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50-66kW Three Phase Inverter

50-66kW Three Phase Inverter

Reliability      Safety      Capacity


-LSW-SPRT = Sunspec Transmitter
-LSW-RSS = Tigo transmitter
-SW = No Transmitter

Ordering guidelines: Determine the basic model and add your desired features as described from bove.
Ex: Solis-50K-US-F-LSW-SPRT, (inverter with Fan andinternal Sunspec transmitter)

(50-66)kW three phase series string inverter are suitable for commercial and light industrial PV plants. These units have a compact and light design making them a two-person easy installation. The ultra-low THDi of ˂2% and filter features add multiple layers of protection for the grid and can have up to 6MW in parallel. For easy installation and O&M, these units have a separable wiring box allowing the EPC to install the wiring box ahead of time and add the inverter at a later time. To finish it off these units have multiple options of communication and protocols with free APP and PC monitoring.

50-66kW Three Phase Inverter

Leading Features


  • Wide voltage range and low startup voltage
  • 10 years standard warranty with extension options
  • Transformer-less three phase design with 480Vac output
  • Web-based data monitoring with downloadable Solis Mobile App
  • Max. efficiency 98.8% (CEC efficiency 98.4%) with ultra-low start up voltage
  • Compact and lightweight design inside a corrosion-resistant NEMA 4X enclosure
  • Designed for all commercial, industrial, and utility-scale applications
  • Industry-leading 4 MPPT designs with fast (<5 sec.) MPPT response times
  • RS-485 Modbus communication protocol with Wi-Fi interface

Technical Specifications

Input DC

  • Recommended max. PV power:
  • Max. input voltage: 1000V
  • Rated voltage: 700V
  • Start-up Voltage: 200V
  • MPPT voltage range:
  • Max. input current:
  • Max. short circuit current:
  • MPPT number: 4
  • Max. input strings: 16


  • DC reverse-polarity protection:
  • Ground fault monitoring: Yes
  • Anti-islanding protection: Yes
  • Integrated AFCI (DC arc-fault circuit protection):
  • Integrated DC switch: Yes
  • Rapid shutdown: Yes

Output AC

  • Rated output power:
  • Max. apparent output power:
  • Max. output power:
  • Rated grid voltage:
    3Ф/PE, 480V
  • Rated grid frequency:
  • Max. output current: 60.2A
  • Power Factor:
    >0.99 (0.8 leading – 0.8 lagging)
  • THDi: <3%


  • DC connection:
    4 knockout for 2″ conduit at bottom and side, Fuse screw terminal (Copper 12-6AWG)
  • AC connection:
    4 knockout for 2″ conduit at bottom and side, OT terminal (Copper or aluminium 8-2AWG)Aluminum requires a bi-metallic compatible terminal
  • Display: LCD
  • Communication:
    Modbus RTU (Sunspec compliant), RS485, Optional: Cellular, Wi-Fi

General Data

  • Dimensions (W*H*D):
    SW: 24.9*40.4*14.7 in (633*1027*374 mm), LSW: 24.9*47.5*14.7 in (633*1206*374 mm)
  • Weight (inverter/wiring box):
    SW: 147 lbs (66.7 kgs)/35.4 lbs (16 kgs), LSW: 147 lbs (66.7 kgs)/43.4 lbs (19.7 kgs)
  • Topology: Transformerless
  • Self consumption: <1W (night )
  • Relative humidity: 0-100%
  • Operating ambient temperature range:
    -13 °F to 140 °F (-25°C to 60°C)
  • Storage environment:
    -13 °F to 176 °F (-25°C to 80°C)
  • Ingress protection: NEMA 4X
  • Cooling concept:
    Intelligent redundant fan-cooling
  • Max. operation altitude:
    13,120 ft (4000 m)


  • Max. efficiency: 98.8%
  • CEC efficiency: 98.4%