How Long Will An 8000 Watt Generator Run?

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How long an 8000 watt generator will run influences things like whether one will last you through the night without refueling.

The main thing you need to know is that even the best 8000 watt generators can vary a lot in terms of run times.

You can say that many models around this power range run for around 11 hours at 50% load on a full tank of gas.

However, there are a lot of exceptions to this rough guideline too.

Because of this, you likely just want to take a quick look at the tables below. These include the different 8000 watt generators and their run times.

How long will a 8000 watt generator run on a tank of gas?

Knowing how long you can enjoy what a 8000 watt generator can run before refueling can be helpful for things like your schedule and whether this is the power level for you.

Unfortunately, there is not a single number of hours that applies to every 8000 watt generator. Individual models can vary a lot.

You could say these tend to have around 11 hours run time on a full tank at 50% load but there are enough exceptions to want to look at individual cases.

In simpler words, you want to check out the run times on a tank of gas of the different 8000 watt generators in the table below.

One useful thing to note is that the run time at 50% load is not necessarily half the run time at 25% load.

8000 Watt
Generator Name
Run Time
@25% Load
Run Time
@50% Load
Peak
Watts
Running
Watts
Energizer EZV800015.5 HoursNot Mentioned8000 Watts6500 Watts
RYOBI RY906500VNMNot Mentioned10 Hours8125 Watts6500 Watts
Firman P06701Not Mentioned11.5 Hours8350 Watts6700 Watts
Generac #7680 GP650016.5 Hours11.5 Hours8125 Watts6500 Watts
Champion 100430 6500 PRO12.5 HoursNot Mentioned8125 Watts6500 Watts
Champion 201169 8125Not Mentioned12 Hours8125 Watts6500 Watts
Champion 201077 8125Not Mentioned11 Hours8125 Watts6500 Watts
Champion 100719 850014 HoursNot Mentioned8500 Watts7000 Watts
Briggs & Stratton 6250 WattNot Mentioned11 Hours8500 Watts6250 Watts
DuroMax XP8500E25 Hours12 Hours8500 Watts7000 Watts
DuroMax XP8500EH25 Hours12 Hours8500 Watts7000 Watts
How long 8000 watt generators can run on a tank of gas

How long will an 8000 watt generator run on 5 gallons of gas?

It is also possible that you want to know how far an 8000 watt generator can get you with certain amounts of fuel.

The numbers are again too different to give one small general range in this area.

You can see the run the run times on 5 gallons of each of the 8000 watt generators in this article at different loads.

Keep in mind that the fuel usages are actually not the best comparison since the numbers can come from different loads.

8000 Watt
Generator Name
Run Time
@25% Load
Run Time
@50% Load
Fuel Usage
Per Hour
Fuel Tank
Size
Energizer EZV800014.1 HoursNot Mentioned0.35 Gallons5.5 Gallons
RYOBI RY906500VNMNot Mentioned8.3 Hours0.60 Gallons6 Gallons
Firman P06701Not Mentioned6.3 Hours0.70 Gallons8 Gallons
Generac #7680 GP650010.4 Hours7.3 Hours0.48 Gallons7.9 Gallons
Champion 100430 6500 PRO7.4 HoursNot Mentioned0.68 Gallons8.5 Gallons
Champion 201169 8125Not Mentioned7.1 Hours0.71 Gallons8.5 Gallons
Champion 201077 8125Not Mentioned7.1 Hours0.7
Gallons
7.7 Gallons
Champion 100719 850013.2 HoursNot Mentioned0.38 Gallons5.3 Gallons
Briggs & Stratton 6250 WattNot Mentioned7.3 Hours0.75 Gallons7.5 Gallons
DuroMax XP8500E15.8 Hours7.6 Hours0.32 Gallons7.9 Gallons
DuroMax XP8500EH15.8 Hours7.6 Hours0.32 Gallons7.9 Gallons
How long 8000 watt generators can run on 5 gallons of gas

How long does an 8000 watt generator run on propane?

Gasoline is the most popular fuel for portable generators but there are a few 8000 watt generators that can run on propane too.

This different fuel option will influence how many watts you have available and how often you have to refuel.

In the table below, you can find how long the dual fuel 8000 watt generators in the article can run on a 20-lb tank of propane.

8000 Watt
Generator Name
Run Time
@25% Load
Run Time
@50% Load
Peak
Watts
Running
Watts
Champion 201169 8125Not Mentioned6.5 Hours7500 Watts6000 Watts
Champion 201077 8125Not Mentioned6.5 Hours7325 Watts5850 Watts
DuroMax XP8500EH10 Hours4 Hours8075 Watts6650 Watts
How long dual fuel 8000 watt generators can run on a 20-lb propane 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.