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SAJ EK90 HS5-15KT3-X (15 kW three-phase all-in-one)
SAJ Hybrid Inverter

SAJ EK90 HS5-15KT3-X (15 kW three-phase all-in-one)

SAJ's 2026 three-phase all-in-one: hybrid inverter, stackable 314 Ah LFP battery (up to 54 kWh), built-in DC EV charging and whole-home backup in one cabinet.

  • Whole-home three-phase backup, ≤10 ms switchover — built-in 63 A bypass, no separate backup box
  • Scales to 54 kWh usable on 314 Ah LFP cells; 10,000-cycle, 15-year product warranty
  • Bidirectional DC EV charging is announced but currently under development; do not include it in the commissionable scope yet
  • VDE-AR-N 4105 · German PV-wholesale stock · request a quote
Three Phase
Phase
98.2 %
Max. efficiency
IP66
Ingress protection
Manufacturer
SAJ
Model code
EK90 HS5-15KT3-X
Item no.
DLK-SAJ-EK90HS515KT3X
Delivery
Germany delivery estimate: EUR 39–90 · The final delivery charge is included in your Proforma.
Orderable · lead time confirmed after order

Plan with EK90 HS5-15KT3-X

New system, extension or replacement? Linker Advisor starts from this article and asks only for what is still open — existing model, quantity, postcode, installation date.

Trade price
Sign in for partner pricing Download datasheet
Required to install — not in the box
SAJ eSolar Wireless-pro Meter (dual-channel LoRa smart meter) The inverter needs a grid-side meter to see household import/export in real time. This is what enables self-consumption
View
Chint DTSU666 three-phase meter w/ 3x100A CTs Where the wireless LoRa meter cannot be used (long distance, metal enclosure, retrofit into an existing three-phase boar

Figures transcribed from the manufacturer datasheet on file. Confirm your grid code and configuration with our engineers before ordering.

  • GoodWe · SAJ · Pylontech · EcoFlow · Chint paired from the maker’s own lists
  • Datasheets on file for every item
  • Within 24 h engineering response
  • MOQ 1 unit · EU delivery
  • Engineering-checked configurations
Why buyers spec it

Numbers that survive the bank's site audit.

Every figure below comes from the manufacturer datasheet on file — the same document your lender's technical advisor will request.

15kW

Nominal AC power

3

MPPTs

98.2%

Max. efficiency

One cabinet, the whole system
System logic

One cabinet, the whole system

Hybrid inverter, stackable 314 Ah LFP battery, built-in DC EV charging, whole-home backup and AI energy management integrated into a single wall-standing unit — the hardware behind the specs above.

Whole-home three-phase backup, ≤10 ms switchover — built-in 63 A bypass, no separate backup box
Scales to 54 kWh usable on 314 Ah LFP cells; 10,000-cycle, 15-year product warranty
Bidirectional DC EV charging is announced but currently under development; do not include it in the commissionable scope yet
AI Saving 3.0 — Higher returns for every kWh
Headline feature

AI Saving 3.0 — Higher returns for every kWh

SAJ frames this as the money-maker: its AI energy management system automatically optimizes power generation, storage and consumption by combining weather data and electricity rates, 'putting real money back in your pocket every month' while ensuring stable whole-home supply.

SAJ promotes concrete figures on this feature — 90% solar-prediction accuracy, 90% consumption-forecast accuracy, 100+ dynamic-tariff integrations, and 'VPP Ready' — and positions it for multi-scenario use (peak shaving, EV charging, VPP, temporary scheduling).
Powered by SAJ's elekeeper 5.0 (AI Keeper energy manager + AI Care health guardian) and AI Designer plant-design platform.
In pictures

Inspect it before you spec it.

Official renders, installation photos and system panels for this model line.

Official manufacturer product render
Product

Official manufacturer product render

Documentation

Specifications

Every value exactly as published in the official EK90 HS5-15KT3-X documentation.

