Growatt

Growatt WIT 18K-HU Hybrid Inverter 18kW Three-Phase

SKU: 2776

✓︎ 18 kW rated power, three-phase for large systems
✓︎ Backup-capable with 200% overload for 10 seconds
✓︎ 2 MPP trackers & up to 420 A battery charging current

Available from: 23.10.2026 (Pre-orders possible)

Delivery time: 4 - 5 weeks

1.690,00 €

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Growatt WIT 18K-HU Hybrid Inverter 18kW Three-Phase

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Description

Growatt WIT 18K-HU is a powerful three-phase hybrid inverter for demanding photovoltaic systems with battery storage. With 18 kW rated power, it is ideal for large homes, commercial properties, and agricultural operations that want to optimally use their solar power and ensure reliable backup power supply.

Key Benefits for Your System

High system output: With 18 kW output power, you can reliably supply even large consumers with your own solar power.
Reliable backup power supply: In the event of a grid outage, the inverter switches to backup power in under 10 ms and delivers up to 200% output for 10 seconds.
Flexible design: Two MPP trackers with 2 strings each enable optimal connection of module arrays with different orientations.
Scalable & versatile: Up to 10 units can be connected in parallel, and a generator input and smart load management are also integrated.

Intelligent Use of Your Solar Power

The Growatt WIT 18K-HU hybrid inverter connects your photovoltaic system, battery storage, and the power grid into one intelligent energy system. Solar power generated during the day is preferentially used for self-consumption, while surplus energy charges the connected battery storage – with up to 420 A charging current even for large capacities. This means stored energy is available to you in the evening and at night, significantly increasing your self-consumption and reducing your electricity costs. Thanks to 100% unbalanced output power, each phase can deliver up to 50% of rated power, offering maximum flexibility for single-phase loads. Via WiFi, LAN, and the corresponding app, you can conveniently monitor your system at any time.

GENERAL DATA (Basic information about the inverter)
Manufacturer	Growatt
Model	WIT 18K-HU
Device type	Hybrid inverter, three-phase
Topology	Transformerless
Dimensions (W/H/D)	475 × 695 × 241 mm
Weight	58 kg
Protection rating	IP66
Cooling	Smart Air Cooling
Operating temperature	−30 °C … +60 °C (> 45 °C, derating)
Warranty	5 years (10 years optional)
INPUT DATA (PV) (Solar array connection)
Max. recommended PV power	36000 W
Max. input voltage	1000 V
Start voltage	180 V
Rated voltage	625 V
MPPT operating voltage range	150 – 850 V
Max. input current per MPP tracker	40 A
Max. short-circuit current per MPP tracker	50 A
Number of MPP trackers	2
PV strings per MPP tracker	2
AC INPUT/OUTPUT (GRID) (Grid connection)
Rated input/output power (grid)	36000 W / 18000 W
Max. apparent input/output power (grid)	39600 VA / 19800 VA
Max. input/output current (grid)	60 A / 30 A
Max. input current (GEN/AC couple)	54.55 A / 27.27 A
Rated AC voltage range	220V/380V, 230V/400V, 240V/415V, −15% – +10%
Rated grid frequency range	50/60 Hz, 45 – 55 Hz / 55 – 65 Hz
Adjustable power factor	−1 … +1
THDi	< 3%
AC grid connection type	3P+PE / 3P+N+PE
BATTERY DATA (DC) (Storage connection)
Battery type	Lead-acid or lithium-ion
Battery voltage range	40 – 60 V
Max. charge/discharge current	420 A
Recommended battery voltage	51.2 V
BMS communication	RS485 / CAN
BACKUP POWER (AC) (Backup power supply)
Rated AC output power	18000 W
Max. AC apparent power	2x rated power, 10 s
Rated AC output voltage	220V/380V, 230V/400V, 240V/415V
Rated AC output frequency	50/60 Hz
Max. output current	54.55 A
THDv	3% (with linear load)
Load imbalance	100% three-phase unbalanced
On-/off-grid switching time	< 10 ms
EFFICIENCY & COMMUNICATION (Efficiency and interfaces)
Max. efficiency	97.6%
European efficiency	97%
MPPT efficiency	99.90%
Display	OLED / LED + app
Interfaces	RS485 / USB, WiFi / LAN
Noise	≤ 55 dB(A)
Certifications	IEC 62109, IEC 61000, IEC 61727, IEC 62116, EN 50549, VDE 4105, IEC 61683, IEC 60068

Scope of Delivery

Growatt WIT 18K-HU hybrid inverter
Mounting bracket
Connection plugs / connectors
User manual

Datenblatt

Benutzerhandbuch

Kurzanleitung