Which Generator gets the Best Use of Fuel?

If you are using a generator at between 60% and 70% of it's capacity almost all the time then a conventional generator would probably get nearly as good of fuel usage as an Inverter Generator.

Steady Stage Generator Usage

If you can arrange your electrical load so it is not varying much then good Conventional Gensets can work well.

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Variable Load Generator Usage

If your use has changing loads with significant time running without much load then the Inverter Generator will get much better fuel economy. The engine will run at a lower rpm when the load is dropped with an Inverter. An Air Conditioner going on and off, a fridge going on and off, any equipment that cycles on and off will

With Conventional Gensets the RPM must always stay constant to keep the standard 60 cycles per second AC power.