What Can a 7500-Watt Generator Run? – [Will It Fits My Needs]

This article aims to answer your questions about “what can a 7500-watt generator run?” How many appliances we can run simultaneously and will it fill my needs?

A 7,500-watt machine could run almost every essential of household, RV, or Job Site Including the RV/Window AC, Microwave, Refrigerator/Freezer, Electric Stove, Space Heater, Oven, Water heater, Washing Machine, Dryer, etc.

What Can a 7500-Watt Generator Run?

What Appliances Will a 7500 Watt Generator Run?

A 7,500-watt machine could run the following appliances of Household, Rv, or Job Site.

What Household Appliances Can I Run?

ApplianceRunning WattsStarting Watts
Microwave Oven 1000 W10000
Furnace Fan 1/3 HP7001400
Sump Pump 1/3 HP8001300
Light Bulb 60 W600
Electric Water Heater 4 kW40000
Window AC 12.000 BTU15002300
Deep Freezer5001500
Curling Iron15000
Central AC 40.000 BTU60007500
Light LED Bulb 10 W100
Toaster Oven12000
Food Processor4000
Furnace Fan 1/2 HP8002350
Sump Pump 1/2 HP10502200
Garade Door Opener 1/2 HP9002400
Electric Grill 1.6 kW16000
Ceiling Fan100300
Window AC 5.000 BTU600900
Vacuum Cleaner 12 Amps14402500
Window AC 15.000 BTU19002900
Iron (Clothes)15000
Clothes Dryer – Electric50007000
Microwave Oven 600 W6000
Central AC 10.000 BTU15002400
Window AC 12.000 BTU15002300
Humidifier 13 gal.1750
Iron (Waffles)12000
Hair Dryer 1.5 kW15000
Box Fan 20″200350
Coffee Maker10000
Well Pump 1/2 HP10002100
Electric Stove 2kW20000
Security System5000

What RV Appliances Can I Run?

ApplianceRunning WattageStarting Watts
Electric Water Heater 4 kW40000
Clothes Dryer – Electric50007000
Deep Freezer5001500
RV Air Conditioner 7,000 BTU9001700
Microwave Oven 1000 W10000
Ceiling Fan100300
Electric Grill 1.6 kW16000
Television 27″5000
Light Bulb 60 W600
Light Bulb 75 W750
Light LED Bulb 10 W100
Curling Iron15000
Iron (Clothes)15000
Food Processor4000
Space Heater 2 kW20000
Electric Stove 2kW20000
Furnace Fan 1/3 HP7001400
Furnace Fan 1/2 HP8002350
Washing Machine12002300
Vacuum Cleaner 12 Amps14402500
Coffee Maker10000
RV Air Conditioner 10,000 BTU12002000
RV Air Conditioner 13,500 BTU16002500
RV Air Conditioner 15,000 BTU17002700

What Jobsite Tools Can I Run?

ApplianceRunning WattageStarting Watts
Halogen Work Light 300 W3000
Electric Drill 1/2 inch 5.4 Amps600900
Air Compressor 1/4 HP9001600
Reciprocating Saw9001300
Belt Sander12002400
Hammer Drill 1.2 kW12003500
Circular Saw 7 1/4 inch14002300
Miter Saw 10 inch18002500
Planer/Jointer 6 inch18002500
Airless Sprayer6001200
Electric Drill 3/8 inch 4 Amps450700
Halogen Work Light 1 kW10000
Halogen Work Light 500 W5000
Table Saw 10 inch20002800
Air Compressor 1 HP16004500

Recommended Guide: What appliances can a 12000-watt generator run?

Can a 7500W Generator Power Your Entire House?

It depends on the requirements; typically a 7500w generator would be more than enough to operate some of the standard appliances and tools like microwaves, refrigerators, window/RV air conditioners, sump pumps, air compressors, circular saws, electric drills, security systems, etc.

We recommend doing the manual power calculation before making any buying decision. Power calculation will not only provide you with a rough idea about the wattage needs of the household or RV but also save your ongoing cost of maintenance, fuel, and costly repairs.

How Many Appliances Can I Run Simultaneously?

It depends, if you are going to operate some of the standard wattage appliances like fans, microwaves, refrigerators, lights, LCDs, etc. you can run 10 – 12 simultaneously, however, if you have already plugged in a power-hungry appliance of 6,000 – 7,000 watts, you will have access to plug in another.

NOTE: You don’t have to overload your generator at any cost, however within the limits of 0 – 7,500 watts you can plug any appliance/equipment you want.

Check out the guide about fixing an overloaded generator.

How Can I Determine My Power Needs?

