Products - Solar inverters

Features & Benefits

Area of application

Compact, efficient inverters with rugged IP66 housing for large roof-mounted and ground-mounted installations in demanding environments. Can be installed in a suspended or standing position.

AC connection

The inverters are certified according to VDE-AR-N 4105, 4110 and 4120 and are suitable for all types of grid. The grid connection is via screw terminals. Type 2 interchangeable AC surge protection devices are integrated at the factory. Type 1+2 combined AC surge protection devices are optionally available for the M50A and M70A.

DC-side components

The inverters have two mechanical DC disconnectors, Amphenol H4 DC connectors and Type 2 DC surge protection devices. Optionally, Type 1+2 combined DC protection devices are available. The M50A Flex 6 MPP trackers for 2 module strings each, the M70A Flex 6 MPP trackers for 3 module strings each and the M100A Flex 8 MPP trackers for 2 module strings each.

Safety features

In addition to the integrated Type 2 AC and DC surge protection devices, the inverters also offer safety functions such as arc detection and reverse polarity protection. All internal components are easily accessible through the large front door.

Built-in Bluetooth interface

Quick installation and commissioning with a smartphone and the DeltaSolar app. This also allows local monitoring of the inverter. Remote monitoring is performed via the MyDeltaSolar Cloud or a third-party monitoring system (via RS485 connection).

Applications

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	390 to 900 VDC	460 to 900 VDC	520 to 800 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