There are several Benefits of a Portable Inverter Generator.
Use Less Fuel
In many situations they use a lot less fuel. If your power demands are changing, like an air conditioner or refridgerateor cycling on and off, then the Inverter Gen will use significantly less fuel when the demand is low.
Lighter Weight
The inverter system is usually more efficient so often the motor for the comparable wattage Inverter Generator will be smaller and the overall package will be up to 40% lighter.
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Quieter
Since Most Inverter Gens are significantly more expensive, usually the motors will be a little more gentrified and will be a bit quieter.
Smaller motors are normally used on comparable wattage inverter generators so they usually make less noise.
When the load is low the motor will be running at a lower RPM so thiis will make it quieter also.