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The DEYE SUN-18K-G04 is designed for three-phase photovoltaic installations connected to the utility grid. It delivers a rated output power of 18kW and can reach a maximum active power of 19.8kW.
Its two MPPT trackers support two strings each, providing a total of four photovoltaic inputs. The maximum supported PV input power is 23.4kW, while the MPPT operating range is 200–850V.
The inverter achieves a maximum efficiency of 98.6% and includes protection functions for both its DC and AC circuits. Its IP65-rated enclosure, intelligent cooling system and multiple communication interfaces allow integration into large residential and commercial photovoltaic installations.
Key Features
- Three-phase on-grid operation
- 18kW rated output power
- 19.8kW maximum active power
- 23.4kW maximum PV input power
- Two MPPT trackers
- Two strings per MPPT
- Zero Export function and VSG application
- Smart string monitoring – optional
- Anti-PID function – optional
- Type II DC and AC surge protection
- RS485, RS232, Wi-Fi and LAN communication
- IP65-rated enclosure
- Intelligent cooling system
Benefits
Four String Inputs
The two MPPT trackers, with two strings per MPPT, provide flexible PV array design and independent management of two panel groups.
PV Input Power of up to 23.4kW
The maximum supported DC input power allows controlled PV array oversizing relative to the inverter’s rated output.
High Efficiency
The maximum efficiency of 98.6% and MPPT efficiency of over 99% help minimise conversion losses.
Remote Monitoring and Configuration
The available interfaces support system monitoring, remote software updates and remote adjustment of operating parameters, subject to the manufacturer’s requirements.
Recommended Applications
- Large residential three-phase photovoltaic systems
- Commercial installations
- Office buildings
- Manufacturing premises and warehouses
- Rooftop or ground-mounted on-grid photovoltaic systems
- Applications requiring the limitation of energy exported to the grid
| General Information |
| Manufacturer |
DEYE |
| Model |
SUN-18K-G04 |
| V-TAC SKU |
12721 |
| Inverter Type |
On-grid, three-phase |
| Photovoltaic Input |
| Maximum PV Input Power |
23.4kW |
| Maximum PV Input Voltage |
1000V |
| Start-Up Voltage |
250V |
| MPPT Operating Range |
200–850V |
| Maximum DC Input Current |
32A + 32A |
| Maximum Short-Circuit Current |
48A + 48A |
| MPPT Trackers / Strings per MPPT |
2 / 2 + 2 |
| AC Output |
| Rated Output Power |
18kW |
| Maximum Active Power |
19.8kW |
| Rated Grid Voltage |
220/380V, 230/400V |
| AC Voltage Range |
277–460V AC, depending on the applicable grid standard |
| Phase |
Three-phase |
| Rated Frequency |
50Hz / 60Hz, optional |
| Frequency Range |
47–52Hz or 57–62Hz, optional |
| Rated Output Current at 400V |
26.1A |
| Maximum Output Current at 400V |
28.7A |
| Power Factor Range |
0.8 leading to 0.8 lagging |
| Total Harmonic Distortion (THDi) |
<3% |
| DC Current Injection |
<0.5% |
| Efficiency |
| Maximum Efficiency |
98.6% |
| European Efficiency |
97.8% |
| MPPT Efficiency |
>99% |
| Protection |
| Integrated Protection Functions |
DC reverse-polarity protection, AC short-circuit protection, AC overcurrent protection, output overvoltage protection, insulation resistance monitoring, ground-fault protection and thermal protection |
| Anti-Islanding Protection |
Yes |
| Integrated DC Switch |
Yes |
| Surge Protection |
Type II DC / Type II AC |
| Interface and Communication |
| Display |
240 × 160 LCD |
| Interfaces |
RS485 / RS232 / Wi-Fi / LAN |
| Remote Software Updates |
Yes |
| Remote Parameter Adjustment |
Yes |
| General Characteristics |
| Dimensions |
400 × 520 × 240.5mm |
| Weight |
28kg |
| Topology |
Transformerless |
| Night-Time Power Consumption |
<1W |
| Operating Temperature |
-25°C to +65°C |
| Permissible Ambient Humidity |
0–100% |
| Maximum Altitude Without Power Derating |
2000m |
| Ingress Protection Rating |
IP65 |
| Typical Noise Level |
<45dB |
| Cooling System |
Intelligent cooling |
| Designed Service Life |
Over 20 years |
| DC Connection |
MC4-compatible |
| AC Connection |
IP65-rated connector |
| Commercial Warranty |
5 years |
| Standards |
| Grid Connection Standards |
EN 50549-1, VDE 0126-1-1 |
| Safety and EMC Standards |
IEC 62109-1/-2, IEC 61000-6-2, IEC 61000-6-4 |
Compatibility and Important Information
This is an on-grid inverter. It does not have a battery connection or a dedicated backup output for supplying electrical loads during a grid outage.
Using the Zero Export function requires the appropriate configuration and compatible metering equipment specified by the manufacturer.
The PV strings must be sized according to the panels’ Voc, Vmp, Isc and Imp values, the temperatures at the installation site and the electrical limits of each MPPT tracker.
Installation, configuration and commissioning must be carried out by qualified personnel in accordance with the manufacturer’s instructions and all applicable regulations.
