How Much Can a 7500-watt Generator Run

How Much Can a 7500-watt Generator Run?

If you’re here, then you’re probably wondering what a 75000watt generator is capable of, no? Well, 7500-watt generators are not only some of the most commonly used, but they’re also some of the most popular on the market. It can be used to power very many electrical devices.

The 7500-watt generators can easily get you through most power outage scenarios, as well as through natural disasters like, say, an earthquake or a hurricane. When you lose power, you definitely want more power from your generator, not less. That being said, it won’t always be easy to get the amount of fuel you need or want in those situations; however, that’s an entirely different topic altogether.

Anyway, most people are usually only worried about whether a 7500-watt generator can give power to the whole house. Besides that, the other common questions folks will ask are; whether it can power their whole RV? Can it keep the chicken coop running during power outages? Etc. All these are very important questions that should be answered clearly, and that need guidelines that’ll help you know whether this type of generator can deliver your power needs.

What Are Starting And Running Watts?

A starting watt is also commonly known as the switch-on surge. To be a little more precise, it’s an input surge current or an inrush current. It’s that instantaneous high input surge that’s emitted by an electrical device when it’s switched on. It’s usually caused by inductive power loads such as an electric motor, welder, transformer, or any other kind of power source. Even incandescent lamps and heaters demand startup surges.

The capacitors found in power supply devices are discharged when turned off. When switched on, they draw high currents from an initial low impedance. This usually only lasts for around ten milliseconds or so. However, the current emitted can go to as much as twenty times the running current or steady state. A good overall design will limit inrush surges so as to protect the equipment. It lessens the maximum current, in turn, extending the time when the current is high. This will then go on for about one or two seconds.

A running watt is the electrical power delivered by the generator when it’s been connected to passive loads such as underfloor heating, house lighting, or a resistive heater unit. As long as there’s no interference, these loads don’t change when being used. The steady power demand can be calculated easily and is a predictable one. This is basically the generator’s running watts. Anything that’s turned on and is using power from the generator will contribute to the load the generator has to handle. Even though some generator makers claim their products are 7500-Watts, it might sometimes be limited to just 29-Amps. At this limit, what it actually delivers is 29Ax240V, which equals to 6960-watts.

Can A 7500-Watt Generator Power My House?

7500-watt generators are ideal for powering the electrical devices in a household during extended power outages. Okay, they might not be able to simultaneously power all the electrical devices in the house. However, there’s a high chance that what you normally need and use in the house on a daily basis won’t need more than 7500-watts.

The main reason why many people go for the 7500-watt model over the less powerful versions is that it won’t render your heating or central air conditioning system un-operational. Depending on how big your air conditioning system is, for it to run, you’ll normally need around 3800 to 6200-watts of continuous power. Aside from that, you’ll need not less than 8000-watts of surge power as well. On the other hand, when it comes to heating units, you’ll need no less than 5000-watts, without surge wattage requirements.

These systems will most likely consume all the available power by themselves. However, being able to have them on is a big deal because it means you can have them run for a short while. Once you’ve got the temperature to where you want it to be, you can switch the systems off. If you desire continuous cooling and heating while other appliances are also on, then you might want to strongly consider switching to a window air conditioner and/or space heater and then powering those.

Across the rest of the house, the other appliances are often way more modest. The most power-hungry device most people will want on during a power outage is a freezer or refrigerator, which will need around 700 to 750-watts of running power and a surge power of about 1200-watts or so. A lot of the other common devices often use not more than 1000-watts.

  • TV: 400-watts
  • Microwave: 800-watts
  • Coffee Maker: 800-watts
  • Toaster: 850-watts
  • Dishwasher: 300-watts
  • Dryer: 300-watts
  • Laptop: 300-watts
  • Washing Machine: 500-watts (with a surge power of 1400-watts)

What else will you need in your house? Lights can consume a lot of power if many are turned on for long periods of time. An incandescent bulb will draw around 60-watts, though LED ones will lower energy use by almost 80% to between 12 to 15-watts. If you’ve got a well pump or sump pump, then you’ll have to put that in your power budget as well. Each pump uses up to around 1000-watts of running power; however, their startup requirements can go well over that to between 2200 to 3000-watts.

