Products - Solar Inverters

Product Introduction

Features & Benefits

Versatile Installation for Demanding Environments

Robust IP66-rated housing ensures reliable operation in harsh conditions - ideal for large-scale rooftop or ground-mounted systems. Flexible mounting options (suspended or standing) make integration easy across various site layouts.

Reliable Grid Integration with Certified AC Connection

All models are certified to VDE-AR-N 4105, 4110, and 4120 standards and support all common grid types. Factory-integrated Type 2 AC surge protection simplifies installation, with optional Type 1+2 protection available for M50A and M70A models.

Efficient DC-Side Configuration for Multi-String Systems

Equipped with two mechanical DC disconnectors, Amphenol H4 connectors, and integrated Type 2 surge protection. Type 1+2 combined protection available as an option. M50A Flex: 6 MPP trackers (2 module strings each) M70A Flex: 6 MPP trackers (3 module strings each) M100A Flex: 8 MPP trackers (2 module strings each)

Advanced Protection for System Safety

Built-in safety functions such as arc fault detection and reverse polarity protection support long-term reliability. Type 2 surge protection on both AC and DC sides is included. All key components are easily accessible via the wide front door—streamlining maintenance.

Quick Commissioning with Bluetooth Connectivity

Fast setup via the DeltaSolar app and Bluetooth interface. Local and remote monitoring options available via MyDeltaSolar Cloud or third-party systems (RS485) for streamlined operations and long-term performance tracking.

Applications

Factories

Commercial Buildings

Utility-scale

Technical data

A complete overview of the technical data can be found in the data sheet.

Input (DC)	M50A Flex	M70A Flex	M100A Flex
Maximum input power (per MPP tracker/total)	58.0 kW	78.5 kW	110.0 kW
Operating voltage range	200 to 1000 VDC
MPP voltage range with maximum power 1)	390 to 900 VDC	460 to 900 VDC	520 to 840 VDC
Maximum current (per MPP tracker/total)	26 A/132 A	26 A/156 A	30 A/240 A
Maximum number of MPP trackers	6 x 2 module strings	6 x 3 module strings	8 x 2 module strings

Output (AC)	M50A Flex	M70A Flex	M100A Flex
Number of phases	3
Maximum apparent power	55 kVA	77 kVA	110 kVA
Maximum active power	55 kW	77 kW	110 kW
Rated apparent power	50 kVA	70 kVA	100 kVA
Voltage range	230/400 VAC -20%/+30%; 3 phases + PE (Δ) or 3 phases + N + PE (Y)		230/400/480 VAC -20%/+30%; 3 phases + PE (Δ) or 3 phases + N + PE (Y)
Power factor adjustment range	0.8 cap to 0.8 ind
AC surge protection devices	Type 2 (EN 61463-11), replaceable; for M50A and M70A optional combined Type 1+2 AC surge protection devices
General specifications	M50A Flex	M70A Flex	M100A Flex
Delta model name	M50A_260	M70A_260	M100A_280
Peak efficiency	98.7%	98.8%	98.7%
Operating temperature range	-25 to +60°C
Topology	Without transformer
Mechanical details	M50A Flex	M70A Flex	M100A Flex
Dimensions (H x W x D)	699 × 629 × 264 mm
Weight	64 kg	69 kg	77 kg
Cooling	Natural convection, without fans
Connection type AC side	Screw terminals
Connection type DC side	12 pairs of Amphenol H4 connectors	18 pairs of Amphenol H4 connectors	16 pairs of Amphenol H4 connectors
Communication	M50A Flex	M70A Flex	M100A Flex
Communication interfaces	Bluetooth, 2 x RS485, 1 x dry contact, 1 x external power-off, 6 x digital inputs
Safety and standards	M50A Flex	M70A Flex	M100A Flex
Degree of protection	IP66
Safety class	I
Islanding protection/grid regulation	VFR 2019 (Enedis-PRO-RES_10E, Enedis-PRO-RES_64E), VDE-AR-N 4105 / 4110 / 4120, EN 50549-1