Deye

Deye SUN-40/45/50K-G04

40kW three phase string inverter with 98.7% efficiency and 1100V max PV voltage.

Models Covered: DEYE-SUN-40K-G04, DEYE-SUN-45K-G04, DEYE-SUN-50K-G04

Manufacturer: Ningbo Deye Inverter Technology Co., Ltd

Application: The Deye SUN-40K-G04 is a 40 kW three-phase on-grid string inverter whose three MPP trackers, nine strings and 52 kW of accepted PV input make it a commercial-rooftop machine rather than a domestic one. Rated AC output is 40000 W, or 60.6 A per phase into 220/380 V, rising to 66.7 A and 44 kVA of apparent power. Each tracker handles 40 A of operating current across three strings, tracks from 200 V to 1000 V and tolerates 1100 V open-circuit. Peak efficiency is 98.7%, European efficiency 98.1%, and MPPT efficiency stays above 99%. An LCD1602 display reads out on site while RS485, RS232, Wi-Fi and LAN handle remote data. The IP65 enclosure measures 434 x 570 x 243 mm, weighs 39 kg, cools by intelligent air flow under 65 dB and is rated to 4000 m. The SUN-40K-G04 carries a stated 5-year warranty.

Technical Specifications

Technical Specifications
Parameter DEYE-SUN-40K-G04DEYE-SUN-45K-G04DEYE-SUN-50K-G04
Electrical Data
AC Output Overcurrent Protection Yes
AC Output Overvoltage Protection Yes
AC Output Short-Circuit Protection Yes
AC Voltage Tolerance (×Un) 0.85-1.1
Anti-Islanding Protection Yes
Anti-PID Function Optional
Arc Fault Circuit Interrupter (AFCI) Optional
DC Component Monitoring Yes
DC Injection Current (% of In) <0.5
DC Reverse Polarity Protection Yes
European Efficiency 98.1%
Grid Connection Form 3L+N+PE
Insulation Impedance Detection Yes
Inverter Topology Non-Isolated
Max. AC Output Apparent Power 44000 VA49500 VA55000 VA
Max. AC Output Current 66.7/63.8 A75/71.7 A83.3/79.7 A
Max. Efficiency 98.7%
Max. Input Short-Circuit Current 60+60+60 A60+60+60 A60+60+60+60 A
Max. Operating PV Input Current 40+40+40 A40+40+40 A40+40+40+40 A
Max. PV Input Power 52000 W58500 W65000 W
Max. PV Input Voltage 1100 V
Number of MPPTs 334
MPPT Efficiency >99%
MPPT Voltage Range 200-1000 V
Overvoltage Category OVC II(DC), OVC III(AC)
Power Factor Range (Leading to Lagging) 0.8-0.8
Rated AC Output Active Power 40000 W45000 W50000 W
Rated AC Output Current 60.6/58 A68.2/65.2 A75.8/72.5 A
Rated Grid Frequency 50/45-55, 60/55-65 Hz
Rated Output Voltage 220/380, 230/400 V
Rated PV Input Voltage 600 V
Residual Current Detection Yes
Startup Voltage 250 V
Strings per MPPT 3+3+33+3+33+3+3+3
Surge Protection Level TYPE II(DC), TYPE II(AC)
Current Total Harmonic Distortion (THDi) <3%
Virtual Synchronous Generator (VSG) Support Yes
Warranty (Years) 5
Zero Export Support Yes
Mechanical & Interface
Cabinet Dimensions 434 x 570 x 243 mm
Communication Interfaces RS485, RS232, Wi-Fi, LAN
DC Switch Yes
LCD/LED Display LCD1602
String Monitoring Optional
Weight 39 kg
Environment & Protection
Derating Start Temperature 45 °C
IP Rating IP65
Noise Level <65 dB
Operating Temperature Range -25 to 60 °C
Max. Operating Altitude 4000 m
Permissible Ambient Humidity 0-100%
Thermal Protection Yes
Cooling Type Intelligent Air Cooling

Figures are measured at the test conditions the manufacturer’s datasheet states. A dash means the manufacturer publishes no figure for that model.

Availability & grid compliance in France

Market France
Grid authority / regulator CRE France
Quotation currency EUR
Support hours timezone Europe/Paris
Delivery & installation coverage Paris, Marseille, Lyon, Toulouse

Figures on this page are the manufacturer's own, measured at the test conditions the datasheet states — they do not change by country. What changes is the approval that has to be met before the unit is energised: in France that is CRE France. Confirm the grid code, import requirements and any local certification with them, or with us, before you order.

Key Features & Technical Highlights

  • 98.7% Efficiency: Maximum energy conversion
  • 1100V PV Input: High voltage solar strings
  • Anti-PID: Prevents panel degradation
  • VSG Support: Virtual Synchronous Generator
  • String Monitoring: Optional intelligent monitoring
  • Intelligent Cooling: Advanced thermal management

Frequently Asked Questions

Is the DEYE SUN-40K-G04 suitable for the Middle East climate?

Yes. The SUN-40K-G04 is rated -25 to 60 °C, with derating above 45 °C, which covers the heat and dust of the Gulf, North Africa and the wider MEA region. Mount it in shade for the best summer output. Its IP 65 rating handles dust and humidity.

What is the maximum PV input power?

The SUN-40K-G04 series supports up to 52kW of PV input power, allowing for high DC/AC ratios and maximum energy harvest.

Does it support Anti-PID function?

Yes! The optional Anti-PID function helps prevent long-term performance degradation of solar panels, ensuring high efficiency over the system's lifespan.

Is the DEYE SUN-45K-G04 suitable for the Middle East climate?

Yes. The SUN-45K-G04 is rated -25 to 60 °C, with derating above 45 °C, which covers the heat and dust of the Gulf, North Africa and the wider MEA region. Mount it in shade for the best summer output. Its IP 65 rating handles dust and humidity.

Is the DEYE SUN-50K-G04 suitable for the Middle East climate?

Yes. The SUN-50K-G04 is rated -25 to 60 °C, with derating above 45 °C, which covers the heat and dust of the Gulf, North Africa and the wider MEA region. Mount it in shade for the best summer output. Its IP 65 rating handles dust and humidity.