Deye SUN-18/20/22/23/25K-G05
This datasheet provides complete technical specifications for the SUN-18/20/22/23/25K-G05 models. Key specifications include a maximum efficiency of 98.5%, IP65 protection rating, and dual MPPT trackers. Designed for commercial rooftop applications in the GCC region.
Technical Specifications
| Parameter | SUN-18K-G05 | SUN-20K-G05 | SUN-22K-G05 | SUN-23K-G05 | SUN-25K-G05 |
|---|---|---|---|---|---|
| PV String Input Data | |||||
| Max. PV Input Power (kW) | 23.4 | 26 | 28.6 | 29.9 | 32.5 |
| Max. PV Input Voltage (V) | 1100 | ||||
| Start-up Voltage (V) | 250 | ||||
| MPPT Voltage Range (V) | 200-1000 | ||||
| Rated PV Input Voltage (V) | 600 | ||||
| Max. Operating PV Input Current (A) | 26+26 | ||||
| Max. Input Short Circuit Current (A) | 39+39 | ||||
| No. of MPPT Trackers / No. of Strings per MPPT Tracker | 2/2+2 | ||||
| AC Output Data | |||||
| Rated AC Output Active Power (kW) | 18 | 20 | 22 | 23 | 25 |
| Max. AC Output Apparent Power (kVA) | 19.8 | 22 | 24.2 | 25.3 | 27.5 |
| Rated AC Output Current (A) | 27.3/26.1 | 30.3/29 | 33.4/31.9 | 34.9/33.4 | 37.9/36.2 |
| Max. AC Output Current (A) | 30/28.7 | 33.3/31.9 | 36.7/35.1 | 38.4/36.7 | 41.7/39.8 |
| Rated Output Voltage/Range (V) | 220/380V, 230/400V, 0.85Un-1.1Un | ||||
| Grid Connection Form | 3L/N/PE | ||||
| Rated Output Grid Frequency/Range (Hz) | 50/45-55, 60/55-65 | ||||
| Power Factor Adjustment Range | 0.8 leading to 0.8 lagging | ||||
| Total Current Harmonic Distortion THDi | <3% | ||||
| DC Injection Current | <0.5%In | ||||
| Efficiency | |||||
| Max. Efficiency | 98.5% | ||||
| Euro Efficiency | 98% | ||||
| MPPT Efficiency | >99% | ||||
| Protection Features | |||||
| DC Reverse Polarity Protection | Yes | ||||
| AC Output Overcurrent Protection | Yes | ||||
| AC Output Overvoltage Protection | Yes | ||||
| AC Output Short Circuit Protection | Yes | ||||
| Thermal Protection | Yes | ||||
| Insulation Impedance Detection | Yes | ||||
| DC Component Monitoring | Yes | ||||
| AFCI | Optional | ||||
| Anti-islanding Protection | Yes | ||||
| Residual Current Detection | Yes | ||||
| Surge Protection Level | TYPE II(DC), TYPE II(AC) | ||||
| DC Switch | Yes | ||||
| Communication | |||||
| Communication Interface | RS485/RS232 | ||||
| Monitor Mode | GPRS/WIFI/Bluetooth/4G/LAN(optional) | ||||
| Mechanical Data | |||||
| Dimensions (W×H×D mm) | 362×527×220 | ||||
| Weight (kg) | 20 | ||||
| Ingress Protection (IP) Rating | IP65 | ||||
| Operating Conditions | |||||
| Operating Temperature Range (°C) | -25 to +60, <45°C Derating | ||||
| Permissible Ambient Humidity | 0-100% | ||||
| Permissible Altitude (m) | 4000 | ||||
| Noise (dB) | <50 | ||||
Note: Specifications are based on the official Deye SUN-18/20/21K-G04-LV datasheet. Values may be subject to change; always verify against the latest manufacturer documentation before system design and procurement.
Key Features & Technical Highlights
Dual MPPT for LV Three-Phase Systems
The SUN-18/20/21K-G04-LV series incorporates two independent MPPT trackers optimized for low-voltage three-phase grid connections. Each MPPT supports 3 strings (3+3 configuration), enabling flexible array designs across different roof orientations or partial shading scenarios.
With a wide MPPT voltage range of 200V to 700V and rated DC bus voltage of 350V, the inverter accommodates various string configurations while maintaining peak efficiency on LV 127V/220V and 133V/230V networks.
