How Long Will A 4500 Watt Generator Run?

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4500 watt generators will run around 10 hours to 25 hours on a full tank of gasoline. 4500 watt propane generators tend to run around 19 to 22 hours at 25% load and around 9 to 11 hours at 50% load on 20 lb of propane.

Keep in mind that different 4500 watt generators can vary a lot in terms of how long they will run. Especially if you include dual fuel options.

As you can see from the gasoline 4500 watt generator ranges, the actual numbers vary a lot. That means you want to check out the different models in the first table below.

How long will a 4500 watt generator run on a tank of gas?

4500 watt generators will run around 10 hours to 25 hours on a tank of gas. Individual models can vary a lot so you want to check the table below.

4500 Watt
Generator Name
Run Time
@25% Load
Run Time
@50% Load
Fuel
Tank Size
Peak/Starting
Watts
Continuous
Watts
Dewalt DXGN4500Not Mentioned15 Hours7 Gallons4500 Watts4200 Watts
Firman H03651Not Mentioned14 Hours5 Gallons4550 Watts3650 Watts
WEN GN4500Not Mentioned13 Hours4 Gallons4500 Watts3600 Watts
WEN DG4500iXNot Mentioned12 Hours4 Gallons4500 Watts3650 Watts
Pulsar PG4500iSRNot Mentioned11 Hours3.2 Gallons4500 Watts3700 Watts
A-iPower SUA4500Not Mentioned11 Hours4 Gallons4500 Watts3500 Watts
Powerhorse 4500Not Mentioned10.6 Hours3.9 Gallons4500 Watts3600 Watts
DuroMax XP4500DX25 Hours10 Hours4 Gallons4500 Watts3500 Watts
Ryobi RY903622Not Mentioned10 Hours6 Gallons4500 Watts3600 Watts
Firman W03661OF22 HoursNot Mentioned6 Gallons4500 Watts3650 Watts
Powermate PM450019 HoursNot Mentioned5 Gallons4500 Watts3600 Watts
Generac 7677 GP3600Not Mentioned9.3 Hours3.7 Gallons4500 Watts3600 Watts
Westinghouse iGen450018 HoursNot Mentioned3.4 Gallons4500 Watts3700 Watts
Cummins Onan P4500i18 HoursNot Mentioned3.4 Gallons4500 Watts3700 Watts
Champion 201054 450017 HoursNot Mentioned2.9 Gallons4500 Watts3650 Watts
WEN 56455iNot Mentioned8.5 Hours2.2 Gallons4500 Watts3500 Watts
DuroMax XP4500iH16 Hours8 Hours2.64 Gallons4500 Watts3600 Watts
Briggs & Stratton P450016 HoursNot Mentioned3.5 Gallons4500 Watts3700 Watts
Yamaha EF4500iSE15.2 HoursNot Mentioned4.5 Gallons4500 Watts4000 Watts
Champion 200986 450014 HoursNot Mentioned2.3 Gallons4500 Watts3500 Watts
Powerhorse LC4500i10 HoursNot Mentioned2.6 Gallons4500 Watts3500 Watts
How long 4500 watt generators run on a tank of gas

There is not really a single standard for how long a 4500 watt generator can run on a tank of gas.

In simpler words, different 4500 watt generator brand models can vary a lot in terms of run time as you can see in the table below.

How long will a 4500 watt generator run on propane?

4500 watt propane generators tend to run around 19 to 22 hours at 25% load and around 9 to 11 hours at 50% load on 20 lb of propane.

Individual models can again vary a lot so the detailed table below tends to be helpful.

4500 Watt
Generator Name
Run Time
@25% Load
Run Time
@50% Load
Fuel
Tank Size
Peak/Starting
Watts
Continuous
Watts
WEN DG4500iXNot Mentioned12 HoursYour Own
20-lb
Propane Tank
4500 Watts3285 Watts
Champion 200988 4500 DF22.1 HoursNot MentionedYour Own
20-lb
Propane Tank
4500 Watts3150 Watts
Westinghouse iGen4500DF22 HoursNot MentionedNot Mentioned4050 Watts3330 Watts
Champion 200978 4500 DF21 HoursNot MentionedYour Own
20-lb
Propane Tank
4500 Watts3650 Watts
PULSAR PG4500BISRCONot Mentioned11 HoursYour Own
20-lb
Propane Tank
3700 Watts3330 Watts
DuroMax XP4500DX20 Hours9 HoursYour Own
20-lb
Propane Tank
4275 Watts3325 Watts
WEN DF452iXNot Mentioned9 HoursYour Own
20-lb
Propane Tank
4500 Watts3150 Watts
DuroMax XP4500iH19 Hours11 HoursYour Own
20-lb
Propane Tank
4275 Watts3420 Watts
Firman WH03661OFLikely 18 HoursNot MentionedNot Mentioned4500 Watts3650 Watts
Powermate PM4500DF14 HoursNot MentionedNot Mentioned4180 Watts3240 Watts
How long 4500 watt generators run on propane

4500 starting watts is a power capacity range where generator brands also offer a decent number of dual fuel options that can also run on propane.

In the cases where there was a single-fuel version with similar run times, I did not add the dual-fuel version in the table above.

At the same time, some models do appear in both tables.

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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.