... to 15 years, Maintenance- freeLight Weight, Easy to InstallHeavy Wind Resistance, Low NoiseAnti-Rust, Anti-CorrosionDamp-Proof, Water-Proof, ... rotorNet Weight22KGTower ConnectionFlange connectionController TypeMPPT or PWMApplicationsStand alone, solar & wind hybrid system etc.Lifespan(years)15Warranty (years)3Years on ... ISO9001:2000, CE, ROHS, ETL low start up wind speed 5 blades 400W wind generator