Industry-Leading Efficiency
Maximum conversion efficiency of 98.6% combined with MPPT tracking efficiency exceeding 99% minimizes energy losses throughout the system lifetime. This high efficiency directly translates to improved energy yield and faster return on investment for commercial installations.
Comprehensive Protection Suite
- DC Side: Reverse polarity protection, surge protection (Type II), integrated DC switch
- AC Side: Overcurrent, overvoltage, and short circuit protection with Type II surge protection
- System Safety: Anti-islanding, residual current detection, insulation impedance monitoring
- Thermal Management: Intelligent air cooling with automatic derating above 45°C
- Optional: Arc Fault Circuit Interrupter (AFCI) for enhanced fire safety
Smart Monitoring & Grid Support
Standard RS485/RS232 communication ports with optional GPRS, WiFi, Bluetooth, 4G, and LAN connectivity enable comprehensive remote monitoring. Zero Export and VSG (Virtual Synchronous Generator) applications provide advanced grid interaction capabilities for self-consumption optimization and grid stability support.
Applications & Use Cases
Typical Applications
- Commercial rooftops
- Warehouses and logistics centers
- Industrial plants
- Office buildings
- Shopping malls
Installation Notes (Oman)
Climate Suitability: Hot desert climate with monsoon in the south. Coastal areas have high humidity. Excellent solar resources.
Regulatory: Coordinate with AER for grid connection requirements.
- Ensure proper ventilation to maintain optimal performance in high temperatures.
- Coordinate with local utilities for grid connection approvals.
- Consider additional surge protection in areas with frequent lightning.
Model Selection Guide
Selecting between the SUN-18K, SUN-20K, and SUN-21K-G04-LV depends on:
- Array Size: Match PV array DC capacity to inverter input power (DC/AC ratio typically 1.1–1.3×)
- Available LV Service Capacity: Verify main breaker and feeder ampacity can accommodate inverter output current
- Load Profile: Size to typical daytime load for maximum self-consumption in zero-export applications
- Expansion Plans: Consider future load growth when selecting inverter capacity
| Model | AC Output | Max PV Input | Typical Array Size* |
|---|---|---|---|
| SUN-18K-G04-LV | 18 kW | 23.4 kW | 19.8 – 23.4 kWp |
| SUN-20K-G04-LV | 20 kW | 26 kW | 22 – 26 kWp |
| SUN-21K-G04-LV | 21 kW | 27.3 kW | 23.1 – 27.3 kWp |
*Based on DC/AC ratio of 1.1–1.3× for optimal energy harvest in high-irradiance locations.
Frequently Asked Questions
What is the maximum efficiency of the SUN-18/20/22/23/25K-G05?
The SUN-18/20/22/23/25K-G05 series achieves a maximum efficiency of 98.5%. This high efficiency is complemented by an MPPT efficiency greater than 99%.
What grid voltages does the SUN-18/20/22/23/25K-G05 support?
The SUN-18/20/22/23/25K-G05 supports grid voltages of 220/380V and 230/400V. It is compatible with a grid connection form of 3L/N/PE.
How many MPPT trackers does the SUN-18/20/22/23/25K-G05 have?
The SUN-18/20/22/23/25K-G05 is equipped with 2 MPPT trackers. Each tracker can handle 2 strings, providing flexibility in PV array design.
What is the warranty for the SUN-18/20/22/23/25K-G05?
The SUN-18/20/22/23/25K-G05 comes with a 5-year manufacturer warranty. This warranty covers defects in materials and workmanship.
Is the SUN-18/20/22/23/25K-G05 suitable for outdoor installation?
Yes, the SUN-18/20/22/23/25K-G05 is suitable for outdoor installation with an IP65 rating. This ensures protection against dust and water ingress.
What protection features does the SUN-18/20/22/23/25K-G05 include?
The SUN-18/20/22/23/25K-G05 includes DC reverse polarity protection, AC output overcurrent protection, and thermal protection. It also features anti-islanding protection and surge protection.
Can the SUN-18/20/22/23/25K-G05 be used in Oman?
Yes, the SUN-18/20/22/23/25K-G05 can be used in the Oman region. It supports a wide range of operating temperatures from -25°C to +60°C, suitable for hot climates.
What monitoring options are available for the SUN-18/20/22/23/25K-G05?
The SUN-18/20/22/23/25K-G05 offers monitoring options via GPRS, WIFI, Bluetooth, 4G, and LAN. These options provide flexibility in remote monitoring and management.