Deye SUN-18/20/21K-G04-LV On Grid Inverter
- Category: On-Grid Inverter
- Features
Product Description
Deye SUN-18/20/21K-G04-LV On Grid Inverter
The Deye SUN-18/20/21K-G04-LV is a high-efficiency three-phase low-voltage on-grid solar inverter designed for residential and commercial photovoltaic (PV) systems. Available in 18kW, 20kW, and 21kW models, it features two independent MPPT trackers, a maximum efficiency of 98.6%, and support for 127V/220V and 133V/230V three-phase grid configurations. With zero-export functionality, optional intelligent PV string monitoring, and comprehensive electrical protection, this Deye three-phase string inverter helps improve solar energy utilization and system reliability.
Product Features
High Conversion Efficiency: Maximum efficiency of 98.6% and MPPT efficiency above 99% for effective solar energy conversion.
Dual MPPT Technology: Two independent MPPT trackers support flexible PV string configurations and optimized energy harvesting.
Three-Phase Low-Voltage Output: Supports 127V/220V and 133V/230V grid systems at 50/60Hz.
Zero-Export Function: Supports self-consumption applications that help limit excess solar power fed into the grid.
Smart Monitoring: Optional intelligent PV string monitoring and communication via Wi-Fi, GPRS, Bluetooth, 4G, or LAN, depending on configuration.
Comprehensive Protection: Includes DC reverse-polarity, AC overcurrent, overvoltage, short-circuit, thermal, and anti-islanding protection.
Optional Anti-PID Function: Helps mitigate potential-induced degradation in compatible PV modules.
Specifications
Specification | SUN-18K-G04-LV | SUN-20K-G04-LV | SUN-21K-G04-LV |
|---|---|---|---|
Rated AC output power | 18 kW | 20 kW | 21 kW |
Max. PV input power* | 27 kW | 30 kW | 31.5 kW |
Max. PV input voltage | 800 V | 800 V | 800 V |
Start-up voltage | 250 V | 250 V | 250 V |
MPPT voltage range | 200–700 V | 200–700 V | 200–700 V |
Rated PV input voltage | 350 V | 350 V | 350 V |
Max. operating input current | 40 + 40 A | 40 + 40 A | 40 + 40 A |
Max. input short-circuit current | 60 + 60 A | 60 + 60 A | 60 + 60 A |
MPPT trackers / strings | 2 / 3+3 | 2 / 3+3 | 2 / 3+3 |
Max. AC apparent power | 18 kVA | 20 kVA | 21 kVA |
Rated AC output voltage | 127/220 V, 133/230 V | 127/220 V, 133/230 V | 127/220 V, 133/230 V |
Rated AC output current | 47.3/45.2 A | 52.5/50.2 A | 55.2/52.7 A |
Grid frequency | 50/60 Hz | 50/60 Hz | 50/60 Hz |
Max. efficiency | 98.6% | 98.6% | 98.6% |
MPPT efficiency | Above 99% | Above 99% | Above 99% |
Total harmonic distortion | Below 3% | Below 3% | Below 3% |
Cooling | Intelligent air cooling | Intelligent air cooling | Intelligent air cooling |
Ingress protection | IP65 | IP65 | IP65 |
Communication | RS485/RS232; optional wireless/network monitoring | Same | Same |
Operating temperature | -25°C to +65°C, with derating above 45°C | Same | Same |
Maximum operating altitude | 2,000 m | 2,000 m | 2,000 m |
Warranty | 5 years | 5 years | 5 years |
FAQ
Q1: What is the Deye SUN-18/20/21K-G04-LV inverter?
It is a three-phase low-voltage on-grid string inverter available in 18kW, 20kW, and 21kW models for residential and commercial solar PV installations.
Q2: How many MPPT trackers does the Deye SUN-G04-LV have?
It features two independent MPPT trackers, supporting multiple PV strings and flexible solar array configurations.
Q3: What is the maximum efficiency of the Deye SUN-18/20/21K-G04-LV?
The inverter has a maximum conversion efficiency of 98.6% and MPPT efficiency above 99%.
Q4: Does this Deye inverter support zero export?
Yes. It supports zero-export applications, helping solar installations prioritize on-site energy consumption and limit electricity fed back into the grid.
Q5: Can the Deye SUN-G04-LV be used in commercial solar systems?
Yes. Its 18–21kW output range and three-phase low-voltage design make it suitable for compatible commercial and larger residential PV systems. Grid voltage, local regulations, and system design must be checked before installation.
