Delta Electronics undefined M42U-122

Delta Electronics • M42U-121/122

M42U-122

Region:Taiwan
Region shows where the seller or factory is located. Most ship globally, and all listed suppliers should be able to ship to your current location.
42kW
Nominal AC Power
98.6%
Max Efficiency
74 x 840
Dimensions (mm)
Size Your System Find Installer

Ideal Use Case

The Delta Electronics M42U-122 is tailored for specific solar energy needs. This inverter is an excellent choice if you:

Manage a large 42.0 kW commercial or industrial solar array
Use three-phase grid connection
Need 2 independent MPPT trackers for different roof orientations
Want maximum energy harvest (98.6% peak efficiency)
Focus on grid-tied operation without battery storage
Operate in extremely cold climates

Don’t guess your solar setup — calculate it first!

Take our Solar Quiz to get a personalized recommendation for panels, inverter, battery capacity, and system size — before you spend money on the wrong setup.

Run Technical Sizing

AC Output Data

Nominal AC Power42 kW
Max Efficiency98.6 %
Euro Efficiency98.4 %
Max AC Current56.2 A
Rated AC Current0 A
Number of Feed-in Phases3
THD (Total Harmonic Distortion)3 %

DC Input Data

MPP Voltage Range540~830 V
Max DC Voltage1000 V
Rated DC Voltage710 V
Min DC Voltage to Start250 V
Max DC Current0 A
Number of MPP Trackers2
DC Inputs0
ConnectorsMC4

Mechanical & Environmental Data

Dimensions (W x H x D)74 x 840 x 614 mm
Weight0.0 kg
Protection ClassNEMA 4X
Cooling MethodFan

Operating Conditions

Operating Temperature-25 ~ +60 ℃
Frequency50, 60 Hz
Max Altitude3000 m
Power Consumption (Night)3 W

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Product FAQ

What size solar array can the Delta Electronics M42U-122 handle?

The Delta Electronics M42U-122 has a nominal AC output of 42kW with a maximum efficiency of 98.6%. It is typically paired with a solar array of 50–55kW DC for optimal energy harvest.

Does the Delta Electronics M42U-122 have WiFi monitoring?

Most Delta Electronics inverters come with or support optional WiFi/Ethernet dongles. This allows you to track your solar production and battery status via a mobile app or web portal in real-time.

How many MPPT trackers does the Delta Electronics M42U-122 have?

This inverter features 2 independent MPPT trackers with a maximum DC input voltage of 1000V. Multiple trackers allow panels on different roof faces or orientations to operate independently for maximum yield.

Is the Delta Electronics M42U-122 a three-phase inverter?

Yes, this is a three-phase inverter. Three-phase inverters are ideal for larger homes, commercial systems, or regions with three-phase grid connections.