How Long Will A 3500 Watt Generator Run?

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3500 watt generators typically run for around 8 to 10 hours at 50% load on a full tank of gas.

That being said, there is no standard run time for this power category so individual generators can and often do vary a lot in this area.

If this is an important detail to you, you likely want to check the tables with 3500 watt generators and their run times below.

How long will a 3500 watt generator run on a tank of gas?

3500 watt generators will typically run for around 8 to 10 hours at 50% load on a full tank of gas.

Knowing how long a 3500 watt generator can run on a tank of gas is helpful for creating your refueling schedule and figuring out whether you can run something like an AC overnight.

However, there is not a single run time that applies to all models in this power category. Individual brands and generator designs influence this.

As a few examples demonstrate, the run times at 50% load are not necessarily half the run times at 25% load.

3500 Watt
Generator Name
Run Time
@25% Load
Run Time
@50% Load
Peak
Watts
Running
Watts
Energizer EZG350019.5 HoursNot Mentioned3500 Watts3000 Watts
Pulsar PG3500MRNot Mentioned12 Hours3500 Watts2500 Watts
ECHO EG-3500Not Mentioned10 Hours3500 Watts2800 Watts
Sportsman GEN3500DFiNot Mentioned10 Hours3500 Watts3000 Watts
Generac IQ350014.1 Hours8.9 Hours3500 Watts3000 Watts
Generac 7128 GP3500iO11 Hours8 Hours3500 Watts3000 Watts
Predator 350011 HoursNot Mentioned3500 Watts3000 Watts
GENMAX GM3500XiNot Mentioned8.5 Hours3500 Watts3200 Watts
Energizer eZV3500P15.5 HoursNot Mentioned3500 Watts3000 Watts
GENMAX GM3500iAEDNot Mentioned5 Hours3500 Watts3200 Watts
Champion 100571 350010 HoursNot Mentioned3500 Watts2300 Watts
How long 3500 watt generators run on a tank of gasoline

How long will a 3500 watt generator run on 5 gallons of gas?

3500 watt generators will typically run around 12.5 hours to 41.7 hours on 5 gallons of gas at 25% to 50% load.

Some people also have a certain amount of fuel available and want to know how long this will keep a 3500 watt generator running.

More specifically, you can find out how long machines like this can run on 5 gallons of gas (not including the time spent on refueling).

The fuel usage per hour numbers are not ideal since they are based on different loads but could be interesting nonetheless.

3500 Watt
Generator Name
Run Time
@25% Load
Run Time
@50% Load
Fuel Usage
Per Hour
Fuel Tank
Size
Energizer EZG350023.2 HoursNot Mentioned0.22 Gallons4.2 Gallons
Pulsar PG3500MRNot Mentioned15 Hours0.33 Gallons4 Gallons
ECHO EG-3500Not Mentioned12.5 Hours0.4 Gallons4 Gallons
Sportsman GEN3500DFiNot Mentioned15.6 Hours0.32 Gallons3.2 Gallons
Generac IQ350027.1 Hours17.1 Hours0.18 Gallons2.6 Gallons
Generac 7128 GP3500iO23.2 Hours16.9 Hours0.22 Gallons2.37 Gallons
Predator 350023.6 HoursNot Mentioned0.21 Gallons2.33 Gallons
GENMAX GM3500XiNot Mentioned19.3 Hours0.26 Gallons2.2 Gallons
Energizer eZV3500P39.7 HoursNot Mentioned0.13 Gallons1.95 Gallons
GENMAX GM3500iAEDNot Mentioned14.7 Hours0.34 Gallons1.7 Gallons
Champion 100571 350041.7 HoursNot Mentioned0.12 Gallons1.2 Gallons
How long 3500 watt generators will run on 5 gallons of gas

How long will a 3500 watt generator run on propane?

The two dual fuel 3500 watt generators will run around 12 hours to 21.3 hours on a 20-lb propane tank at 25% to 50% load.

The Sportsman GEN3500DFi can run for 12 hours at 50% load on a 20-lb propane (LPG) tank.

On the other hand, the GENMAX GM3500iAED can run about 21.3 hours at 25% load on a 20-lb propane (LPG) tank.

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Author:

Mats is the founder and head editor of Generator Decision. With a combination of critical thinking, tireless research, and a healthy interest in electronics he helps people find the right generators and how to use these. At this point in the journey, Mats has done research on hundreds of portable generators.