Rated AC power15 kW
PhaseThree-phase (3L+N+PE)
Max. PV input30 kW
MPPT trackers3
Max. efficiency98.2%
Whole-home backupbuilt-in 63 A bypass, ≤10 ms switchover
Cell314 Ah LFP
Module (EK90 BU5)6 / 7 / 9 kWh packs
Stackable capacityup to 6 packs → 6–54 kWh
Cycle life10,000 (SAJ datasheet banner states up to 12,000)
Warranty15 years (capacity retention per SAJ warranty policy)
Built-in DC EV chargingAnnounced by SAJcurrently under development and coming soon
V2H / V2GAnnounced by SAJcurrently under development and coming soon
InterfacesWiFi / LAN / RS485
App / EMSelekeeper 5.0 · eManager 5.0 (AI Saving 3.0)
MeteringWireless-pro LoRa meter or DTSU666 + CTs
BrandSAJ
ModelEK90 HS5-15KT3-X
SeriesHS5 (EK90)
TypeThree-phase all-in-one
Three-phase tiers8 / 10 / 12 / 15 / 20 kW
Full datasheet (PDF) Ask an engineer
ProductSAJ EK90 HS5-15KT3-X (15 kW three-phase all-in-one)

Complete the system

Balance-of-system and accessories paired with this model. Every pairing follows the manufacturer's official compatibility list.

Required
SAJ eSolar Wireless-pro Meter
[1]

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
View product →
02
[2]

Chint DTSU666 three-phase meter w/ 3x100A CTs

Where the wireless LoRa meter cannot be used (long distance, metal enclosure, retrofit into an existing three-phase boar
Coming soon
03
[3]

Lazzen NDQ2S-63/3P

On the three-phase EK90 HS5, whole-home backup is built around a transfer switch that lets the entire house load switch
Coming soon
SAJ SAJ ATS Panel
[4]

SAJ SAJ ATS Panel

For installations that want hands-off whole-home backup, the SAJ ATS panel automatically switches the whole-home load (u
View product →
Recommended
Optional
01
[1]

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.
Coming soon
SAJ eManager
[2]

SAJ eManager

For households that want deeper smart-energy control — coordinating extra loads, external meters and tariff-based optimi
View product →
SAJ SAJ Smart Plug
[3]

SAJ SAJ Smart Plug

Enables load shifting: the AI energy manager can turn a specific appliance on when surplus solar or cheap-tariff energy
View product →
Approved pairings

What this unit is approved to run with.

Every pairing below traces to a manufacturer compatibility list, by document version and date. A pairing only one maker lists is marked; we quote it, an engineer confirms it.

SAJ EK90 BU5-6.0-TV battery pack (6 kWh, 314 Ah LFP) SAJ EK90 BU5-6.0-TV battery pack (6 kWh, 314 Ah LFP) Item no. DLK-SAJ-EK90-BU5-6-0-TV On SAJ's compatibility list | 1-6 modules SAJ EK90 BU5-7.0-TV battery pack (7 kWh, 314 Ah LFP) SAJ EK90 BU5-7.0-TV battery pack (7 kWh, 314 Ah LFP) Item no. DLK-SAJ-EK90-BU5-7-0-TV On SAJ's compatibility list | 1-6 modules SAJ EK90 BU5-9.0-TV battery pack (9 kWh, 314 Ah LFP) SAJ EK90 BU5-9.0-TV battery pack (9 kWh, 314 Ah LFP) Item no. DLK-SAJ-EK90-BU5-9-0-TV On SAJ's compatibility list | 1-6 modules

Pick the rating

SAJ HS5 family. Same engineering, different size.

4 ratings Same series, same engineering — your model is highlighted.
SAJ EK90 HS5-10KT3-X (10 kW three-phase all-in-one, 2026 flagship) Sign in for pricing
SAJ EK90 HS5-12KT3-X (12 kW three-phase all-in-one) Sign in for pricing
SAJ EK90 HS5-15KT3-X (15 kW three-phase all-in-one) This model Sign in for pricing
SAJ EK90 HS5-20KT3-X (20 kW three-phase all-in-one) Sign in for pricing
Phase
Same across the family: Three Phase
Max. efficiency
Same across the family: 98.2 %
Ingress protection
Same across the family: IP66

Every figure comes straight from the manufacturer's official datasheet.

Availability & compliance 2

Yes. SAJ's EU datasheet for the three-phase EK90 HS5 confirms German grid compliance.

  • Grid codes: VDE-AR-N 4105 and VDE 0126-1-1 (the German low-voltage grid-connection rules), alongside EN 50549, EN 50438 and EN 62109-1/2
  • Connection: the three-phase models output 3L+N+PE at 230/400 V, 50 Hz, so they connect directly to a standard German three-phase domestic supply
  • Launch context: SAJ showcased the EK90 HS5 at Intersolar Europe / The smarter E 2026 in Munich and indicated German market availability from October 2026 (TaiyangNews live report: https://taiyangnews.info/technology/liveblog-taiyangnews-live-from-the-smarter-e-intersolar-europe-2026)
  • Caveat: SAJ's Intersolar messaging highlighted the single-phase unit for the October 2026 launch, so confirm the exact three-phase (T3) delivery timeline and current certificate revision when you request a quote

Grid: VDE-AR-N 4105 and EN 50549.

