98.6% Efficiency
Maximum energy conversion

18-21kW three phase LV string inverter with 98.6% efficiency for 127V/220V grids.
The Deye SUN-18-21K-G04-LV is a high-performance three-phase string inverter for residential and commercial solar installations. With 18-21kW 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.




Learn how to configure battery banks in series and parallel for solar systems. Match voltage, increase capacity, and avoid common wiring mistakes.
Read: Battery Bank Configuration — Series vs Parallel →Compare Deye LV batteries (BOS-A, SE-F5) with HV options (GB-L Pro, BOS-G). Learn when to use each type, how to size your system, and which fits your UAE solar installation.
Read: How to Choose Between Deye Low-Voltage and High-Voltage Batteries →A detailed review of the Deye SUN-8K hybrid inverter and how it performs in the extreme heat of the UAE. Discover grid-tie features, battery compatibility, and real-world efficiency.
Read: Deye Hybrid Inverter Review: SUN-8K for UAE Climate →The SUN-18-21K-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.