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Deye SUN-40K-G04

The Deye SUN-40K-G04 is a three-phase grid-tied string inverter for commercial rooftops, factories and ground-mount PV projects. It is built around high DC voltage, multiple MPPT channels and grid-support functions, making it easier to design PV arrays across different roof faces or string lengths.

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Project value points:
3 MPPT design improves yield where module strings face different orientations or shading conditions.
Wide input-voltage operation supports flexible string sizing and stable production through seasonal temperature changes.
Zero-export, VSG and optional string monitoring features help meet utility requirements and reduce O&M time.
IP65 protection and integrated surge protection make it suitable for demanding outdoor environments.

The 40kW capacity is well suited to distributed PV projects that need strong efficiency, clean grid compliance and straightforward serviceability.

Technical Specifications Feedback

Parameter Category	Parameter Item	Specification Value
AC Output Parameters	Rated AC Output Active Power	40 kW
AC Output Parameters	Maximum AC Apparent Power	44 kVA
PV Input Parameters	Maximum PV Input Power	52 kW
	Maximum PV Input Voltage	1,100 V
	Start-up Voltage	250 V
	MPPT Voltage Range	200–1,000 V
	Rated PV Input Voltage	600 V
MPPT & String Parameters	Number of MPPT Channels	3
	String Configuration	3/3+3+3
	Maximum Operating DC Current	40+40+40 A
	Short-circuit Current	60+60+60 A
Grid Connection Parameters	Rated Grid Voltage	220/380 V or 230/400 V
	Grid Connection Type	3L/N/PE
	Rated Grid Frequency	50/60 Hz
	Total Harmonic Distortion of Current (THDi)	<3%
Efficiency & Protection Parameters	Maximum Conversion Efficiency	98.70%
	European Standard Efficiency (Euro Efficiency)	98.10%
	MPPT Tracking Efficiency	>99%
	Ingress Protection Rating	IP65
	Surge Protection Device (SPD)	Type II DC/AC SPD
	Cooling Method	Intelligent Air Cooling
	Net Weight	39 kg