The runtime of a Honda EU3000iS generator, or any generator for that matter, can vary based on several factors such as the load (how much power is being drawn), altitude, and weather conditions.
The Honda EU3000iS generator has a fuel tank capacity of approximately 3.4 gallons (12.8 liters). On a full tank of gas, at rated load (the maximum amount of power the generator can continuously produce), it can run for about 7.2 hours.
In some cases, the generator can run for up to 20 hours or more on a full tank, depending on the load.
It's important to note that these figures are approximate and can vary depending on the specific conditions and circumstances of use. Additionally, it's always a good idea to consult the owner's manual or contact the manufacturer for the most accurate and up-to-date information regarding the runtime of your specific generator model.