Warranty: Per SAJ warranty policy (no retention figure published for this model)

System integration

Compatible systems: SAJ EK90 HS5 single-phase (5–10 kW, battery window 300–600 V) and three-phase (8–20 kW, battery window 600–900 V) all-in-one systems
Max. packs per system: 6 (system energy configurable 6–54 kWh in SAJ's published X-value ladder)
Connection: Blind-mate connectors, no inter-module cablingbuilt-in per-pack DC-DC optimizer · CAN communication to the inverter
Mounting accessories: Battery base BE5-TV (floor stack) or wall-mounting bracket BT5-TV, per SAJ's model list

Project fit

Where this model fits.

Scenarios that show which projects the SAJ EK90 BU5-9.0-TV battery pack (9 kWh, 314 Ah LFP) belongs in, what to verify before quoting, and when another model is the better pick.

01

Project scenario

Large Electrified Homes with Heat Pumps Stacking 18–27 kWh Storage

Detached homes running multi-split heat pumps and EV charging seeking deep storage without multi-tower floor sprawl.

Stacking 2 modules gives 18.0 kWh; stacking 3 modules gives 27.0 kWh (24.3 kWh usable), providing complete winter heating autonomy in a single column.

BoundaryIf household overnight demand is moderate (< 10 kWh) and the property requires a lower starting investment, step down to the 6.0 kWh or 7.0 kWh bricks. ---

What Linker confirms with you

If household overnight demand is moderate (< 10 kWh) and the property requires a lower starting investment, step down to the 6.0 kWh or 7.0 kWh bricks. ---

Documents

SAJ EK90 HS5 Three-Phase Datasheet (EU) Datasheet · PDF · EN

Product questions

What is the weight of the BU5-9.0-TV module?

Approx. 79.2 kg per module. Built with heavy-duty 314 Ah prismatic cells and reinforced aluminum framing, each 9.0 kWh brick weighs approx. 79.2 kg (174 lbs). It features integrated side lifting handles for a two-person team lift.

Can this 9.0 kWh module be stacked with BU3 modules on an HS3 inverter?

No. BU5 is physically and electrically dedicated to EK90 HS5 systems. The BU5 series uses a unique wide-body form factor and high-voltage busbar interface designed exclusively for SAJ EK90 HS5 inverters. For HS3/AS3 towers, use BU3-5.0-TV2-PRO modules.