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In the same series:Large-Capacity Solar Power Inverters (3 kW – 136 kW)On-Grid Inverters

DEYE SUN-40K-G04 Three Phase String Inverter

Deye 40 kW Three-Phase String Solar Inverter SUN-40K-G04

A 40 kW three-phase on-grid string inverter for commercial rooftops: three MPP trackers, nine strings and 52 kW of accepted PV, rated 60.6 A per phase at 220/380 V.

Authorised Deye distributor for the Middle East — certificate No. GFKFLFI1.

Deye SUN-40K-G04, 40 kW, is also searched as deye inverter.

  • Rated AC Output Active Power: 40000 W
  • Max. Efficiency: 98.7 %
  • Number of MPPTs: 3
  • Grid Connection Form: 3L+N+PE
AED 5,689incl. VAT

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Online datasheetDownload datasheet (PDF)

Deye 40 kW Three-Phase String Solar Inverter SUN-40K-G04 features

40000 W rated active power: 60.6 A per phase at 220/380 V, 58 A at 230/400 V, up to 44 kVA apparent

52 kW maximum PV input over 3 MPP trackers and 9 strings (3+3+3), 40 A operating current per tracker

98.7% peak efficiency, 98.1% European efficiency and MPPT efficiency above 99%

200-1000 V MPPT window, 600 V rated PV input, 1100 V maximum PV voltage and 250 V startup

IP65 cabinet, 434 x 570 x 243 mm, 39 kg, intelligent air cooling under 65 dB, -25 to 60 °C, 4000 m

Zero export, DC switch, anti-islanding and residual current detection; RS485, RS232, Wi-Fi and LAN

About the Deye 40 kW Three-Phase String Solar Inverter SUN-40K-G04

The Deye SUN-40K-G04 is a 40 kW three-phase on-grid string inverter built for commercial rooftops and ground-mount projects. It accepts up to 52 kW of PV across three MPP trackers and nine strings, delivers 40000 W of active power at 98.7% peak efficiency, and connects to a 3L+N+PE grid. Each tracker carries 40 A of operating current over three strings, tracks between 200 V and 1000 V, tolerates 1100 V maximum PV input and starts at 250 V. Output is 60.6 A per phase at 220/380 V or 58 A at 230/400 V, peaking at 66.7 A and 44 kVA apparent power, with THDi below 3% and power factor adjustable from 0.8 leading to 0.8 lagging. European efficiency is 98.1% and MPPT efficiency stays above 99%. The IP65 cabinet measures 434 x 570 x 243 mm, weighs 39 kg and cools by intelligent air flow under 65 dB from -25 to 60 °C, derating from 45 °C and rated to 4000 m. The stated warranty term is 5 years. We supply the SUN-40K-G04 as an authorised Deye distributor.

Specifications last updated 24 January 2026

Deye 40 kW Three-Phase String Solar Inverter SUN-40K-G04 full specifications

Electrical

AC Output Overcurrent ProtectionYes
AC Output Overvoltage ProtectionYes
AC Output Short-Circuit ProtectionYes
AC Voltage Tolerance (×Un)0.85-1.1
Anti-Islanding ProtectionYes
Anti-PID FunctionOptional
Arc Fault Circuit Interrupter (AFCI)Optional
DC Component MonitoringYes
DC Injection Current (% of In)<0.5
DC Reverse Polarity ProtectionYes
European Efficiency98.1 %
Grid Connection Form3L+N+PE
Insulation Impedance DetectionYes
Inverter TopologyNon-Isolated
Max. AC Output Apparent Power44000 VA
Max. AC Output Current66.7/63.8 A
Max. Efficiency98.7 %
Max. Input Short-Circuit Current60+60+60 A
Max. Operating PV Input Current40+40+40 A
Max. PV Input Power52000 W
Max. PV Input Voltage1100 V
Number of MPPTs3
MPPT Efficiency>99 %
MPPT Voltage Range200-1000 V
Overvoltage CategoryOVC II(DC), OVC III(AC)
Power Factor Range (Leading to Lagging)0.8-0.8
Rated AC Output Active Power40000 W
Rated AC Output Current60.6/58 A
Rated Grid Frequency50/45-55, 60/55-65 Hz
Rated Output Voltage220/380, 230/400 V
Rated PV Input Voltage600 V
Residual Current DetectionYes
Startup Voltage250 V
Strings per MPPT3+3+3
Surge Protection LevelTYPE II(DC), TYPE II(AC)
Current Total Harmonic Distortion (THDi)<3 %
Virtual Synchronous Generator (VSG) SupportYes
Warranty (Years)5
Zero Export SupportYes

Mechanical

Cabinet Dimensions434 x 570 x 243 mm
Communication InterfacesRS485, RS232, Wi-Fi, LAN
DC SwitchYes
LCD/LED DisplayLCD1602
String MonitoringOptional
Weight39 kg

Environmental

Derating Start Temperature45 °C
IP RatingIP65
Noise Level<65 dB
Operating Temperature Range-25 to 60 °C
Max. Operating Altitude4000 m
Permissible Ambient Humidity0-100 %
Thermal ProtectionYes
Cooling TypeIntelligent Air Cooling

Certifications

  • IEC 61727
  • IEC 62116
  • CEI 0-21
  • EN 50549-1
  • NRS 097
  • G98
  • G99
  • VDE-AR-N 4105
  • NC RFG
  • IEC 61000-6-1
  • EN 61000-6-1
  • IEC 61000-6-2
  • EN 61000-6-2
  • IEC 61000-6-3
  • EN 61000-6-3
  • IEC 61000-6-4
  • EN 61000-6-4
  • IEC 62109-1
  • EN 62109-1
  • IEC 62109-2
  • EN 62109-2

Troubleshooting & error codes

Looking up an error code on this Deye SUN G04/G05/G06 3-Phase? Browse the full list of codes for this device, with the cause and recommended fix for each.

View error codes for this device →

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