Growatt 10kW WIT Series Three-Phase Hybrid Inverter (WIT 10K-HU)

Product Overview: The Growatt WIT 10K-HU is a commercial-grade, highly sophisticated three-phase hybrid solar inverter engineered to anchor premium residential microgrids and light commercial energy ecosystems. Designed to interface seamlessly with high-voltage lithium battery architectures, this 100% unbalanced-load capable 10kW powerhouse bridges dynamic utility grid synchronization with uncompromising, heavy-duty off-grid backup resilience. Driven by integrated advanced EMS logic, multiple MPPT trackers, and flexible multi-source management, the WIT 10K-HU stands as the definitive, future-proof asset for modern microgrids requiring continuous, zero-downtime performance.

PV String Input Data (DC Side)

Designed with 3 independent MPPTs to provide highly versatile string distribution on varied roof orientations, with high current tolerance for modern high-power bifacial panels.

• Max. Recommended PV Power: 15,000 W (15 kW) (Allows for an optimized 150% DC overloading ratio)

• Max. DC Input Voltage: 1000 V

• Start-up Voltage: 160 V

• Nominal DC Voltage: 600 V

• MPPT Operating Voltage Range: 150 V ~ 850 V

• Number of MPPT Trackers: 3

• Max. Strings per MPPT: 1

• Max. Input Current per MPPT ($I_{max}$): 16 A / 16 A / 16 A (Fully compatible with 182mm/210mm high-power modules)

• Max. Short Circuit Current per MPPT ($I_{sc}$): 24 A / 24 A / 24 A

 Battery Interface

Integrates a low-voltage battery system optimized for highly stable, long-cycle commercial or premium residential storage operations.

• Compatible Battery Type: Lithium-ion (LiFePO4) / Lead-acid

• Nominal Battery Voltage: 48 V

• Battery Voltage Range: 40 V ~ 60 V (Safe low-voltage system with high current throughput)

• Max. Continuous Charging Current: 200 A

• Max. Continuous Discharging Current: 200 A

• BMS Communication Ports: CAN / RS485 (Enables closed-loop real-time telemetry with major 48V energy storage systems)

 AC Output/Input Data (On-Grid)

Parameter	Value
Nominal AC Output Power	10,000 W (10 kW)
Max. AC Apparent Power to Grid	10,000 VA (Up to 11,000 VA maximum peak export headroom under regional utility approvals)
Max. AC Input Power from Grid	20,000 VA (20 kVA) (Ample pass-through allowance for grid bypass charging)
Nominal Grid Voltage	230V / 400V (Three-Phase / 3L+N+PE)
Nominal AC Grid Frequency	50 Hz / 60 Hz (Auto-sensing)
Max. AC Output Current to Grid	15.2 A
Power Factor	>0.99 (0.8 leading to 0.8 lagging adjustable)
Output THDi (@Nominal Power)	< 3%
Three-Phase Unbalanced Load Support	100% Three-Phase Unbalanced Load Capability (Maintains stable phase voltage even under heavily uneven phase-to-neutral household consumption)

AC Output Data (Back-up / EPS Mode)

• Back-up Rated Power: 10,000 W (10 kW)

• Max. Back-up Apparent Power: 10,000 VA

• Peak Apparent Power: 15,000 VA (10 Seconds duration) / 20,000 VA (100 Milliseconds duration) (Exceptional transient capacity to easily absorb high-surge inductive loads like commercial cooling units or workshop machinery)

• Automatic Switchover Time: < 10 ms (UPS-level seamless backup transfer to guarantee continuous operation for critical server and automation racks)

• Nominal Output Voltage: 230V / 400V (± 2%)

• Nominal Output Frequency: 50 Hz / 60 Hz (± 0.2%)

• Output Voltage THDv (@Linear Load): < 3%

Efficiency & Protection Framework

• Max. Efficiency: 98.0%

• European Efficiency: 97.2%

• MPPT Tracking Efficiency: 99.9%

• Integrated Safety Protections: PV String Isolation Resistor Detection, Residual Current Monitoring Unit (RCMU), Output Overcurrent Protection, Output Short Circuit Protection, Output Overvoltage Protection, Battery Reverse Polarity Protection, and Anti-islanding Protection.

• Surge Protection: Integrated Type II DC Surge Protection and Type II AC Surge Protection for excellent localized atmospheric immunity.

• Smart Safety Function: Integrated AFCI Protection (Arc Fault Circuit Interrupter) available to mitigate high-voltage DC wiring arc risks.

General & Mechanical Specifications

• Dimensions (W × H × D): Approx. 515 × 710 × 245 mm (Subject to localized high-power chassis and internal component structural variation)

• Net Weight: ~ 42.0 kg

• Cooling Concept: Smart forced-air cooling (Temperature-controlled variable-speed fan routing)

• Ingress Protection Rating: IP66 (Superior industrial dustproof and waterproof build rating, engineered for uncompromised indoor and harsh outdoor installations)

• Operating Temperature Range: -30°C to +60°C (Smart power derating applies above 45°C)

• Relative Humidity: 0% ~ 100% (Non-condensing)

• Max. Operating Altitude: 4,000 m

• Parallel Capability: Scalable up to 6 units in parallel, expanding system capacity up to 60kW.

• Communication Options: RS485, CAN, Wi-Fi, LAN, Cellular GPRS/4G (Supports comprehensive telemetry routing and remote parameter tracking via the ShinePhone app ecosystem).

High-End Technical Highlights

•  3-Phase Phase-Level Unbalanced Load Sharing

  • 100% Three-Phase Unbalanced Output: Supports up to 100% unbalanced load capacity on each individual phase, allowing highly flexible and stable power distribution when handling diverse single-phase and three-phase domestic or light commercial appliances.

  • High-Voltage Battery Efficiency: Engineered for high-voltage battery systems to maximize system-level round-trip efficiency, drastically reducing thermal losses and installation footprint compared to traditional low-voltage high-current alternatives.

  • Massive DC/AC Oversizing: Allows substantial PV string oversizing to ensure optimal battery charging and peak continuous loads are covered even under low-irradiation or adverse winter weather conditions.

• ⚡ Grid Resilience & Ultimate Multi-Source Microgrid Control

  • True UPS-Class Switching (<10ms): Features an ultra-fast emergency power supply (EPS) transition time of under 10 milliseconds, guaranteeing zero reset or interruption for sensitive IT servers, security infrastructure, and home automation systems during grid failures.

  • Generator Automation & Dry Contacts: Outfitted with robust built-in dry contact controls to seamlessly orchestrate local diesel, petrol, or gas backup generators, creating an autonomous local grid safety net during prolonged grid outages.

  • AC-Coupling & Retrofit Friendly: Built to easily integrate via AC-coupling with existing standard on-grid solar string inverters, upgrading legacy photovoltaic plants into flexible, dynamic energy storage stations without replacing older hardware.

• 🛡️ Industrial Reliability & Smarter Operations

  • Heavy-Duty IP66 Structural Protection: Upgraded to a ruggedized, weather-sealed IP66-rated casing, safeguarding delicate power electronics against heavy monsoon driving rain, fine dust, and corrosive humid environments.

  • Smart Active Cooling & Thermal Intelligence: Utilizes redundant, intelligent cooling fan systems to maintain optimal internal operating temperatures, ensuring no power derating even under continuous full-load environments in high-ambient climates.

  • AI-Enhanced ShineServer O&M Ecosystem: Fully integrated into Growatt’s global ShineServer and ShinePhone App infrastructure, granting installers the leverage to execute remote parameter tuning, complete OTA firmware updates, and perform precise string-level curve diagnostics.