Permanent magnet three phase AC generator designed for compact, reliable low speed power generation. Uses rare earth magnets and a carbon steel main shaft to deliver efficient conversion in small scale power applications. Key specifications Size: 12V Color: 300W Rated power: 300 W or 400 W Rated voltage: 12 V, 24 V, 48 V Rated speed: 750 rpm Torque: less than 0.3 N m Conversion efficiency: at least 85 percent Net weight: 4 kg for 300 W model, 4.3 kg for 400 W model Generator type: rare earth permanent magnet three phase AC generator Main shaft material: carbon steel Why this generator matters Higher electrical conversion: Permanent magnet design eliminates excitation loss, increasing conversion efficiency and improving usable output. Compact and lightweight: Reduced size and mass make installation easier where space is limited and mounting constraints exist. Robust and low maintenance: No excitation winding, carbon brushes, or slip rings reduces wear points and increases operational reliability. Better low speed performance: Produces higher output at medium and low shaft speeds, useful for variable speed prime movers. Energy efficient operation: Lower internal losses help reduce energy waste during continuous operation. Practical applications Small wind turbines and micro hydro units where reliable low speed power generation and compact form factor are required. Off grid and mobile power systems for RVs, boats, and remote equipment using 12 V, 24 V, or 48 V systems. Small scale generators for backup power, telecom sites, and distributed generation projects that need long service intervals and consistent output at modest speeds. Package contents 1 x permanent magnet AC generator Notes on selection and installation Choose the rated voltage and power model that matches your system requirements. Ensure mounting and coupling match the carbon steel main shaft dimensions and rated speed. Expected net weight is 4 kg for the 300 W model and 4.3 kg for the 400 W model.