1. The working speed of the engine can be changed in a large range, so it can be better matched with the generator to save fuel;
2. The engine can work in the high speed range, so it outputs the same power, and the weight and volume of the engine are much smaller. In terminology, it means the power rise and the specific power are high;
3. The high working speed of the alternator also reduces the weight and volume;
4. Comprehensive 2 and 3 points, also saved a lot of metal materials;
5. The quality of the output power supply is high-pure sine wave output with very small harmonic content;
