Description

Growatt WIT 20K-HU Hybrid Inverter: 20kW Three-Phase Energy Storage Solution for Residential & Commercial Solar Systems

The Growatt WIT 20K-HU is a powerful three-phase hybrid inverter designed for demanding residential and small-to-medium commercial solar + storage installations. With a nominal AC output of 20 kW, support for high-current PV modules, and seamless low-voltage battery integration, this Growatt WIT 20K-HU hybrid inverter delivers outstanding performance, reliability, and flexibility.

Engineered with a 1.6 DC/AC ratio, IP66 protection, and advanced hybrid capabilities, the Growatt WIT 20K-HU maximizes self-consumption, provides fast UPS backup, and scales easily in parallel systems. Whether you need whole-home backup power or optimized commercial energy management, this inverter from the Growatt WIT series offers one of the best price-performance ratios on the market.

Key Technical Features of the Growatt WIT 20K-HU Inverter

• High-Yield MPPT Design: Maximum string current up to 20 A and PV input voltage up to 1000 V DC — fully compatible with modern high-power solar modules.
• Recommended PV Power: Up to 40 kW (STC), with 4 MPPT trackers for superior energy harvest even in partial shading.
• Superior Efficiency: Maximum efficiency 97.6%, European efficiency 97.0%.
• Rugged & Silent Operation: IP66 protection rating, transformerless design, natural convection cooling with intelligent smart ventilation — quiet, low-maintenance, and perfect for outdoor installation.
• Comprehensive Communication: Supports Modbus TCP, RS485, CAN, and USB for easy integration with monitoring platforms like ShinePhone and ShineServer.
• Enhanced Safety: Built-in AFCI (Arc Fault Circuit Interruption) for maximum fire protection.
• Compact & Easy to Install: Dimensions approx. 475 × 698 × 240 mm, weight around 43–45 kg — lightweight for its class and installer-friendly wall mounting.
• Extra Overload Capacity: 110% continuous AC overloading capability.

These features make the Growatt WIT 20K-HU an ideal choice for high-performance hybrid solar systems.

Battery Compatibility – Growatt AXE & Third-Party Low-Voltage Batteries

The Growatt WIT 20K-HU works perfectly with low-voltage batteries (40–60 V range):

• Full compatibility with Growatt AXE 5.0L LiFePO4 batteries (51.2 V, 5 kWh) and a wide range of third-party LiFePO4 and lead-acid batteries.
• Maximum charge/discharge current: up to 290–420 A (model-specific peak).
• Maximum battery power up to 25.2 kW.
• Dual battery inputs for flexible configurations.
• Supports both DC-coupled and AC-coupled systems.
• Intelligent BMS communication for safe and optimized operation.

This broad compatibility gives you complete freedom to design the perfect energy storage solution.

Hybrid Functions & Reliable Backup Power

Enjoy true energy independence with the Growatt WIT 20K-HU:

• EPS (Emergency Power Supply) with ultra-fast UPS switching time <20 ms — seamless transition to off-grid mode during power outages.
• 100% unbalanced output across phases for maximum flexibility with real-world loads.
• Zero-export / export limitation function (with external CT or meter).
• Built-in generator input (380/400 Vac) and smart load management to prioritize critical appliances and maximize autarky.
• Bypass mode and black-start capability.

The result is lower electricity bills, reduced grid dependence, and continuous power supply when the grid fails.

Scalability & Parallel Operation – Up to 90 kW+

The Growatt WIT 20K-HU supports parallel connection of multiple units (typically up to 3–10 units depending on configuration), allowing system expansion up to 90 kW with automatic load balancing.

Parallel installation highlights:

• Dedicated CAN and RS485 communication cables between master and slave units.
• Simple configuration via the ShinePhone app: set Parallel mode, assign master/slave roles, and calibrate DC voltages.
• Individual PV and AC connections per unit with phase synchronization.
• Post-install verification: current difference between units <0.5 A.

Best practices: Use common grounding and avoid ground loops for maximum stability. Perfect for growing residential or small commercial projects.

Applications & Benefits of the Growatt WIT 20K-HU Hybrid Inverter

The Growatt WIT 20K-HU is the perfect solution for:

• Large family homes and villas with high energy demand.
• Small commercial buildings, offices, or workshops.
• Installations aiming for maximum self-consumption and fast ROI.

Key Benefits:

• Economic: Store surplus solar energy, significantly reduce grid bills, and achieve a quick return on investment thanks to high efficiency and low maintenance.
• Energy Independence: Reliable UPS backup with <20 ms switchover and off-grid capability.
• Environmental: Maximize autarky, minimize CO₂ emissions, and support a greener lifestyle.
• Future-Proof: Scalable design, generator support, wide battery compatibility, and ready for evolving energy needs.

Ready to power your 20 kW solar + storage project?

Discover the Growatt WIT 20K-HU at Growatt.tech — your trusted source for premium hybrid inverters.

Contact our solar specialists today for expert system design, competitive pricing, technical support, and fast delivery.

Growatt WIT 20K-HU – Powerful. Reliable. Future-Ready.