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The best way to reduce the operating cost of a generator is to reduce the size. You want to run up the load curve as much as you can. Part load is inefficient.
The best way to reduce the generator size is to use soft starters on the air conditioners and any motors, to reduce in-rush current.
I have two large air conditioners (4 ton and 3.5 ton). I only have a 16 kW generator. It will start and run both because of the soft starts. A soft starter allowed an 8kW unit to start/run a 3 ton air conditioner.
Get the smallest unit you can so that you will do what you need. This will minimize fuel consumption.
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James
The pessimist complains about the wind; the optimist expects it to change; the engineer adjusts the sails.- William Arthur Ward (1921-1994)
Red-beard for President, 2020
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