Delta launches 50-kW rooftop solar inverter in Europe

By Mark Gorman May 4, 2021

Delta launched a new generation of its M50A Flex, a 50-kW solar inverter. Following the successful launch of M70A last year, the M50A Flex inherits its new design concept. The features include six MPP trackers, Anti-PID and AC & DC Surge Protection Devices type 1 + type 2, making the M50A Flex an ideal inverter for rooftop applications. It is available this month in selected European countries.

Flexible PV rooftop system design. With its six MPP trackers, the M50A is primarily aimed at complex rooftop installations, giving the system designer more flexibility in the arrangement of the modules and the distribution of the module strings. Additionally, the overall input voltage range is from 200 to 1000 VDC, but the inverter withstands input voltages up to 1100 VDC without damage.

Anti-PID (potential-induced degradation) function benefits the system operator in avoiding this negative effect and its resulting performance losses in the solar modules. Relevant for lightning protection on building rooftops are the newly available type 1 + type 2 AC + DC surge protection devices (SPD) which can be optionally ordered as a replacement for the pre-installed type 2 SPDs.

Other new and interesting features and functions are data point collection for string monitoring and generation of I-V curves, reactive power compensation 24/7, arc fault detection, and reverse-polarity protection. The M50A Flex comes with the standard RS485 interface and additionally provides an integrated wireless Sub-1G communication port, as well as optional Wi-Fi.

The heavily revised mechanical design results in an improved IP66 protection degree, a significant weight reduction of 15% to now 64 kg, and more space for routing the AC cable inside the inverter.

The M50A Flex at a glance