Maximum Profitability

The H4A Flex solar inverter features a 4.0 kVA power output. This new single phase solar inverter is designed for residential PV applications where maximum versatility and profitability are important. Thanks to the high maximum efficiency up to 97.5%, optimum yield from the PV plant is ensured from the device.

Flexible System Design

For the system planner, maximum flexibility is ensured thanks to a wide input voltage range of 30 to 600 V. The new unit is compatible with major types of PV Modules and the robust IP65 rated enclosure allows outdoor installation.

Integrated Wi-Fi communication

Built-in Wi-Fi communication allows the user to commission and view the status of the inverter via the MyDeltaSolar app on a mobile device. The app is available for iOS and Android.

Simple installation

The lightweight and compact design of the H3A Flex greatly simplifies installation. The scope of delivery includes a wall bracket as well as an AC plug and DC plugs.

Technical Data

Input (DC)
Max. recommended PV power 3.6 kWp 
Nominal power 3.19 kW 
Voltage range 30 ... 600 V 
Full power MPP range 180 ... 500 V 
Max. current 11 A each MPP / 18 A total
Max. number of MPP trackers
Input load ≤ 3.19 kW per MPP tracker, symmetrical and 
Output (AC)
Nominal apparent power 3 kVA 1) 2)
Voltage range 230 -20%/+22%, 1 Phase (L, N, PE) 3)
Nominal current 14.3 A 
Nominal frequency 50 / 60 Hz 
Frequency range 50 / 60 Hz ±5 Hz 3) 
Power factor adjustable 0.8 cap ... 0.8 ind 
Total harmonic distortion (THD) <3 % @ nominal apparent power 
General Specification
Model name H3A_220 
Part number Delta RPI302H220000 
Max. efficiency 97.5 % 
Efficiency EU 96.8 % 
Operating temperature -25 ... +60 ºC
Full power without derating -25 ... +40 ºC
Storage temperature -25 ... +60 ºC
Humidity 0 ... 95 % non-condensing 
Max. operating altitude 2000 m (above sea level) 
Dimensions / connections
Size (H x W x D) 318 x 380 x 130 mm 
Weight 10 kg 
Cooling Natural convection 
AC connector Wieland RST 25I3S (96.031.4154.3) 
DC connector 2 pair Multi-Contact MC4 
Communication interfaces Wi-Fi 
DC disconnector Integrated 
Display Data visualization via mobile device app
Safety / Standards
Protection degree IP65 
Safety class
Configurable trip parameters Yes 
Insulation monitoring Yes 
Overload behavior Current limitation; power limitation 
Anti-islanding protection / Grid regulation VDE 0126-1-1; VDE-AR-N-4105; EN 50438 2013:Netherlands 
EMC EN61000-6-2; EN61000-6-3 
Safety IEC62109-1 / -2; CE compliance 


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