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Delta Introduces New M15A/M20A Flex Inverters for Use in PV plants on Residential and Small Commercial Buildings

Optimised fan-less design delivers whisper-quiet operation

Delta, a global leader in power and thermal management solutions, presents the new multi-MPPT inverters M15A Flex and M20A Flex with outputs of 16.5kVA and 22 kVA respectively. The new inverters are an extension to the Flex series, with their design concept inherited from the M70A Flex. M15A Flex and M20A Flex address the needs of the rapidly growing market for small rooftop installations: compact, lightweight, quiet in operation (maximum 31.6 db(A)) and easy to install. With these qualities, the inverters are the perfect solution for installations in both residential and office buildings. In addition, outdoor installations are also possible thanks to their IP66 protection and an operating temperature range of -25 to +50 ºC.

“Delta’s M15A and M20A Flex have a fan-less design and are cooled exclusively by natural convection. This makes them quiet and ideal for residential and small commercial buildings where low noise is a requirement,” says Patrick Schahl, Product Manager of PVI Business Unit, Delta Electronics EMEA Region. “Aside from the technical features, customers value the importance of plant-relevant operating data, to understand their own carbon footprint, for example. Delta has extended the MyDeltaSolar app functionality and integrated a Wi-Fi module into the inverters that enables a direct connection to a smartphone or a WLAN router.”

Increased profitability through outstanding reliability

Two MPP trackers and an input voltage range of 200 to 1000 VDC ensure optimum energy yield. The three-phase inverters operate reliably and efficiently even at temperatures up to +50 ºC. To further increase reliability and prevent operational failures due to adverse installation conditions, the inverters are equipped with several key features: maximum voltage withstand up to 1100 VDC, arc fault detection and reverse polarity protection. The built-in anti-PID function prevents voltage-induced power degradation in crystalline solar cells, thereby extending their service life. In addition, replaceable AC and DC type 2 surge protection devices (SPD) are integrated; thus, string fuses are not required.

Simpler installation thanks to improved design

Installers benefit from the revised design and the low weight of about 40 kg. The mounting plate and AC and DC connectors are included.

The M15A und M20A Flex at a glance
• Whisper quiet (max. 31.6 dB(A)) thanks to natural convection
• 2 MPP trackers for more flexibility in PV system design.
• Input voltage range 200 to 1000 VDC with maximum voltage withstand up to 1100 VDC
• Lightweight IP66 housing
• Replaceable AC and DC type 2 surge protection devices
• Data point collection for string monitoring and I-V curve generation
• Arc fault detection and reverse polarity protection
• Anti-PID technology
• Reactive power compensation 24/7

The M15A and M20A Flex inverters will be available from Delta from September 2021 in selected European countries and can be ordered under part numbers M15A_220 and M20A_220.

About Delta

Delta, founded in 1971, is a global leader in switching power supplies and thermal management products with a thriving portfolio of smart energy-saving systems and solutions in the fields of industrial automation, building automation, telecom power, data centre infrastructure, EV charging, renewable energy, energy storage and display, to nurture the development of smart manufacturing and sustainable cities. As a world-class corporate citizen guided by its mission statement, “To provide innovative, clean and energy-efficient solutions for a better tomorrow,” Delta leverages its core competence in high-efficiency power electronics and its ESG-embedded business model to address key environmental issues, such as climate change. Delta serves customers through its sales offices, R&D centres and manufacturing facilities spread over close to 200 locations across 5 continents.

Throughout its history, Delta has received various global awards and recognition for its business achievements, innovative technologies and dedication to ESG. Since 2011, Delta has been listed on the DJSI World Index of Dow Jones Sustainability™ Indices for 10 consecutive years. In 2020, Delta was also recognized by CDP with two “A” leadership level ratings for its substantial contribution to climate change and water security issues and named Supplier Engagement Leader for its continuous development of a sustainable value chain
For detailed information about Delta, please visit: www.delta-emea.com