98.6% Efficiency
Maximum energy conversion

18kW three phase LV string inverter with 98.6% efficiency for 127V/220V grids.
The Deye SUN-18K-G04-LV is a high-performance three-phase string inverter for residential and commercial solar installations. With 18kW power range, 98.6% max efficiency, dual MPPT trackers, 200-700V MPPT range, 127V/220V or 133V/230V output, zero export and VSG support, Anti-PID function, and IP65 protection, it's designed for low-voltage grid environments.
| Arc fault circuit interrupter (AFCI) | Optional |
|---|---|
| DC Injection Current | <0.5%In |
| Full Load MPPT Voltage Range(V) | 250-700 |
| MPPT Voltage Range(V) | 200-700 |
| Max. Input Short Circuit Current (A) | 60+60 |
| Max. Operating PV Input Current(A) | 40+40 |
| Max. Output Fault Current (A) | 90.4 |
| Max. Output Overcurrent Protection (A) | | 93.3 |
| Max. PV Input Power(kW) | 27 |
| Max. PV Input Voltage(V) | 800 |
| Max.AC Output Apparent Power(KVA) | 18 |
| Max.AC Output Current(A) | 47.3/45.2 |
| PV Input Voltage Range(V) | 250-800 |
| Rated AC Output Active Power(kW) | 18 |
| Rated AC Output current (A) | 47.3/45.2 |
| Rated Output voltage/range (V) | 127V/ |
| Rated PV Input Voltage(V) | 350 |
| Start-up Voltage(V) | 250 |
| Max. Output Overcurrent Protection | 93.3 A |
| PV Input Voltage Range | 250-800 V |
| Type | String Inverter |
| No. of Strings MPP Tracker | 3+3 |
| No. of MPP Trackers/ No. of Strings MPP Tracker | 2/3+3 |
| Anti-islanding protection | yes |
| Communication Interface | RS485/RS232 |
| Euro Efficiency | 98.1% |
| Full Load MPPT Voltage Range | 250-700 V |
| Grid Connection Form | 3L+N+PE |
| Grid Regulation | NBR 16149, NBR 16150, EN 50549, RD 140 |
| Inverter Topology | Non-Isolated |
| MPPT Efficiency | >99% |
| MPPT Voltage Range | 200-700 V |
| Max. Input Short Circuit Current | 60+60 A |
| Max. Inverter Backfeed Current To the Array | 0 |
| Max. Operating PV Input Current | 40+40 A |
| Max. Output Fault Current | 90.4 A |
| Max. PV Input Power | 27 kW |
| Max. PV Input Voltage | 800 V |
| Max.AC Output Apparent Power | 18 kVA |
| Max.AC Output Current | 47.3/45.2 A |
| Max.Efficiency | 98.6% |
| Monitor Mode | GPRS/WIFI/Bluetooth/4G/LAN(optional) |
| Over Voltage Category | OVC II(DC),OVC III(AC) |
| Power Factor Adjustment Range | 0.8 leading-0.8lagging |
| Rated AC Output Active Power | 18 kW |
| Rated AC Output current | 47.3/45.2 A |
| Rated Output Grid Frequency/range | 50Hz/45Hz-55Hz, 60Hz/55Hz-65 Hz |
| Rated Output voltage/range | 127V/220V, 133V/230V 0.85Un-1.1Un V |
| Rated PV Input Voltage | 350 V |
| Residual Current Detection | yes |
| Safety EMC/Standard | IEC/EN 61000-6-1/2/3/4, IEC/EN 62109-1, IEC/EN 62109-2 |
| Start-up Voltage | 250 V |
| Surge Protection Level | TYPE II(DC),TYPE II(AC) |
| Thermal Protection | yes |
| Total Current Harmonic Distortion THDi | <3% |
| LCD/LED display | LCD1602 |
| Rated AC Power | 18 kW |
| Max PV Voltage | 800 V |
| MPPT Trackers | 2 |
| Rated Output Voltage | 127V/220V, 133V/230V |
| Type Of Cooling | Intelligent air cooling |
|---|---|
| Ingress Protection(IP) Rating | IP 65 |
| IP Rating | IP65 |
| Noise | ≤ 60 dB |
|---|---|
| Operating Temperature Range | -25 to +60℃,>45℃ derating °C |
| Permissible Altitude | 4000 m |
| Permissible Ambient Humidity | 0-100% |
| Operating Temperature | -25 to 65 °C |
| Max Altitude | 2,000 m |
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Read: SEC Net-Metering in Saudi Arabia: How to Apply for Rooftop Solar Approval (2026) →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.
The SUN-18K-G04-LV is specifically designed for low-voltage grids, supporting 127V/220V and 133V/230V systems.
Yes! The optional Anti-PID function helps prevent power degradation caused by Potential Induced Degradation in PV modules.