SAJ EK90 HS5-6K-S3-X (6 kW single-phase all-in-one)
Description
3-pitch solar tracking on a single-phase residential inverter.
SAJ EK90 HS5-5K-S3-X is a 5 kW single-phase All-in-One modular hybrid inverter unit with 3 independent 16 A MPPT channels and 200% DC oversizing (10 kWp), engineered to stack cable-free atop 314 Ah BU5 battery bricks.
3 Independent 16 A MPPT Trackers
Industry-first 3-MPPT single-phase residential inverter, eliminating string mismatch across complex multi-pitch roofs.
10,000 Wp Solar PV Intake (200% Ratio)
Double solar intake ensures rapid battery charging and daytime 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.
Sub-10 ms Seamless UPS Backup
Built-in automated transfer switch keeps critical home electronics and heating controls online during outages.
More product details
Most single-phase residential inverters feature only 2 MPPTs, forcing installers to compromise string design or install expensive DC optimizers on 3-pitch roofs. The HS5-5K provides 3 independent 16 A MPPT channels (Isc 20 A).
- 3 MPPT channels allow dedicated tracking for East, South, and West domestic roof planes with zero cross-string clipping.
- Wide MPPT operating window (100–550 V) optimizes harvest across extreme temperature swings.
- 200% DC oversizing channels surplus daytime generation directly into high-voltage BU5 storage.
SAJ HS5
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4 models
Rated AC power
5 kW
6 kW
8 kW
10 kW
Phase
Single-phase
Single-phase
Single-phase
Single-phase
MPPT trackers
3
3
3
4
Max. efficiency
98.0 %
98.0 %
98.0 %
98.0 %
Battery voltage
350-600 V
350-600 V
350-600 V
350-600 V
Ingress protection
IP66
IP66
IP66
IP66
Weight
Inverter: 39.5; Battery pack:BU5-6.0-TV: 60.4; BU5-7.0-TV: 68; BU5-9.0-TV: 79.2; Battery base: 8 kg
Inverter: 39.5; Battery pack:BU5-6.0-TV: 60.4; BU5-7.0-TV: 68; BU5-9.0-TV: 79.2; Battery base: 8 kg
Inverter: 39.5; Battery pack:BU5-6.0-TV: 60.4; BU5-7.0-TV: 68; BU5-9.0-TV: 79.2; Battery base: 8 kg
Inverter: 39.5; Battery pack:BU5-6.0-TV: 60.4; BU5-7.0-TV: 68; BU5-9.0-TV: 79.2; Battery base: 8 kg
Dimensions
Inverter: 835 / 350 / 270; Battery pack: 835 / 270 / 270; Battery base: 835 / 70 - 80 / 270 mm
Inverter: 835 / 350 / 270; Battery pack: 835 / 270 / 270; Battery base: 835 / 70 - 80 / 270 mm
Inverter: 835 / 350 / 270; Battery pack: 835 / 270 / 270; Battery base: 835 / 70 - 80 / 270 mm
Inverter: 835 / 350 / 270; Battery pack: 835 / 270 / 270; Battery base: 835 / 70 - 80 / 270 mm
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).
3 MPPTs at 600 V
3 trackers take the string plan on this S3 head. Maximum PV voltage stays at 600 V on single-phase HS5
BU5 stack under the head
1 to 6 blind-mate packs, 6 to 54 kWh family range. No cable battery interface to another brand
Technical data
Furniture-grade residential energy management engineered for complex multi-pitch single-phase homes.
3 independent MPPT trackers with 10 kWp solar intake in a 5 kW single-phase tower.
Bringing commercial-grade 3-MPPT tracking to single-phase residences, the EK90 HS5-5K-S3-X accepts up to 10,000 Wp of rooftop solar across 3 distinct roof aspects. It stacks directly on 314 Ah BU5 modular battery bricks (6.0 to 27.0 kWh), delivering clean 5,000 VA single-phase power with sub-10 ms UPS backup.
- Single-Phase Power
- 5,000 VA
- 200% Solar DC Intake
- 10,000 Wp
- Multi-Pitch Routing
- 3 MPPTs
- External DC Conduits
- Zero
Inverter: AC Output (On-Grid)
- Rated output power
- 5 kW
- Rated / max. apparent power
- 5 / 5 kVA
- Rated / max. output current
- 21.7 A / 21.7 A
- Phase / rated output voltage
- Single-phase, L+N+PE; 220, 230, 240 V
- Rated AC grid frequency
- 50/60 Hz
- Max. AC input current
- 63 A, the built-in 63 A bypass enables whole-house backupcurrent configurable in the elekeeper App
- Adjustable power factor
- 0.8 leading – 0.8 lagging
- Total current harmonic distortion
- THDi < 3%
Inverter: PV Input & Efficiency
- Recommended max. PV power
- 10 kWp
- Max. input voltage
- 600 V
- MPPT voltage range
- 50–550 V (operating range 50–600 V)
- Start-up / nominal DC input voltage
- 80 V / 360 V
- Max. input current per MPPT
- 20 A (25 A max. short-circuit)
- Number of MPP trackers / strings
- 3 MPPT, strings 1+1+1 (5K–8K: 3 MPPTthe 10 kW unit is the -S4- version with 4 MPPT)
- Max. efficiency
- 98.0%
- Euro (EU) efficiency
- 97.6%
Battery (EK90 BU5 HV packs)
- Battery / cell chemistry
- LiFePO4 (LFP), 314 Ah cell
- Module (pack) models & energy
- EK90 BU5-6.0-TV = 6 kWhBU5-7.0-TV = 7 kWh · BU5-9.0-TV = 9 kWh (usable = total, 100% depth of discharge)
- Stackable capacity per system
- Up to 6 battery packsconfigurable system energy X = 6/7/9/12/14/15/16/18/21/24/25/27/28/30/35/36/40/42/45/50/54 kWh
- Rated pack voltage / system battery voltage range
- 390 V per BU5 pack (each with built-in DC-DC optimizer)system battery voltage range 300–600 V
