SAJ H2-25K-T3
Description
Bypassing central NA-Schutz relays while absorbing 60 kWp solar generation.
SAJ H2-30K-T3-DE is a 29.99 kW German-certified commercial three-phase hybrid inverter with 60 kWp solar intake and 3 MPPTs, factory-capped at 29,999 VA to bypass mandatory central NA-Schutz relay requirements under VDE-AR-N 4105.
29,999 W Certified Export Cap
Sits strictly beneath 30 kVA thresholds, eliminating expensive external central grid protection switchgear.
60,000 Wp Massive Solar PV Intake (200% Ratio)
Absorbs large commercial arrays into building consumption and high-voltage storage.
3 Independent 40 A MPPT Trackers
Eliminates string mismatch across 3 distinct warehouse roof pitches, accepting 6 strings of high-power bifacial modules.
100% Phase Unbalanced Output
Dynamically diverts power to heavily loaded single-phase commercial equipment without drawing grid electricity.
More product details
In Germany, exceeding 30.0 kVA triggers a mandatory requirement for external central grid protection relays (*Zentraler NA-Schutz*), adding €3,000. €5,000 in hardware and inspection delays. The H2-30K-T3-DE is factory-certified at 29,999 VA, allowing maximum allowable solar generation while remaining fully exempt.
- Factory firmware limits maximum continuous apparent power to 29,999 VA, streamlining low-voltage utility permitting.
- Connects up to 60,000 W of rooftop solar, routing generation above 29.9 kW directly into high-voltage storage.
- 3 MPPT channels allow dedicated tracking for East, South, and West warehouse pitches with zero inter-string mismatch.
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4 models
Rated AC power
30 kW
25 kW
15 kW
20 kW
Phase
Three-phase
Three-phase
Three-phase
Three-phase
MPPT trackers
3
3
3
3
Max. efficiency
98.0 %
98.0 %
98.0 %
98.0 %
Battery voltage
180~800 V
180~800 V
180~800 V
180~800 V
Ingress protection
IP65
IP65
IP65
IP65
Weight
50 kg
50 kg
50 kg
50 kg
Dimensions
576*659*242 mm
576*659*242 mm
576*659*242 mm
576*659*242 mm
Faster battery charging with dynamic single-phase load compensation.
Featuring a heavy-duty 50 A battery interface (180–800 V) and 100% phase-unbalanced capability, the inverter charges storage rapidly while eliminating grid import penalties on asymmetric loads. 50 A charge/discharge throughput tops off 25–50 kWh battery stacks faster during brief midday solar peaks. Dynamically shifts up to 100% of capacity onto a single heavily loaded phase to prevent utility grid purchases. IP65 cast-aluminum casing allows clean indoor utility mounting or outdoor sheltered installation (-40 to +60 °C).
45 kWp with the 25K, not beyond it
150% oversizing uses the same family roof cap. Extra AC does not buy a larger array than the 25K already allows
Top backup on this chassis
30 kVA continuous and 45 kVA for three seconds, with UPS switchover in 20 ms or less on the same dual-port B2 interface
Technical data
Maximizing commercial solar generation while eliminating grid approval hurdles and equipment costs.
29.99 kW German-certified grid cap to bypass mandatory central NA-Schutz relays.
Tailored specifically for the German commercial market (VDE-AR-N 4105), the H2-30K-T3-DE locks AC output at exactly 29,999 W / 29,999 VA. This precision limit keeps commercial installations beneath the 30 kVA threshold requiring central grid protection (*Zentraler NA-Schutz*), while still absorbing up to 60,000 Wp of rooftop solar across 3 high-current MPPT channels.
- Certified Export Cap
- 29,999 VA
- 200% Solar DC Intake
- 60,000 Wp
- High-Rate Battery Port
- 50 A
- High String Current
- 40 A / MPPT
Inverter
- Phase
- 3
- Topology
- Non-isolated
Solar Input
- Max. PV array power (Wp @STC)
- 45 kWp
- Max. DC voltage (V)
- 1000
- MPPT voltage range (V)
- 180 ~ 900
- Rated DC voltage (V)
- 600
- Max. DC input current (A)
- 40 / 40 / 40
- Max. DC short circuit current (A)
- 50 / 50 / 50
- Strings per MPP tracker
- 2 / 2 / 2
Battery
- Battery type
- LiFePO4
- Battery voltage range (V)
- 180 ~ 800
- Max. charging / discharging current (A)
- 50 / 50
- Number of battery inputs
- 2
Grid & Backup Output
- Rated AC power (W)
- 30 kW
- Max. apparent power (VA)
- 30 kVA
- Rated output current (A @230 Vac)
- 43.4
- Max. output current (A)
- 43.4
- Rated AC voltage (V)
- 3L+N+PE, 220/380, 230/400, 240/415; 180 ~ 280 / 312 ~ 485
- Rated output frequency / range (Hz)
- 50, 60 / 45 ~ 55, 55 ~ 65
- Peak output apparent power (VA)
- 45 kVA, 3 s
Efficiency
- Max. efficiency
- 98.0%
- Euro efficiency
- 97.6%
Physical
- Operating temperature range
- -40 C to +60 C (45 C and above with derating)
- Noise (dBA)
- <50
- Ingress protection
- IP65
- Dimensions (H x W x D mm)
- 576 x 659 x 242
- Weight (kg)
- 50
- Warranty (year)
- 10
Project fit
Where this model fits.
