Deye Hybrid Inverter Three Phase 15kW, 18kW, 20kW

The Deye three phase hybrid inverter SUN-15/18/20K-SG05LP3-AU-SM2 is a high-capacity low voltage energy solution designed for residential, commercial and demanding solar applications requiring flexible PV generation, battery storage and backup power management.

Available in 15kW, 18kW and 20kW models, this three-phase hybrid inverter supports 48V low voltage batteries with a transformer isolation design, providing a reliable connection between solar generation, battery storage and electrical loads. The system supports both lead-acid and lithium-ion batteries with automatic BMS adaptation for compatible lithium battery systems.

The inverter range provides strong PV input capability with models supporting up to 30kW, 36kW and 40kW maximum PV access power, depending on the selected capacity. With a wide MPPT voltage range of 160–650V, two MPPT trackers and two strings per tracker, the system provides flexibility for complex solar array configurations.

Designed for energy independence, the inverter supports on-grid and off-grid operation, AC coupling for existing solar systems, parallel operation of up to 10 units, and energy storage from diesel generators. Its ability to provide 100% unbalanced output on each phase makes it suitable for installations where phase loads vary significantly.

With intelligent energy management, high battery charging capability and multiple operating modes, the Deye SUN-15/18/20K-SG05LP3-AU-SM2 provides installers and system designers with a flexible platform for advanced solar-plus-storage projects.

Key Features of DEYE Low Voltage Hybrid Inverter Three Phase 15kW, 18kW, 20kW

Three Phase Hybrid Design

The SUN-15/18/20K-SG05LP3-AU-SM2 is designed as a three-phase hybrid inverter solution, supporting 230/400V and 240/415V output configurations with a 3L+N+PE grid connection structure.

48V Low Voltage Battery Compatibility

The inverter uses a 48V low voltage battery architecture with transformer isolation design. It supports both lead-acid and lithium-ion batteries, with automatic BMS adaptation for lithium battery communication.

High Battery Charging & Discharging Capability

Battery current capability scales according to model capacity:

• 15kW model: up to 280A charging/discharging current
• 18kW model: up to 330A charging/discharging current
• 20kW model: up to 350A charging/discharging current

This enables efficient battery energy transfer for larger solar storage systems.

High PV Input Capacity

The inverter supports large PV arrays:

• 15kW model: up to 30kW PV access power
• 18kW model: up to 36kW PV access power
• 20kW model: up to 40kW PV access power

The system supports a maximum PV input voltage of 800V and MPPT operating range from 160V to 650V.

Flexible Solar Design with Dual MPPT

With two MPPT trackers and a 2+2 string configuration, installers can design PV arrays with different orientations while maintaining efficient solar tracking.

Unbalanced Load Support

The inverter supports 100% unbalanced output across each phase, with maximum output up to 50% rated power per phase. This helps maintain stable operation where electrical loads are unevenly distributed.

Parallel System Expansion

Up to 10 units can operate in parallel for both on-grid and off-grid applications. Multiple batteries can also be connected in parallel to expand system capacity.

AC Coupling Capability

The inverter supports AC coupling, allowing it to be integrated into existing solar installations where additional battery storage functionality is required.

Generator Energy Storage Support

The system supports storing energy generated from diesel generators, providing additional flexibility for hybrid power systems.

Intelligent Protection System

Integrated protection functions include:

• DC reverse polarity protection
• AC output overcurrent protection
• Thermal protection
• AC output overvoltage protection
• AC short circuit protection
• Insulation impedance detection
• DC switch
• Anti-islanding protection
• Residual current detection

The inverter also includes Type II surge protection for both DC and AC sides.

Main Benefits

For Commercial Solar Installers

The Deye 20kW hybrid inverter provides a high-capacity platform for projects requiring larger PV input, higher battery current and flexible energy management.

With up to 40kW PV access power and 350A battery charging/discharging capability, installers can design systems with significant solar generation and storage capacity while maintaining compatibility with low voltage battery systems.

The three-phase configuration also helps distribute electrical loads efficiently, making the system suitable for larger residential properties, commercial buildings and industrial applications.

For Solar Engineers & System Designers

Engineers benefit from the inverter’s flexible architecture, including dual MPPT tracking, wide voltage operating range and multiple operating configurations.

The ability to connect multiple units in parallel provides scalability for future expansion, while AC coupling support allows integration with existing PV systems.

The 100% phase unbalanced output capability provides additional design flexibility when loads are not evenly distributed between phases.

For EPC Contractors

For EPC contractors, installation efficiency is improved through integrated communication options and simplified system architecture.

The inverter includes LCD display and communication interfaces including WiFi, RS485 and CAN, allowing easier monitoring and system integration.

The IP65 protection rating and intelligent air cooling system provide installation flexibility while maintaining reliable operation in suitable environments.

For Energy Storage System Owners

For users looking to increase energy independence, the inverter provides multiple ways to manage energy usage.

Six programmable charging and discharging time periods allow users to configure battery operation according to their energy requirements.

The system can combine solar generation, battery storage, grid supply and generator input into one coordinated energy management solution.

Installation

Installation should only be completed by qualified electrical professionals following Deye installation requirements and local electrical regulations.

1. Select the Installation Location

Choose a suitable vertical mounting location with enough space for ventilation and maintenance access.

The inverter should be installed in an area protected from unsuitable environmental conditions while maintaining airflow for the intelligent cooling system.

The inverter operates within a temperature range of -40°C to +60°C, with output derating above 45°C. Maximum permitted altitude is 3000m.

2. Mount the Inverter

Secure the inverter onto a suitable wall or mounting structure using appropriate fixing hardware.

The inverter dimensions are:

456 × 750 × 268.5mm

with a weight of approximately:

51.9kg

Ensure the mounting surface can safely support the inverter weight before installation.

3. Connect Battery System

Connect the compatible 48V battery system according to the wiring requirements.

The inverter supports automatic BMS adaptation for lithium-ion batteries, allowing communication between inverter and battery management systems.

Before commissioning, verify battery polarity and communication wiring.

4. Connect PV Inputs

Connect PV strings according to the MPPT configuration.

The inverter provides:

• Maximum PV input voltage: 800V
• MPPT voltage range: 160–650V
• Two MPPT trackers
• Two strings per tracker

These specifications allow installers to configure multiple PV string layouts efficiently.

5. Connect AC Grid, Loads & Communication

Connect:

• Three-phase grid connection
• Backup loads
• Communication cables
• Monitoring accessories

The inverter supports WiFi, RS485 and CAN communication interfaces for monitoring and system integration.

6. Commission the System

After completing all wiring:

1. Check all electrical connections.
2. Confirm correct polarity and communication.
3. Power on the battery system.
4. Activate the inverter.
5. Configure operating settings through the LCD interface.

The installer can configure battery charging periods, operating modes and system parameters according to project requirements.

Deye

Ningbo Deye Inverter Technology Co., Ltd. develops solar inverter and energy storage solutions for residential, commercial and industrial applications.

Deye focuses on integrated renewable energy technologies including photovoltaic inverters, hybrid inverters and energy storage systems. Its products are designed to support flexible solar generation, battery storage and intelligent energy management.

Through continuous product development and global deployment, Deye provides inverter solutions designed for modern energy systems requiring reliability, efficiency and scalability.