Deye SUN-20K-SG05LP3-EU-SM2 Hybrid-Wechselrichter 20 kW

The Deye SUN-20K-SG05LP3-EU-SM2 is a three-phase hybrid inverter with 20 kW rated output and the most powerful model in the proven SG05LP3-EU-SM2 series. Serving as the central hub of a modern photovoltaic system, the Deye 20K low-voltage hybrid inverter combines solar power generation, battery storage management, and emergency power supply in one compact device – ideal for large residential homes, commercial enterprises, and commercial-industrial facilities aiming for maximum self-consumption and true energy independence.

Deye SUN-20K-SG05LP3-EU-SM2 at a glance

The three-phase hybrid inverter feeds solar power into the home grid, charges excess energy into a low-voltage battery storage system (approx. 48 V), and provides emergency power when needed. Thanks to on-grid and off-grid operation as well as AC coupling, the SUN-20K-SG05LP3-EU-SM2 can be used both in new installations and for retrofitting existing PV systems. With an efficiency of up to 97.6%, it gets the most out of every kilowatt generated.

The most important advantages

• 20 kW three-phase output (3L+N+PE, 230/400 V) with 100% unbalanced output load per phase
• 2 MPP trackers and 4 strings for flexible module configuration and a DC/AC ratio up to 1.3
• High efficiency up to 97.6% (Euro efficiency 97.0%, MPPT efficiency ≥ 99%)
• Powerful battery management with up to 350 A charging and discharging current
• Compatible with lithium-ion and lead-acid batteries (low-voltage, approx. 48 V)
• AC coupling and generator charging for easy retrofitting of existing solar systems
• Parallel connection of multiple devices for larger power classes and scalability
• Robust IP65 protection rating for indoor and protected outdoor installation
• Integrated Wi-Fi and app monitoring for remote monitoring and updates

Maximum yields through high efficiency

With a maximum efficiency of 97.6% and an MPPT efficiency of over 99%, the Deye SUN-20K-SG05LP3-EU-SM2 converts generated solar power with very little loss. The two independent MPP trackers with a total of four strings allow for flexible module orientation across multiple roof surfaces – this ensures that yields remain high even with partial shading or different orientations. The supported DC/AC ratio of up to 1.3 allows for generous over-sizing with PV modules, resulting in more yield per invested euro.

Battery storage & emergency power

The Deye 20 kW hybrid inverter is designed for low-voltage battery storage systems (approx. 48 V) and supports both modern lithium-ion and classic lead-acid batteries. With a maximum charging and discharging current of 350 A, it handles even large storage capacities quickly and efficiently. Excess solar power is stored during the day and is available in the evening, at night, or during a grid failure. This way, you significantly increase your self-consumption and secure a reliable emergency power reserve.

Flexible PV design & retrofitting

Thanks to AC coupling, the SUN-20K-SG05LP3-EU-SM2 can be easily integrated into existing photovoltaic systems – ideal for retrofitting an existing system with battery storage. Additionally, the device supports charging via a generator, making it suitable for locations with unstable or no grid connection. For higher power requirements, multiple devices can be operated in parallel.

Smart monitoring & communication

Via the communication interfaces RS485, RS232, and CAN, the inverter integrates seamlessly into battery management systems and controllers. The integrated Wi-Fi enables convenient remote monitoring via app and web portal – including parameter setting, firmware updates, and remote diagnostics. This allows you to keep an eye on yields, state of charge, and system status at all times.

Comprehensive protection & safety

The Deye SUN-20K-SG05LP3-EU-SM2 is equipped with numerous protective functions: anti-islanding, residual current and ground fault detection, surge and short-circuit protection, DC disconnect switch, as well as monitoring of insulation resistance and DC component. In combination with the IP65 protection rating and a wide operating temperature range from -40 °C to +60 °C, the device works reliably and safely even under demanding conditions.

Areas of application

• Large residential homes with high power demand and storage
• Commercial and light industrial facilities
• Retrofitting existing PV systems with battery storage (AC coupling)
• Locations with emergency power requirements or weak grid connections

Technical specifications

Frequently asked questions about the Deye SUN-20K-SG05LP3-EU-SM2

Is the Deye 20K suitable for a three-phase system?
Yes. The SUN-20K-SG05LP3-EU-SM2 is a three-phase hybrid inverter (230/400 V) and supports a 100% unbalanced output load per phase.

Which batteries are compatible?
The inverter works with low-voltage battery storage systems (approx. 48 V) and supports both lithium-ion and lead-acid batteries with up to 350 A charge/discharge current.

Can I use it to retrofit an existing PV system?
Yes. Thanks to AC coupling, the Deye SUN-20K-SG05LP3-EU-SM2 can be integrated into existing solar systems for battery retrofitting.

Note: Installation and commissioning must be carried out exclusively by qualified personnel in compliance with applicable standards and regulations. Technical specifications may vary depending on firmware and product revision – please refer to the official data sheet from Deye.