- Max. charge/discharge power per pack
- BU5-6.0-TV = 3 kW; BU5-7.0-TV = 3.5 kW; BU5-9.0-TV = 4.6 kW
- Max. charge/discharge current per pack
- BU5-6.0-TV = 7.7 A; BU5-7.0-TV = 9.0 A; BU5-9.0-TV = 11.8 A
- Cycle life
- 10,000 cycles (user manual, provided by the battery manufacturer, 25±2°C)the datasheet marketing highlight states 12,000 cycles (0.2C, to 60% SOH, lab conditions)
- Battery communication interface
- CAN
- Warranty
- Per SAJ warranty policy (datasheet and manual state 'refer to the warranty policy'no retention figure published for this model)
Backup / Off-Grid Output
- Max. backup output apparent power
- 5 kVA
- Max. backup output current
- 21.7 A
- Peak backup output apparent power
- 10 kVA for 10 s
- Switchover time (grid-to-backup)
- ≤ 10 ms
- Whole-house backup path
- Built-in 63 A bypass (no backup retrofit box required)alternatively SAJ's manual specifies a Lazzen NDQ2S-63/1P manual transfer switch for the whole-home backup topology, plus a partial-backup wiring option
General / Enclosure & Communication
- Ingress protection (IP)
- IP66
- Operating temperature range
- -30 °C to +50 °C (charging/discharging)relative humidity 5–95% non-condensing
- Cooling
- Smart air cooling (inverter) with heating function for low-temperature operationbattery packs natural convection
- Dimensions (W × H × D)
- Inverter: 835 × 350 × 270 mmbattery pack: 835 × 270 × 270 mm · battery base: 835 × 70–80 × 270 mm
- Weight
- Inverter: 39.5 kgbattery packs: BU5-6.0-TV 60.4 kg, BU5-7.0-TV 68 kg, BU5-9.0-TV 79.2 kg · battery base: 8 kg
- Corrosion resistance / altitude / class
- C4max. 3000 m · protective class I · overvoltage category DC II / AC III · non-isolated (transformerless) topology
- Communication
- WLAN / Fast Ethernet / RS485communication module eSolar AIO3 Pro or eSolar 4G Pro
- Metering
- Dual-channel Wireless-pro LoRa meter (wiring-free, optimal range 150 m penetrating walls)wired RS485 meter connections also supported
Project fit
Where this model fits.
Scenarios that show which projects the SAJ EK90 HS5-5K-S3-X (5 kW single-phase all-in-one) belongs in, what to verify before quoting, and when another model is the better pick.
Project scenario
Single-Phase Residences with 3 Roof Pitches (6–10 kWp PV)
Single-phase homes with dormers, extensions, or East-South-West roof aspects requiring 3 dedicated MPPT trackers.
3 MPPT channels eliminate external optimizers, while 5 kW AC output satisfies standard single-phase grid connection rules.
- BoundaryIf local grid connection rules permit higher single-phase export (up to 32 A / 40 A) and the home runs an EV charger and heat pump, step up to the HS5-6K, HS5-8K, or HS5-10K. ---
What Linker confirms with you
- If local grid connection rules permit higher single-phase export (up to 32 A / 40 A) and the home runs an EV charger and heat pump, step up to the HS5-6K, HS5-8K, or HS5-10K. ---
Documents
SAJ EK90 HS5 Single-Phase Datasheet (EU)Product questions
What size AC circuit breaker is required for the HS5-5K-S3-X?
25 A or 32 A 1-pole MCB; 3 × 4 mm² to 3 × 6 mm² copper cable. The HS5-5K-S3-X delivers a nominal continuous output current of 21.7 A (max output current 22.7 A @ 230 V). A 1-pole 25 A or 32 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 grid-point metering to see import/export in real time, this enables self-consumption optimisation and export limiting. The EK90 system is built around SAJ's dual-channel wireless LoRa meter: wiring-free, optimal range 150 m through walls
Recommended components
SAJ eSolar AIO3 data collector
Item number: DLK-SAJ-ESOLAR-AIO3
Cloud/app gateway for remote monitoring, AI Care health checks, firmware updates and remote commissioning: SAJ's documents list the eSolar AIO3 Pro / 4G Pro as the system's communication modules
SAJ EK90 BU5-6.0 / 7.0 / 9.0-TV battery packs
Item number: DLK-SAJ-EK90-BU5-6-0-TV
Storage scales purely by stacking packs, up to 6 per system (6–54 kWh), each with its own DC-DC optimizer, so capacity can be added later without dragging down the existing stack
Optional components
SAJ ATS 63 A transfer panel (ATS1-T63-A)
Item number: DLK-SAJ-ATS1T63A
Automatic grid/backup changeover (63 A, automatic/manual modes) for hands-off whole-home backup instead of the manual transfer-switch topology in SAJ's manual, confirm the phase variant for a single-phase site when quoting
SAJ eManager
Item number: DLK-SAJ-EMANAGER
Extends the elekeeper ecosystem with heat-pump linkage, generation metering and deeper tariff-based load scheduling beyond the standard meter, optional, not required for a basic PV+storage install
SAJ Smart Wi-Fi Plug
Item number: DLK-SAJ-SAJ-SMART-PLUG
Lets the AI energy manager shift individual appliance loads into surplus-solar or cheap-tariff windows, a low-cost way to raise self-consumption
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.
