Deye SUN-18/20/21K-G04-LV
18kW three phase LV string inverter with 98.6% efficiency for 127V/220V grids.
Download PDF Datasheet WhatsApp UsTechnical Specifications
| Parameter | SUN-18K-G04-LV | SUN-20K-G04-LV | SUN-21K-G04-LV |
|---|---|---|---|
| PV String Input Data | |||
| Max PV Input Power | 27 kW | 30 kW | 31.5 kW |
| Max PV / DC Voltage | 800 V | ||
| Max PV Input / Array Open Circuit Voltage | 800 V | ||
| Max PV Input Current | 40+40 A | ||
| MPPT Efficiency | >99% | ||
| MPPT Voltage Range | 200 V – 700 V | ||
| MPPT Voltage Range at Full Load | 250 V – 700 V | 300 V – 700 V | 300 V – 700 V |
| Number of MPP Trackers | 2 | ||
| Start-up Voltage | 250 V | ||
| Max PV Short-Circuit Current | 60+60 A | ||
| MPPT Nominal Voltage | 350 V | ||
| Electrical / AC Output Data | |||
| European Efficiency | 98.1% | ||
| Max AC Apparent Power | 18 kVA | 20 kVA | 21 kVA |
| Max Efficiency | 98.6% | ||
| Rated AC Power | 18 kW | 20 kW | 21 kW |
| AC Grid Connection Type | 3L+N+PE | ||
| Grid / AC Frequency | 50Hz/45Hz-55Hz,60Hz/55Hz-65 | ||
| Nominal AC Voltage | 127V/220V, 133V/230V | ||
| Output Voltage Range | 127V/220V, 133V/230V 0.85Un-1.1Un | ||
| Rated AC Output Current | 47.3/45.2 A | 52.5/50.2 A | 55.2/52.7 A |
| THD / THDi | <3% | ||
| Adjustable Power Factor Range | 0.8leading-0.8lagging | ||
| Max AC Output Current | 47.3/45.2 A | 52.5/50.2 A | 55.2/52.7 A |
| Protection Features | |||
| IP Rating | IP65 | ||
| AC/DC Surge Protection | TYPE II(DC), TYPE II(AC) | ||
| Anti-Islanding Protection | yes | ||
| Over-Temperature / Thermal Protection | yes | ||
| Residual Current Monitoring Unit | yes | ||
| Operating Conditions | |||
| Max Altitude | 2,000 m | ||
| Operating Temperature | -25 to 65 °C | ||
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.
Availability & grid compliance in Italy
| Market | Italy |
| Grid authority / regulator | ARERA Italy |
| Quotation currency | EUR |
| Support hours timezone | Europe/Rome |
| Delivery & installation coverage | Rome, Milan, Naples, Turin |
Figures on this page are the manufacturer's own, measured at the test conditions the datasheet states — they do not change by country. What changes is the approval that has to be met before the unit is energised: in Italy that is ARERA Italy. Confirm the grid code, import requirements and any local certification with them, or with us, before you order.
Key Features & Technical Highlights
- 98.6% Efficiency: Maximum energy conversion
- Dual MPPT: Two independent trackers
- LV Compatible: 127V/220V, 133V/230V grids
- Zero Export & VSG: Self-consumption & grid support
- Anti-PID: Prevents panel degradation
- Smart Monitoring: Optional string monitoring
Frequently Asked Questions
Is the DEYE SUN-18K-G04-LV suitable for the Middle East climate?
Yes. DEYE inverters are rated for high ambient temperatures and dusty conditions common across the Gulf, North Africa and the wider MEA region, with IP-rated enclosures for outdoor installation in shaded areas.
What voltage systems is this compatible with?
The SUN-18K-G04-LV is specifically designed for low-voltage grids, supporting 127V/220V and 133V/230V systems.
Does it support Anti-PID?
Yes! The optional Anti-PID function helps prevent power degradation caused by Potential Induced Degradation in PV modules.