Scenarios that show which projects the SAJ H2-30K-T3-DE belongs in, what to verify before quoting, and when another model is the better pick.
Project scenario
German Commercial Roofs (40–60 kWp PV) on Low-Voltage Grid
Commercial workshops, agricultural barns, and logistics offices in Germany subject to VDE-AR-N 4105 low-voltage connection rules.
When a roof accommodates 40–60 kWp, installing a standard 30 kW+ inverter legally mandates an external central NA-Schutz relay cabinet. The H2-30K-T3-DE delivers maximum allowable feed-in (29,999 VA), accepts up to 60 kWp solar array, but saves thousands of euros in switchgear and weeks of grid approval delays.
- BoundaryIf total commercial solar capacity is under 45 kWp and building loads stay under 25 kW, step down to the H2-25K-T3 to save capital expenditure. ---
What Linker confirms with you
- If total commercial solar capacity is under 45 kWp and building loads stay under 25 kW, step down to the H2-25K-T3 to save capital expenditure. ---
Documents
SAJ H2 10-30K Three Phase Hybrid Inverter datasheet (Europe, EN) SAJ H2 Series (10-30K) T2/T3 Datasheet (EN, BEU)Product questions
Why does this DE model lock power at 29,999 W instead of 30,000 W?
To stay strictly under the 30.0 kVA German NA-Schutz threshold. Under German grid code VDE-AR-N 4105, systems with total generation capacity $>30.0\text{ kVA}$ must install an external central grid and plant protection unit (*Zentraler NA-Schutz*). Capping the unit at exactly 29,999 W / 29,999 VA guarantees full exemption from external protection relays.
If AC export is capped at 29.99 kW, what happens to extra power from a 60 kWp solar array?
Surplus power above 29.99 kW is routed directly into battery storage. When solar generation peaks at 45–60 kW at midday, the inverter exports its maximum allowed 29.99 kW to the building loads and grid, while simultaneously channeling the remaining 15–30 kW of DC power directly into connected high-voltage battery storage via its 50 A battery port.
System components
Recommended components
SAJ B2 HV battery system (BC2-HV1 control unit + BU2-5.0-HV1/HV5 modules, 5.0–25.0 kWh stackable)
Item number: DLK-SAJ-B2100HV1
SAJ's H2/HS2/HS3/AS2/AS3 Configuration Instructions V1.0, Section 2, names 'H2 series storage inverter and BU2 series battery; or BC2 series battery control unit' as the required device set for H2
Chint DTSU666 three-phase meter
Item number: DLK-CHINT-DTSU666
Same DTSU666 model SAJ specifies in its own accessories catalogue (saj_smart_meters_dtsu666_en.pdf) for smart-meter/CT integration on three-phase systems
Optional components
SAJ ATS1-T63-A automatic transfer switch (three-phase, 63A)
Item number: DLK-SAJ-ATS1T63A
ATS1's own datasheet compatible-inverter row lists H2-15/20/25/30K-T3 by name
Approved pairings
SAJ B2-10.0-HV1Item number DLK-SAJ-B2100HV1B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ B2-10.0-HV5Item number DLK-SAJ-B2100HV5B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ B2-15.0-HV1Item number DLK-SAJ-B2150HV1B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ B2-15.0-HV5Item number DLK-SAJ-B2150HV5B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ B2-20.0-HV1Item number DLK-SAJ-B2200HV1B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ B2-20.0-HV5Item number DLK-SAJ-B2200HV5B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ B2-25.0-HV1Item number DLK-SAJ-B2250HV1B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ B2-25.0-HV5Item number DLK-SAJ-B2250HV5B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ B2-5.0-HV1Item number DLK-SAJ-B250HV1B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ B2-5.0-HV5Item number DLK-SAJ-B250HV5B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ BC2-HV1Item number DLK-SAJ-BC2HV1B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ BU2-5.0-HV1Item number DLK-SAJ-BU250HV1B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ BU2-5.0-HV5Item number DLK-SAJ-BU250HV5B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ CB3-HVCItem number DLK-SAJ-CB3HVCB2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ CB3-L261Item number DLK-SAJ-CB3L261B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
SAJ CB3-M20Item number DLK-SAJ-CB3M20B2-5.0-HV1 to B2-25.0-HV1 and B2-5.0-HV5 to B2-25.0-HV5, through the BC2-HV1 control module. SAJ's Configuration Instructions V1.0 state the system as H2 plus BC2 plus BU2. CAVEAT: the signed statement is SAJ's Oceania issue and names the -AU model variants. Ask SAJ to confirm the EU and DE variants in writing before a first order.
