SAJ EK90 HS5-10K-S4-X (10 kW single-phase all-in-one)
Description
Whole-home three-phase emergency power in a single column.
SAJ EK90 HS5-10KT3-X is a 10 kW three-phase All-in-One modular hybrid inverter unit delivering 11,000 VA maximum apparent power and 20 kWp solar intake, engineered to stack cable-free atop 314 Ah BU5 battery bricks.
10,000 VA Continuous Three-Phase Backup
Powers whole-home three-phase domestic circuits, heat pumps, and induction hobs seamlessly during grid outages.
20,000 W Solar PV Input (200% Oversizing)
Double solar intake ensures rapid battery charging and full domestic self-consumption even on overcast winter days.
Direct Cable-Free BU5 Stacking
Mates power and communication lines directly through internal busbars with zero exposed high-voltage DC conduit.
100% Phase Unbalanced Output
Dynamically diverts power to heavily loaded single-phase household circuits without drawing expensive grid electricity.
More product details
Delivering full 10,000 VA continuous power across all three lines on backup, the HS5-10KT3 powers induction hobs, multi-split air conditioning, and domestic lighting simultaneously during utility outages.
- Delivers up to 15.9 A continuous output current per phase on backup to sustain heavy domestic loads.
- Sub-10 ms automatic transfer ensures zero computer reboots or smart home controller resets.
- 100% phase-unbalanced output eliminates grid draw on asymmetric domestic loads.
SAJ HS5
Compare different models
Scroll sideways to compare every model.
4 models
Rated AC power
10 kW
8 kW
12 kW
15 kW
Phase
Three-phase
Three-phase
Three-phase
Three-phase
MPPT trackers
3
3
3
3
Max. efficiency
98.2 %
98.2 %
98.2 %
98.2 %
Ingress protection
IP66
IP66
IP66
IP66
Furniture-grade single-column integration with internal busbars.
Stacking directly on top of BU5-6.0 / 7.0 / 9.0 kWh battery modules 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. IP65 cast-aluminum casing certified for clean indoor utility rooms or sheltered outdoor walls (-10 to +50 °C).
Technical data
The flagship 10 kW All-in-One residential energy hub engineered for complete household autonomy.
20 kWp solar intake delivering 10 kW continuous three-phase whole-home backup.
Serving as the benchmark 10 kW high-power tier for the EK90 three-phase series, the HS5-10KT3-X handles 20,000 Wp of solar input and delivers 10,000 W continuous (11,000 VA max) apparent power. Stacking directly on 314 Ah BU5 battery modules (6.0 to 27.0 kWh), it powers whole-home domestic circuits during grid drops with 100% phase-unbalanced compensation.
- Continuous 3-Phase Power
- 10,000 VA
- 200% Solar DC Intake
- 20,000 Wp
- Prismatic LFP Synergy
- 314 Ah
- External DC Conduits
- Zero
Inverter
- Rated AC power
- 10 kW
- Phase
- Three-phase (3L+N+PE)
- Max. PV input
- 20 kW
- MPPT trackers
- 3
- Max. efficiency
- 98.2%
- Whole-home backup
- built-in 63 A bypass, ≤10 ms switchover
Battery
- Cell
- 314 Ah LFP
- Module (EK90 BU5)
- 6 / 7 / 9 kWh packs
- Stackable capacity
- up to 6 packs → 6–54 kWh
- Cycle life
- 10,000 (SAJ datasheet banner states up to 12,000)
- Warranty
- 15 years (capacity retention per SAJ warranty policy)
EV charging
- Built-in DC EV charging
- Announced by SAJcurrently under development and coming soon
- V2H / V2G
- Announced by SAJcurrently under development and coming soon
Communication
- Interfaces
- WiFi / LAN / RS485
- App / EMS
- elekeeper 5.0 · eManager 5.0 (AI Saving 3.0)
- Metering
- Wireless-pro LoRa meter or DTSU666 + CTs
Model / Family
- Brand
- SAJ
- Model
- EK90 HS5-10KT3-X
- Series
- HS5 (EK90)
- Type
- Three-phase all-in-one
- Three-phase tiers
- 8 / 10 / 12 / 15 / 20 kW
Project fit
Where this model fits.
Scenarios that show which projects the SAJ EK90 HS5-10KT3-X (10 kW three-phase all-in-one, 2026 flagship) belongs in, what to verify before quoting, and when another model is the better pick.
