M42U / M36U

Delta’s grid-tied, three-phase, transformerless inverters range from 36kW to the industry’s first 80kW inverter, offering unequalled design flexibility for your Commercial. Industrial and Utility-Scale installations. Delta’s M36U and M42U inverters help you optimize every site.

With 98.6% peak efficiency, a rugged enclosure, and proven reliability, the M36U and M42U are ideal on their own or paired with Delta’s large-scale solar PV building blocks: the M80U and M60U.
Optimal architecture
  • Integrates seamlessly with all RPI three-phase inverters up to 80kW, enabling each site to be maximized
  • Connects 6 to 10 strings with fused inputs
Highest returns
  • 98.6% peak efficiency, 98.0% CEC efficiency
  • Dual MPPT and 200-1000Vdc wide input range
  • Rugged NEMA 4X construction
Innovative technology
  • Flexible
    • Variety of mounting options: wall mounted, under array or on racking, inside or outdoors
    • Three wiring box configurations: MC4, Fuse and Terminal
    • Ergonomic handles and eye bolts for lifting
  • Smart
    • Integrated smart grid functionality
    • Built-in AC Disconnect on MC4 and Fuse configurations
    • Built-in DC disconnect
    • Separate DC disconnects for each MPP on MC4 and Fuse configurations
  • Easy
  • Integrated MODBUS and optional Ethernet
  • Compatible with Delta or third-party monitoring and control
  • Built-in Type 2 AC and DC surge protection devices
  • Built-in arc fault detector
  • Replaceable surge protection devices, fan trays, and inverter components
  • Commercial: Part of a full range of rugged NEMA 4X inverters from 36kW to 80kW, the Delta grid-tied three-phase RPI series inverters can maximize the solar potential of your commercial site
  • Industrial: Flexible mounting options work for rooftop, wall mount, or ground-mount applications with industry’s highest power density
  • Utility-Scale: The industry’s largest string inverter building block provides the advantages of string topology at a Utility-Scale
  • Residential: For larger homes with three-phase power, Delta’s RPI series offers reliability and flexibility
  • All regions: Built in rapid shutdown and smart grid technology is designed to meet new grid rules and requirements
  • Connected systems: State-of-the art communications enable systems to be monitored and managed with Delta or third-party systems
Title Type Size Download
Data sheet PDF 7467.31 KB Download
M36U Leaflet PDF 2083.55 KB Download
M42U Leaflet PDF 1930.54 KB Download
Manual PDF 15203.09 KB Download