Deye 12 kW Three-Phase Hybrid Inverter – SUN-12K-SG05LP3-EU-SM2

Deye SUN-12K-SG05LP3-EU-SM2: 12 kW three-phase low-voltage, 4 strings, the most powerful model in the range

The Deye SUN-12K-SG05LP3-EU-SM2 is the flagship model of the SG05LP3 series: with 12,000 W active AC (13,200 VA), a PV input of 15,600 W and 4 physical strings across 2 independent MPPT trackers, it stands out as the benchmark for large three-phase photovoltaic installations with a 48 V low-voltage battery. It is designed for large, high-consumption homes, SMEs and three-phase commercial buildings, as well as agricultural installations seeking to maximise self-consumption without investing in a high-voltage battery.

4 strings, 26 A per MPPT: maximum flexibility for complex rooftops

The main difference between the SUN-12K and the 8K and 10K models lies in its PV input topology: 4 physical strings (2+2) distributed across 2 independent MPPT trackers. This configuration allows up to 4 separate strings of panels to be connected — ideal for multi-pitch, multi-orientation (East/West + South) or partially shaded roofs. Each MPPT supports up to 26 A (max short-circuit 39 A), making it compatible with very high-power solar modules (600–700 Wp).

• Nominal AC power: 12,000 W active / 13,200 VA max
• Max PV input: 15,600 W — 2 MPPT (200–650 V, max 800 V) — 4 strings (2+2)
• Max. PV input current: 26 A per MPPT | Max. short-circuit current: 39 A per MPPT
• Max efficiency: 97.6% — Euro: 97.0% — MPPT: ≥ 99%
• THDi < 3% — Power factor: 0.8 input to 0.8 output (adjustable)
• Nominal AC current: 17.4 A / phase | max 19.2 A / phase

48V battery storage: 240 A, the highest current in the SG05LP3 range

The SUN-12K-SG05LP3-EU-SM2 achieves a maximum charge/discharge current of 240 A — the highest in the SG05LP3 low-voltage range. At a nominal 51.2 V, this represents a charging power of up to ~12.3 kW, enabling a large battery bank to be recharged in record time during solar production peaks. BMS management is fully automatic via CAN, RS485 or RS232.

Battery compatibility table

👉 Download the full Deye battery compatibility list (PDF)

Comprehensive energy management: Time of Use, Peak Shaving, generator, zero-injection

• 6 Time of Use time slots: charge during off-peak hours, discharge during peak hours
• Peak Shaving: limit power drawn from the grid, avoid exceeding your contracted power limit
• Self-consumption mode: solar priority, battery charging with surplus energy
• Zero-injection mode: ideal for Belgian prosumers without a feed-in tariff agreement
• Off-grid / backup mode: autonomous power supply via battery + panels in the event of a power cut
• GEN port: generator compatibility for battery charging during low production
• Battery-free mode: pure grid-tied inverter operation
• Parallel operation: up to 16 units — installations up to 192 kW three-phase low voltage

👉 Compare the SUN-12K with other models in our Comprehensive Guide to Hybrid Inverters 2025.

Monitoring via SolarmanSmart

Native WiFi and Bluetooth for immediate connection to SolarmanSmart. Real-time monitoring, alerts, history and remote firmware updates. GPRS, 4G and LAN options available for sites without WiFi.

• Native WiFi + Bluetooth — GPRS, 4G, LAN optional
• Immediate remote shutdown in an emergency
• Multi-site monitoring for professional installers

Installation

• Wall mounting — weight: 35.2 kg | Dimensions: 386 × 660 × 250 mm
• IP65 — indoor and outdoor | Altitude: ≤ 3,000 m
• Temperature range: -40°C to +60°C (derating > 45°C)
• Noise: ≤ 55 dB | 3L + N + PE | 50/60 Hz
• Standards: EN 62109-1/2, EN 50549, IEEE 1547.1

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Main Screen

The LCD screen is touch-sensitive and displays general information about the inverter.

1 • The icon in the centre of the home screen indicates that the system is operating normally. If it displays "comm./F01~F64", this means the inverter has communication errors or other faults. The error message will appear below this icon (errors F01-F64; details of the errors can be viewed in the System Alarms menu).

2 • The time is displayed at the top of the screen.

3 • System configuration icon. Press this button to access the system configuration screen, which includes basic configuration, battery configuration, grid configuration, system operating mode, generator port usage, advanced functions and Li-Ion battery information.

4 • The main screen displays information regarding solar, grid, load and battery. It also indicates the direction of energy flow using arrows. When power approaches a high level, the colour of the panels changes from green to red, allowing system information to be clearly viewed on the main screen.

- PV power and charging power always remain positive.

- A negative grid power reading indicates power being sold to the grid; a positive reading indicates power being drawn from the grid.

- A negative battery power reading indicates charging; a positive reading indicates discharging.

Remote shutdown function

Smart monitoring platform

Thanks to the smart monitoring platform, the entire Deye series of inverters supports immediate remote shutdown in the event of a fault. Remote parameter adjustment and firmware updates facilitate the operation and maintenance of photovoltaic installations.

Inverter operation with Pylontech batteries

Discover the advanced features of Deye hybrid inverters

Optimise your solar installation and manage your energy consumption more efficiently with videos dedicated to Deye hybrid inverters. Discover the best features and applications of this innovative technology. Simply click on the title to access the corresponding video.

1. Peak shavingfunction of the Deye hybrid inverter

Learn how to use the Peak Shaving function to reduce your energy consumption during peak demand periods and thus optimise your energy costs.

2.Priority Feed-in Mode for the Deye hybrid inverter( )

Discover the Deye hybrid inverter’s first sales mode – a must-watch video to understand how to present and sell this product.

3. Configuration withPylontech lithium-ion battery

Follow our guide to connect and configure a Deye inverter with a Pylontech lithium-ion battery to maximise the efficiency of your installation.

4. Time of Usefunction on the Deye hybrid inverter

Optimise your energy consumption according to the time of day with the Time of Use function, to better manage your energy costs.

5. Using the Deye hybrid inverter’s smart charging

Maximise the efficiency of your system with the smart charging function, which enables optimal energy management.

6. Using battery-free mode with the Deye hybrid inverter

Learn how to operate your Deye hybrid inverter in battery-free mode for a simpler and more economical setup.

7. Parallelfunction of the Deye hybrid inverter

Find out how to connect multiple Deye inverters in parallel to increase your system’s capacity according to your energy needs.

8. Charging the battery with a diesel generator

An ideal solution for areas without constant access to the mains grid. Learn how to use a diesel generator to charge your batteries with the Deye hybrid inverter.

Optimise your energy consumption today!

Choose the video that interests you and discover how to make the most of the advanced features of Deye hybrid inverters for optimal energy management and long-term savings.

Warranty and Support

Warranty

5-year warranty, offering peace of mind and assurance of reliability.

The Deye SUN-12K-SG05LP3-EU hybrid inverter is a powerful and flexible solution for optimised energy management. With high efficiency, comprehensive protection and advanced control features, it is perfect for your energy storage needs and solar applications. Its intelligent design and robust features make it an excellent choice for modern energy requirements.