  • List down the appliances/tools of your household/RV or job site with their starting and running wattages. You can find the power ratings from the energy labeling of a particular appliance.
  • If you have found the power ratings in amps, make sure to convert them into the wattages with the help of Ohm’s law.

Ohm’s Law: W (watts X kilowatts) = Amps (amperes) X V (Voltages)

e.g.: An appliance consumes about 10 running and 15 starting amps at the voltage of 220V.

With the help of Ohm’s Law

W (watts X kilowatts) = Amps (amperes) X V (Voltages)

Running watts: 10 x 220 = 2200 watts

Starting Watts: 15×220 = 3300 watts

  • Sum up the starting and running wattages of the appliances also make sure to keep them in a separate column.
  • Compare the sum of wattages with a machine you are going to own.

Practical Example:

AppliancesStarting WattsRunning Watts
Refrigerator1200 Watts200 Watts
Dishwasher1500 Watts1500 Watts
Deep Freezer1300 Watts700 Watts
Washing Machine0 Watts1200 Watts
Vacuum Cleaner 12 Amps25001440
Microwave0 Watts800 Watts
TOTAL6,500 Watts5,840 Watts

From the above calculations we got 6,500 starting and 5,840 running watts, hence a solid machine of 7.5kw would be enough for this quotation.

Recommended Read: What Can a 6500 Watt Generator Run?

NOTE: Keep a margin of 10 – 20% of the load so that the machine can run smoothly with decent efficiency.

Pulling the 100% load from a machine would not only overload the generator but also the flow of voltages, and as a result, you may have contaminated power with unstable voltages.

Recommended Guide: How to clean up the generator’s power?

What Size Breaker Do I Need for a 7500 Watt Generator?

30amp breakers would work like a charm for a 7,500-watt generator; however, for a machine with more than 9,000 watts, you should consider a 50-amp breaker.

Will a 7500-watt Generator Run My Air Conditioner?

A window or RV air-conditioner wouldn’t be a problem for a 7500-watt machine, however, if you own a central air conditioner unit with more than 40,000 BTUs you may have to consider a bigger generator of at least 12 – 15Kw.

Below are the air conditioners with different BTU and Wattage ratings that can run smoothly with a 7.5k unit.

  • Window air conditioner of 5,000 – 18,000 BTUs (650 – 2250 Watts).
  • RV air conditioner of 5,000 – 20,000 BTUs (500 – 3000Watts).
  • A central air conditioner with 1450 – 6,000 running and 2,000 – 7000 starting Watts.

How Long Will a 7500-Watt Generator Run?

It depends on the fuel tank site, the efficiency of the generator, and how much power you are pulling from the machine. Typically a solid 7,500-watt machine like Champion 7500 provides at least 10 hours of runtime with a single tank of 5.5 – 6 gallons at 25% (1/4) load.

Will a 7500 Watt Generator Run a Furnace?

A standard household or RV furnace will not be a big problem for a 7.5kw machine since they typically consume about 600 – 3,000 depending on the size and model, however, if you are going to operate a huge furnace of 10,000 – 20,000 wattage you may have to consider a bigger machine of 15 – 24k.

Here is the Guide about what size generator I need to run a furnace.

How Many Amps Does a 7500 Watts Generator Provide?

Below are the readings we have got at the different voltages.

At 240 volts31.25 amps
At 220 volts34.09 amps
At 120 volts62.5 amps

NOTE: The above conversion has been made with the help of ohm’s law: W (watts) = V (volts) X Amps (amperes)


Though a 7500-watt generator would be enough for a small household, Class “B” or “C” RV, or a job site, still we recommend doing the wattage calculation to make sure that you will have a machine that not only fills your needs but also cut down the initial and future cost of fuel and maintenance.

FAQs – Frequently Asked Questions

How Long Will a 7500 Watt Generator Run on a Gallon of Gas?

It depends on the load you are pulling, however, a decent generator should provide at least 1.5 hours of runtime at 25% – 30% load.

How Long Will a 7500 Watt Generator Run On 5 Gallons of Propane?

A 7500w generator can provide about 5 – 5.5 hours of runtime with 5 gallons of propane.

How Many Things Can You Run on a 7500-Watt Generator?

It is a lengthy process to calculate how many appliances a 7,500-watt machine can run, however, you can run anything within the 0 – 7,500-watt range. I have included a section in this article that explains which appliances can be run simultaneously, please have a look.



Kashif has been a valuable asset to the electric generator industry for over 5 years. Now, As a skilled energy engineer, he’s been on the front lines of diagnosing problems, fixing broken parts, and performing routine maintenance tasks to keep generators running smoothly.

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