Stable Output
Application of inverter technology ensures a stable true sine-wave output with total harmonic distortion (THD) less than 1% and voltage and frequency fluctuation less than 1%. All sensitive and microprocessor controlled equipments (computers, medical devices, and scientific research instruments) and appliances with high surge currents such as air conditioners and compressors can be run easily and safely.
Optimized Alternator
A permanent magnet alternator eliminates excitation windings, carbon brushes, and the slip rings. The structure is much simpler with the stator bolted directly to the engine. The alternator size is much smaller but it achieves a 93% alternator efficiency.  Reliability is higher, and it is free of radio interference and capable of working in high humidity and dusty environments, negating the possibility of spark ignited explosions.
Improvements
Larger muffler area means better heat dissipation. Installation position of the AC inverter module and separate cooling air into the exchanging space reduces heat as well. Meanwhile, separate air filter and air inlet areas allow more cooling air
Utilization of handles, multi-direction castors with brakes, and larger wheels makes transportation easier and safer