  • Battery safety: IEC 62619
  • System safety: validated to UL 9540A / UL 9540B, with a 9-layer protection design (5 battery + 4 system)
  • Marking: CE marked, IP66, and registerable in the German Marktstammdatenregister

Request the certificate set for the exact document versions.

Configuration 3

Both. The EK90 HS5 is an all-in-one system, hybrid inverter plus LiFePO4 battery plus energy management in one modular blind-mate stack, offered as a single-phase line (up to about 10 kW) and a three-phase line.

  • Three-phase ladder: EK90 HS5-xxKT3-X covers 8, 10, 12, 15 and 20 kW at 3L+N+PE 230/400 V
  • Flagship EK90 HS5-10KT3-X: 9,999 W / 9,999 VA rated at 14.5 A per phase, 3 MPPTs, up to 20 kWp recommended PV input (1,000 V max, 150-900 V MPPT range) and 98.2% max efficiency (97.6% European efficiency)

For a customer with an existing single-phase SAJ install, verify the phase configuration and metering before ordering the three-phase unit.

The HS5 battery is fully modular: up to 6 stackable EK90 BU5 modules per system, scaling from 6 kWh to 54 kWh usable.

  • Module sizes: 6 / 7 / 9 kWh (LiFePO4, 100% depth of discharge, 314 Ah cells, high-voltage 600-900 V string, CAN comms)
  • Independent expansion: each module has its own built-in DC-DC optimizer, giving fully independent charge/discharge and, in SAJ's words, "eliminating the wooden-barrel effect" for seamless capacity expansion; modules can be added and effectively mixed later without the whole stack being dragged down to the weakest or oldest module
  • Selectable capacities: 6/7/9/12/14/15/16/18/21/24/25/27/30/28/35/36/40/42/45/50/54 kWh

For a specific mixed-module combination, confirm the pairing against SAJ's battery-combination datasheet.

The HS5 is designed around a bidirectional DC EV-charging module SAJ positions as an "EV-Home-Grid bridge" enabling V2H (vehicle-to-home) and V2G (vehicle-to-grid).

  • Planning caveat: SAJ's own EU datasheet explicitly flags this EV-DC V2H/V2G function as "currently under development and coming soon"; it is a roadmap capability, not a shipping, rated feature at launch, and no charging-power (kW) figure is published in the datasheet
  • Guidance: do not quote a specific EV-charging output for the HS5 yet; if a project depends on bidirectional DC EV charging, confirm the exact availability date, the module part number and its power rating with SAJ before committing, request a quote

Operation & warranty 2

Yes. A 63 A bypass is built in (per phase), so no separate backup box or retrofit is required to back up the whole house. On the 10 kW three-phase model (EK90 HS5-10KT3-X), backup (EPS) output is 10,000 VA continuous with a 20,000 VA / 10 s peak for motor and compressor start-up, and it supports unbalanced single-phase loads up to 5,000 W (the three-phase system tolerates up to 50% of rated power on one phase). Transfer time on grid loss is <=10 ms, fast enough to ride through outages for fridges, heat pumps and IT gear. The bypass current is configurable in the elekeeper app.

Warranty

  • SAJ states a 15-year warranty on the HS5, built on automotive-grade 314 Ah LFP cells rated at 10,000 cycles on the product page
  • SAJ's three-phase EU datasheet rates the cell up to 12,000 cycles under lab conditions (0.2C, 25 C, 60% SOH)
  • Exact capacity-retention and energy-throughput terms follow SAJ's published warranty policy, so request the warranty document for the precise figures you need to quote

Monitoring and ecosystem

  • Monitoring and control run through the elekeeper 5.0 app and eManager 5.0 EMS (AI Saving 3.0, AI Care health monitoring, VPP-ready, 100+ dynamic-tariff integrations), commissioned via a wireless "Wireless-pro" meter with 3-step app setup
  • The same elekeeper ecosystem intelligently coordinates PV, storage, SAJ EV chargers, heat pumps and smart plugs through the elekeeper app
  • Confirm cross-generation battery/hardware compatibility (e.g. older HS2/HS3 modules) with SAJ, since the HS5 uses its own high-voltage EK90 BU5 modules
Next step

Send the project. Hear from an engineer within 24 hours.

Loads, tariff, site constraints - our engineers reply with a compatibility check and a sizing recommendation.

Contact project support

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