R5-3~8K-S2 is a single-phase on-grid solar inverter of two MPPT. It is designed for residential solar system in rooftop PV sector, helping customers enjoy solar energy comfortably and efficiently. High efficiency and reliability of this inverter guarantee a better user experience. Adopting a die-casting casing design, R5-3~8K-S2 gives better heat dissipating performance. Its maximum efficiency reaches 98.3%. R5-3~8K-S2inverter is also featured with 1.1 times overload(except for R5-6K-S2 and R5-8K-S2) and 1.5 times of DC input, which increase power generation of the solar system. A without-external-fan design keeps this inverter operating in a low noise level, providing a comfortable user experience.