Project scenario
Large All-Electric Single-Family Residences (14–20 kWp PV)
Modern detached homes equipped with a 3-phase air-to-water heat pump, induction cooktops, and high baseline domestic loads seeking a single-column All-in-One system.
10 kW continuous AC throughput provides the power needed to run heavy domestic loads simultaneously, while 20 kWp solar intake ensures fast battery replenishment on cloudy days.
- BoundaryIf the facility requires higher continuous power output (12–20 kW) to run workshops or high-inrush agricultural loads, step up to the higher power models. ---
What Linker confirms with you
- If the facility requires higher continuous power output (12–20 kW) to run workshops or high-inrush agricultural loads, step up to the higher power models. ---
Documents
SAJ EK90 HS5 Three-Phase Datasheet (EU)Product questions
What size AC circuit breaker is required for the HS5-10KT3-X?
3-pole 20 A or 25 A MCB; 5 × 4 mm² copper cable. The HS5-10KT3-X delivers a nominal continuous output current of 14.5 A per phase (max output current 15.9 A @ 400 V). A 3-pole 20 A or 25 A miniature circuit breaker (MCB) is standard on the AC distribution board.
System components
Required components
SAJ eSolar Wireless-pro Meter
Item number: DLK-SAJ-ESOLAR-WIRELESS-PRO-METER
The inverter needs a grid-side meter to see household import/export in real time. This is what enables self-consumption
Chint DTSU666 three-phase meter (80 A)
Item number: DLK-CHINT-DTSU666
SAJ's smart-meter sheet lists DTSU666 as the three-phase 80 A RS485 meter when the Wireless-pro meter cannot be used
Lazzen NDQ2S-63/3P
Item number: DLK-LAZZEN-NDQ2S-63
On the three-phase EK90 HS5, whole-home backup is built around a transfer switch that lets the entire house load switch
SAJ ATS1-T63-A automatic transfer switch
Item number: DLK-SAJ-ATS1T63A
For installations that want hands-off whole-home backup, the SAJ ATS panel automatically switches the whole-home load (u
Recommended components
SAJ eSolar AIO3 Pro
Item number: DLK-SAJ-ESOLAR-AIO3
This is the gateway that pushes system data to the cloud and app for remote monitoring, alarms/AI Care health checks.
SAJ EK90 BU5-6.0-TV / BU5-7.0-TV / BU5-9.0-TV
Item number: DLK-SAJ-EK90-BU5-6-0-TV
Storage capacity is scaled purely by adding modules, up to 6 battery modules per system (system energy configurable rou
Optional components
SAJ Integrated EVDC charging module
Item number: DLK-SAJ-INTEGRATED-EVDC-CHARGING-MODULE
Roadmap option only: SAJ marks bidirectional V2H/V2G as currently under development. Confirm availability and rating before adding it to the BOM
SAJ eManager
Item number: DLK-SAJ-EMANAGER
For households that want deeper smart-energy control, coordinating extra loads, external meters and tariff-based optimi
SAJ Smart Wi-Fi Plug
Item number: DLK-SAJ-SAJ-SMART-PLUG
Enables load shifting: the AI energy manager can turn a specific appliance on when surplus solar or cheap-tariff energy is available.
Approved pairings
SAJ EK90 BU5-6.0-TV battery pack (6 kWh, 314 Ah LFP)Item number DLK-SAJ-EK90-BU5-6-0-TVBlind-mate stacking only: 1 to 6 BU5 packs (6/7/9 kWh, 100% DoD) under the HS5 unit. SAJ defers pack-combination rules to a battery combination datasheet that its Download Center does not carry, so the 21 permitted size combinations are undocumented - quote conservatively.
SAJ EK90 BU5-7.0-TV battery pack (7 kWh, 314 Ah LFP)Item number DLK-SAJ-EK90-BU5-7-0-TVBlind-mate stacking only: 1 to 6 BU5 packs (6/7/9 kWh, 100% DoD) under the HS5 unit. SAJ defers pack-combination rules to a battery combination datasheet that its Download Center does not carry, so the 21 permitted size combinations are undocumented - quote conservatively.
SAJ EK90 BU5-9.0-TV battery pack (9 kWh, 314 Ah LFP)Item number DLK-SAJ-EK90-BU5-9-0-TVBlind-mate stacking only: 1 to 6 BU5 packs (6/7/9 kWh, 100% DoD) under the HS5 unit. SAJ defers pack-combination rules to a battery combination datasheet that its Download Center does not carry, so the 21 permitted size combinations are undocumented - quote conservatively.
