Gasoline engine fuel consumption
This is the estimated ha, you do not say what you generator, your load, for a long time or a short time to use, your altitude, temperature, humidity, which are affected by the power.
Answer your question: 18KW fuel consumption if full load at around 2.5L per hour, the general load of about 2L
Your gasoline generator is a little big, usually more than 20KW diesel.
