The GoodWe SDT G2 Series inverters are designed for three-phase residential and small commercial projects. The series includes three models: the GW17KT-DT, GW20KT-DT, and GW25KT-DT. These inverters are compact and lightweight, being 45% smaller than the previous generation. They are also easy to install and feature a smart fan cooling system for efficient heat dissipation.

Here's a breakdown of their key features:

• High Efficiency: These inverters boast a maximum efficiency of 98.4% and a European efficiency of 97.7%. This high efficiency ensures that the maximum amount of DC power generated by the solar panels is converted into usable AC power.
• Compatibility: The inverters are compatible with bifacial modules, which can absorb sunlight from both sides, increasing energy yield.
• Oversizing Capabilities: The SDT G2 series allows for 150% DC input oversizing and 110% AC output overloading, providing flexibility in system design and maximizing power output.
• Advanced Protection: These inverters come equipped with an array of protection features, including: PV insulation resistance detection, residual current monitoring, PV reverse polarity protection, anti-islanding protection, AC overcurrent and short circuit protection, AC overvoltage protection, DC switch, DC surge protection (Type III, with Type II optional), and AC surge protection (Type III). Additionally, they offer optional AFCI (Arc Fault Circuit Interrupter) for enhanced safety.
• User-Friendly Interface: Users can monitor and control the inverters through an integrated LCD screen, LED indicators (optional), or remotely using the WLAN and mobile app.
• Flexible Communication: The inverters offer various communication options, including WiFi, RS485, or LAN (optional), and support Modbus-RTU communication protocol, which is SunSpec compliant.
• Wide Operating Range: With an operating temperature range of -30°C to +60°C, these inverters are suitable for diverse climates. They have a maximum operating altitude of 4000 meters, except in Australia, where the limit is 3000 meters.
• Durable Design: The inverters feature an ingress protection rating of IP65, indicating they are dust-tight and protected against water jets, making them suitable for outdoor installation.

The sources highlight that these inverters are designed to deliver clean power with a near-unity power factor (~1) and a Total Harmonic Distortion (THD) of less than 3%. While the specific waveform type (e.g., pure sine wave or modified sine wave) isn't explicitly stated, the low THD suggests a waveform that closely resembles a sine wave, which is crucial for grid-tied systems.

Specifications of the GoodWe SDT G2 Series Inverters

Here are the specifications of the GoodWe SDT G2 Series Inverters, compiled from the provided datasheet:

Model Options:

• GW17KT-DT
• GW20KT-DT
• GW25KT-DT

Input Specifications:

• Max. Input Voltage: 1100V
• MPPT Operating Voltage Range: 200 ~ 950V
• Start-Up Voltage: 180V
• Nominal Input Voltage: 620V
• Max. Input Current per MPPT:
  • GW17KT-DT and GW20KT-DT: 25.0A
  • GW25KT-DT: 37.5A / 25.0A
• Max. Short Circuit Current per MPPT:
  • GW17KT-DT and GW20KT-DT: 31.2A
  • GW25KT-DT: 46.8A / 31.2A
• Number of MPP Trackers: 2
• Number of Strings per MPPT:
  • GW17KT-DT and GW20KT-DT: 2
  • GW25KT-DT: 3 / 2
• DC Connector: MC4 (4~6 mm²)

Output Specifications:

• Nominal Output Power:
  • GW17KT-DT: 17000W
  • GW20KT-DT: 20000W
  • GW25KT-DT: 25000W
• Nominal Output Apparent Power:
  • GW17KT-DT: 17000VA
  • GW20KT-DT: 20000VA
  • GW25KT-DT: 25000VA
• Max. AC Active Power:
  • GW17KT-DT: 19000W
  • GW20KT-DT: 22000W
  • GW25KT-DT: 27500W
• Max. AC Apparent Power:
  • GW17KT-DT: 19000VA
  • GW20KT-DT: 22000VA
  • GW25KT-DT: 27500VA
• Nominal Output Voltage: 400V, 3L/N/PE
• Output Voltage Range: 180 ~ 270V (according to local standard)
• Nominal AC Grid Frequency: 50 / 60Hz
• AC Grid Frequency Range: 45 ~ 55 / 55 ~ 65Hz
• Max. Output Current:
  • GW17KT-DT: 28.8A
  • GW20KT-DT: 31.9A
  • GW25KT-DT: 40.8A
• Power Factor: ~1 (Adjustable from 0.8 leading to 0.8 lagging)
• Max. Total Harmonic Distortion: <3%
• AC Connector: Not specified in the source

Efficiency:

• Max. Efficiency: 98.4%
• European Efficiency: 97.7%

Protection Features:

• PV Insulation Resistance Detection
• Residual Current Monitoring
• PV Reverse Polarity Protection
• Anti-islanding Protection
• AC Overcurrent Protection
• AC Short Circuit Protection
• AC Overvoltage Protection
• DC Switch
• DC Surge Protection: Type III (Type II optional)
• AC Surge Protection: Type III
• AFCI: Optional

General Data:

• Operating Temperature Range: -30°C to +60°C
• Relative Humidity: 0 ~ 100%
• Max. Operating Altitude:
  • 4000m (except Australia)
  • 3000m (Australia only)
• Cooling Method: Smart Fan Cooling
• User Interface: LCD, LED (Optional), WLAN + App
• Communication: WiFi, RS485, or LAN (optional)
• Communication Protocols: Modbus-RTU (SunSpec Compliant)
• Weight: 25.0 kg
• Dimensions (W x H x D): 415 mm x 511 mm x 175 mm
• Topology: Non-isolated
• Self-consumption at Night: <1W
• Ingress Protection Rating: IP65