KAISAI single-phase photovoltaic inverters are a series of devices with the highest technical parameters, providing efficient and quiet operation in all operating conditions. Flexible installation, compact size, aesthetic, and lightweight design allow for universal use in residential and commercial projects. State-of-the-art technology meets the high demands of the PV market, very low starting voltage allows the inverter to start working at low solar intensity, and high input power robustness allows PV panel expansion without changing the inverter. KAISAI inverters are characterized by high European efficiency with a small difference between it and the maximum efficiency of the device of less than 1%. Additional advantages are small size and weight with high performance, full certification and 10-year warranty for the product.