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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-40K-US-F-LSW-SPRT, (inverter with Fan andinternal Sunspec transmitter)    

Solis-(25-40)K three phase series string inverters utilize a 4 MPPT design to give PV system designers and installers more flexibility to optimize their PV string-sizing configuration for increased energy production and a reduced environmental impact. These NEMA 4X inverters come standard with a separable wiring box which results in increased installation safety and fast, efficient maintenance operations.

25-40kW Three Phase Inverter

Leading Features

  • 7” LCD color display

  • Wide voltage range and low startup voltage
  • 10 Year Standard Warranty with extension options
  • Transformer-less three phase design with 480Vac output
  • RS-485 Modbus communication protocol with Wi-Fi interface
  • Web-based data monitoring with downloadable Solis Mobile App
  • Max. efficiency 98.6% (CEC efficiency 98.3%) with ultra-low start-up voltage
  • Designed for all commercial, industrial and utility scale applications
  • Industry-leading 4 MPPT designs with fast (<5 sec) MPPT response times
  • AFCI protection, proactively reduces fire risk
  • Compact and lightweight design inside a corrosion-resistant NEMA 4X enclosure

Technical Specifications

DC Values

  • Max. input voltage
    1000 V
  • Rated voltage
    700 V
  • Start-up voltage
    350 V
  • MPPT voltage range
    200 - 800 V
  • Max. input current
    4*18 A
  • Max. short circuit current
    4*28.1 A
  • MPPT number
  • Max. input strings number

AC Values

  • Max. apparent output power
    25 kVA
  • Max. output power
    25 kW
  • Rated grid voltage
    3Ф/PE, 480 V
  • Rated grid frequency
    60 Hz
  • Max. output current
    30.1 A
  • Power factor
    >0.99 (0.8 leading - 0.8 lagging)
  • THDi


  • CEC efficiency


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

General Data

  • Weight (Inverter/Wiring box)
    SW: 127 lbs (57.7 kgs) / 22.8 lbs (10.3 kgs), LSW: 127 lbs (57.7 kgs)/26.5 lbs (12kgs)
  • Topology
  • Self consumption (night)
  • Relative humidity
  • 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
    TYPE 4X
  • Cooling concept
    Natural convection
  • Max. operation altitude
    13120ft (4000m)
  • Compliance
    UL 1741, IEEE 1547, UL 1699B, UL 1998, FCC, UL 1741SA, California Rule 21, SRD-UL1741


  • AC connection
    4 knockout for 1.5" conduit at bottom and side, terminal block, OT terminal (Copper or aluminum 8-2AWG), Aluminum requires bi-metallic compatible terminal
  • Display
    7.0"LCD color screen display
  • Communication
    Modbus RTU (Sunspec compliant), RS485, Optional: Cellular, Wi-Fi
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