Sungrow SG33CX / SG40CX / SG50CX Solar Inverter – High-Efficiency Multi-MPPT String Inverter

Sungrow SG33CX / SG40CX / SG50CX Solar Inverter – High-Efficiency Multi-MPPT String Inverter

The Sungrow SG33CX / SG40CX / SG50CX is a high-performance, three-phase string inverter designed for commercial and industrial solar systems. With 5 MPPTs, a maximum efficiency of 98.7%, and PID recovery technology, it ensures higher energy yields and long-term reliability.

Sungrow SG33CX / SG40CX / SG50CX Solar Inverter – High-Efficiency Multi-MPPT String Inverter

Sungrow SG33CX / SG40CX / SG50CX Solar Inverter – High-Efficiency Multi-MPPT String Inverter

The Sungrow SG33CX / SG40CX / SG50CX is a multi-MPPT, three-phase string inverter designed for commercial and industrial solar power plants. With power ratings from 33 kW to 50 kW, this inverter offers maximum system flexibility and high energy conversion efficiency (up to 98.7%).

Equipped with 5 independent MPPTs, the Sungrow inverter optimizes energy harvesting from multiple PV strings, ensuring consistent performance even under shading conditions. Its built-in PID recovery function prevents long-term power loss, while Type II surge protection (SPD) for both DC and AC ensures system safety.

Designed for long-term durability, the IP66-rated inverter is resistant to dust and water, making it ideal for challenging environments. Smart O&M features, including touch-free commissioning, remote firmware updates, and online IV curve scanning, simplify maintenance and reduce operational costs.

With grid compliance, compatibility with bifacial modules, and support for aluminum & copper AC cables, the Sungrow SG33CX / SG40CX / SG50CX series provides a cost-effective and future-proof solution for commercial solar projects.

Key Features

<p>✅ <strong data-start="2033" data-end="2052">High Efficiency</strong> – <strong data-start="2055" data-end="2086">Up to 98.7% peak efficiency</strong> for <strong data-start="2091" data-end="2120">maximum energy conversion</strong>.<br>✅ <strong data-start="2126" data-end="2143">5 MPPT Design</strong> – <strong data-start="2146" data-end="2177">Optimized energy harvesting</strong> from multiple PV arrays.<br>✅ <strong data-start="2207" data-end="2232">PID Recovery Function</strong> – Reduces <strong data-start="2243" data-end="2264">power degradation</strong> and extends module lifespan.<br>✅ <strong data-start="2298" data-end="2321">Advanced Protection</strong> – <strong data-start="2324" data-end="2393">Type II SPD for DC &amp; AC, IP66 protection, and anti-PID technology</strong>.<br>✅ <strong data-start="2399" data-end="2412">Smart O&amp;M</strong> – <strong data-start="2415" data-end="2486">Remote monitoring, IV curve diagnosis, and touch-free commissioning</strong>.<br>✅ <strong data-start="2492" data-end="2523">Flexible System Integration</strong> – <strong data-start="2526" data-end="2584">Supports bifacial modules, aluminum &amp; copper AC cables</strong>.<br>✅ <strong data-start="2590" data-end="2607">Robust Design</strong> – <strong data-start="2610" data-end="2676">Dust and water-resistant (IP66), withstands harsh environments</strong>.<br>✅ <strong data-start="2682" data-end="2701">Grid Compliance</strong> – Compatible with <strong data-start="2720" data-end="2745">global grid standards</strong>.</p>

Specifications

✅ Electrical Characteristics (DC Input)

Max. PV Input Voltage: 1100V Min. PV Input Voltage / Start-up Voltage: 200V / 250V Nominal PV Input Voltage: 585V MPP Voltage Range: 200V – 1000V MPP Voltage Range for Nominal Power: 550V – 850V No. of Independent MPPTs: 5 Max. Number of PV Strings per MPPT: 3 (SG33CX) / 4 (SG40CX) / 5 (SG50CX) Max. PV Input Current: 130A Max. Current for Input Connector: 200A Max. DC Short-Circuit Current: 200A

✅ Electrical Characteristics (AC Output)

AC Output Power (@40°C): 36.3 kVA (SG33CX) / 44 kVA (SG40CX) / 55 kVA (SG50CX) AC Output Power (@45°C): 33 kVA (SG33CX) / 40 kVA (SG40CX) / 50 kVA (SG50CX) Max. AC Output Current: 55.2A (SG33CX) / 66.9A (SG40CX) / 83.6A (SG50CX) Nominal AC Voltage: 230 / 400V AC Voltage Range: 312V – 528V Nominal Grid Frequency: 50Hz / 60Hz Total Harmonic Distortion (THD): < 3% Power Factor: Adjustable (0.8 leading – 0.8 lagging)

✅ Efficiency & Performance

Max. Efficiency: 98.7% European Efficiency: 98.4%

✅ Protection & Safety Features

Reverse Polarity Protection (DC): Yes AC Short Circuit Protection: Yes Leakage Current Protection: Yes Grid Monitoring & Anti-Islanding Protection: Yes PV String Current Monitoring: Yes Type II Surge Protection (DC & AC): Yes PID Recovery Function: Optional

✅ Physical Characteristics

Dimensions (W x H x D):

  • SG33CX: 702 × 595 × 310 mm
  • SG40CX: 782 × 645 × 310 mm
  • SG50CX: 782 × 645 × 310 mm

Weight:

  • SG33CX: 50 kg
  • SG40CX: 58 kg
  • SG50CX: 62 kg
✅ Operating Conditions

Cooling Method: Smart Forced Air Cooling Degree of Protection: IP66 Operating Temperature Range: -30°C to +60°C Max. Operating Altitude: 4000m (Derating above 3000m) Night Power Consumption: ≤2W

✅ Communication & Monitoring

Display: LED, Bluetooth + Mobile App Communication Interfaces: RS485, Optional Wi-Fi & Ethernet Remote Monitoring: Yes (Online IV Curve Diagnosis, Firmware Updates)

✅ Grid Compliance & Certifications

IEC 62109, IEC 61727, IEC 62116 IEC 60068, IEC 61683, VDE-AR-N 4105/4110:2018 EN 50438, AS/NZS 4777.2:2015, CEI 0-21, DEWA Grid Support: Q at Night, LVRT, HVRT, Active & Reactive Power Control

Why Choose This Product?

Switching to this product ensures reduced energy costs, enhanced reliability, and long-term performance for your needs.

Our Guarantee

We stand behind the quality of our products and services. Each component comes with its own warranty, plus our comprehensive KFP Warranty for your peace of mind.

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With a track record of success in residential, commercial, and industrial sectors, we’ve delivered sustainable energy solutions that make a difference. From cutting-edge technology to client-focused service, we redefine solar energy standards.

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