Sungrow SG15/20RT String Inverter Review

Sungrow

Multi-MPPT String Inverter for 1000 Vdc System

The Sungrow SG15/20RT inverter presents a compelling option for Australian homeowners seeking a high-efficiency, feature-rich inverter for their solar power systems. Its multi-MPPT technology, wide operating range, and smart functionalities make it a strong contender in the market.

sungrow-sg15-20rt-string-inverter

Key features of the Sungrow SG15/20RT String Inverter

  • High efficiency: The SG15/20RT shines with a maximum efficiency of 98.5%, ensuring you maximise solar energy production.
  • Multi-MPPT technology: This inverter features two Maximum Power Point Tracking (MPPT) inputs, allowing you to optimise power generation even with varying sunlight conditions on your roof.
  • Wide MPPT voltage range: Compared to some competitors, the inverter operates within a wider MPPT voltage range (160-1000V). This increases efficiency during low-light conditions, capturing more sunlight throughout the day.
  • Smart functionality: The SG15/20RT boasts features like 24/7 live monitoring, over-the-air firmware updates, and smart IV curve scanning for system health diagnostics. You can conveniently monitor your system’s performance via the iSolarCloud platform or a user-friendly app.
  • Durability: Engineered with a high anti-corrosion rating (C5), the SG15/20RT is built to withstand Australia’s harsh weather conditions.
  • Easy installation: The inverter’s compact design (21kg) and unique push-in connectors make installation a breeze.

Specifications of the Sungrow SG15/20RT String Inverter

  • Model variants: SG15RT, SG20RT
  • No. of PV strings per MPPT: 2 / 2
  • No. of independent MPP inputs: 2
  • Efficiency: Up to 98.5%
  • Maximum AC power output: 15kW (SG15RT) or 20kW (SG20RT)
  • Dimensions (W x H x D): 370 * 480 * 195 mm
  • Weight: 21 kg

Sungrow SG15/20RT String Inverter warranty

Sungrow offers a standard 10-year warranty on the SG15/20RT inverter, providing peace of mind for your investment. Extended warranty options may be available through your solar installer. Sungrow also boasts a reliable after-sales support network in Australia.

Applications for the Sungrow SG15/20RT String Inverter

The Sungrow SG15/20RT is primarily designed for residential solar power systems. Here are some typical applications:

  • Single-family homes: This inverter is a great fit for powering a typical Australian household with its 15kW to 20kW output range.
  • Small commercial buildings: The SG15/20RT’s efficiency and features can also benefit businesses with moderate energy demands.

Pros of the Sungrow SG15/20RT String Inverter

  • High efficiency and yield: With a maximum efficiency of 98.5%, the Sungrow SG15/20RT maximises energy production from your solar panels. Its wider MPPT voltage range and lower startup threshold ensure you capture more sunlight throughout the day.
  • Smart management features: The inverter offers 24/7 live monitoring, smart IV curve scanning for system health checks, and over-the-air firmware updates for improved performance and bug fixes.
  • Durable design: The SG15/20RT has a high anti-corrosion rating (C5) and is designed to withstand harsh Australian weather conditions.
  • Easy installation and use: The compact, lightweight design with push-in connectors simplifies installation. Commissioning is fast and user-friendly via a dedicated app.
  • Multi-MPPT capability: The inverter’s two independent MPPT trackers allow optimal solar energy production even with shading or mismatched panels on your roof.
  • Bifacial module compatibility: Get the most out of bifacial solar panels, which capture sunlight from both sides, with the SG15/20RT’s built-in compatibility.

Cons of the Sungrow SG15/20RT String Inverter

  • Not Suitable for Small Systems: With a 15kW capacity, this inverter might be overkill for smaller residential solar power systems.
  • No battery storage integration: This inverter model doesn’t support direct integration, though it may be compatible with separate battery storage systems.

Is the Sungrow SG15/20RT String Inverter right for you?

The SG15/20RT is a strong contender for homeowners in Australia looking for a high-efficiency, feature-rich inverter for their solar power system. Here’s a breakdown to help you decide:

  • Ideal for: Homes with larger rooftop spaces and high power requirements (around 15kW or more).
  • Well-suited for: Rooftops with uneven sun exposure due to the multi-MPPT functionality.
  • Important to consider: The inverter’s higher power output comes at a slightly higher cost than some lower-powered models.

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