Overview

Maximum profitability and versatility

The M50A Inverter has a peak efficiency of 98.6 % and has built-in and replaceable AC and DC-side Type II SPDs (surge protection devices) and 15 A string fuses. 2 MPP trackers are featured with symmetrical and asymmetrical loading possible (40/60 %) as well as a wide input voltage range from 200 – 1100 V.

Extraordinary power density and durability

The M50A offers an exceptional power density-to-size ratio, one of the highest in the 50 kVA transformerless inverter class. The aluminium housing ensures long lasting protection against moisture and corrosion and is suitable for indoor and outdoor applications (IP65).

Simple Installation

The lightweight and compact design of the RPI M50A greatly simplifies installation. The inverters include a unique wall mount bracket in the scope of delivery, allowing the units to be easily installed on a variety of wall surfaces.

Technical Data

Input (DC)
RPI M50A
Max. recommended PV power 70 kWP 1)
Nominal power 52 kW 2)
Voltage range 200 ... 1100 V 3)
Full power MPP range 520 ... 800 V 1)
Max. current 100 A (50 A per MPP tracker)
Max. number of MPP trackers Parallel inputs: 1 MPP tracker Separate inputs: 2 MPP trackers
Input load Symmetrical and asymmetrical (40/60 %)
Output (AC)
RPI M50A
Nominal apparent power 50 kVA 4)
Voltage range 3 x 230 / 400 V (± 20%) 5) 3 / PE or 3 / N / PE
Nominal current (per phase) 73 A 
Nominal frequency 50 / 60 Hz
Frequency range 50 / 60 Hz ± 5 Hz 5)
Power factor adjustable 0.8 cap ... 0.8 ind
Total harmonic distortion (THD) < 3 % @ nominal apparent power
General Specification
RPI M50A
Model name RPI M50A
Part number Delta RPI M50A_12s Model:  RPI503M221000
RPI M50A_122 Model:  RPI503FA0E0200
Max. efficiency 98.6%
Efficiency EU 98.4%
Operating temperature -25 ... +60 °C
Full power without derating -25 ... +48 °C
Storage temperature -30 ... +60 °C
Humidity 0 ... 100% non-condensing 
Max. operating altitude 2000 m (above sea Level)
Dimensions / connections
RPI M50A
Size (H x W x D) 740 × 612 × 278 mm
Weight 74 kg
Cooling Fans
AC connector China Aviation Optical-Electrical Technology Co. PVE5T125KE36
DC connector M50A_12s; 12 pairs of Multi-Contact MC4
M50A_122; 10 pairs of Multi-Contact MC4
Communication interfaces 2 x RJ45 / RS485, 6 digital inputs
DC disconnector Integrated
Display 2 LEDs, 4-line LCD
Safety / Standards
RPI M50A
Protection degree IP65
Safety class I
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; BDEW
EMC EN61000-6-2; EN61000-6-3; EN61000-3-11; EN61000-3-12
Safety IEC62109-1 / -2; CE compliance

1) When operated with balanced DC inputs (50/50 %)

2) Max. 34.8 kW per DC input with asymmetrical load

3) For some firmware versions limited to 1000 V

4) Cos Phi = 1 (VA = W)

5) AC voltage and frequency range will be programmed according to the individual country requirements

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