When all this is put together, let’s see whether a 7500-watt generator can supply your entire home with power. First, keep your lights, sump pump, and refrigerator running (which will consume around 2000-watts when they’re all up and running).

You can do the laundry (although you might not be able to have other appliances running while the dryer is on) as well as run the laptop and watch TV, all the while still consuming not more than 4000-watts. That extra energy that’s leftover can be used to run the window air conditioner or space heater (you’ve now switched to) so as to ensure your home has a comfortable temperature.

So, what we’re trying to say here is that a 7500-watt generator will power your house ALMOST as if you never lost power in the first place.


How Many Appliances Can a 7500 Watt Generator Power?

The easiest way this can be calculated is by adding up all the wattage from all the devices you’ll need operational. For instance, as we mentioned earlier, an incandescent bulb needs about 60-watts to run. This means that a 7500-watt generator will be able to give power to about 125 of these bulbs. So, to know the kind of generator you’ll need, simply make a list of all the appliances you’ll want on, collectively add their total wattage, and then compare this to the generator you’re considering. A rule of thumb that a lot of people use is that the generator you’re using shouldn’t be used for more than thirty minutes when at its highest power output.

This is largely why the rated power of the generator is often what should be used to measure the power it has. A generator’s rated power is the power it can produce when turned on for long periods of time. It’s normally around 90-percent of its maximum output. You’ll also need to keep in mind that the fuel you’ll need will be determined by the load you subject your machine to. This means that you’ll want to remember to conserve fuel if you’re in an emergency situation and have a limited supply.

For most households, if you stay away from appliances that give out electric heat, then all your necessary appliances can easily be run with this type of generator. You might not be able to power all your appliances at the same time, though. Some things might need to be unplugged for others to run; however, that depends on how much wattage they need. Also, you’ll need to always remember starting watts as well. Some appliances need more watts to get started than they do once on. So, once you’ve got the huge appliances up and running, you can switch on the other smaller ones if you have to.

Anyway, when you lose power, what you’re mostly going to want running are the lights (of course), well pump/sump pump, water heater, freezer, refrigerator, and the appliances you need to make food. Those are often the basics. Let’s take a closer look at these devices and see what they need.

Refrigerator- Most fridges will need between 130 to 200-watts to run. However, getting them up and running will take around 800 to 1300-watts. The numbers will be almost the same if you’ve got a separate freezer.

Water Heater- Electric water heaters will use around 1100 to 4500-watts, though that’ll depend on whether it’s a 120 volts or 240 volts system. Oh, and that’s just running wattage. Natural gas water heaters have a starting wattage of around 1500-watts and a running wattage of about 500-watts or so.

Furnace- Typical home gas furnaces have a starting wattage of around 500 to 2500-watts. Their running wattage is around 350 to 950-watts, depending on the unit’s horsepower. Electric heat furnaces have a running wattage of between 11000 to 50000-watts, depending on how big they are.

Electric Oven- Typical modern electric oven consumes around 1000 to 5000-watts.

Well Pump- Most well pumps only require around 200-watts to run. But, you’ll need a lot more than that to get them started. In fact, it might even take ten times that amount during startup. The average pump will need a starting wattage of between 1800 to 2200-watts.

When determining what you need during a power outage, think about what you need rather than what you want. You need a warm living space, water, and food. Yes, you probably want to watch reruns of Game of Thrones; however, that’s something you want and not need. 

A 7500-watt generator will allow you to run most small household devices and a few large ones. Figure out what you need the most during emergencies and power those devices and comforts accordingly. A 7500-watt generator, in general, should be able to comfortably get you through any emergency that involves loss of power. Okay, the truth is, you shouldn’t expect to live exactly like you would when you had normal power, but you can live comfortably. Just know you’ll still have to make a few sacrifices.

How to Choose a 7500-Watt Generator

Not every 7500-watt system will be right for you. There are certain things that’ll make some right for one person but not ideal for another. This is why we want you to consider a few things before getting one. Let’s take a look at the things you should consider before buying this kind of generator.

Rated Power and Surge Output

What’s the generator’s running and starting watts like? Determine how much it’ll take to both start it up as well as run it. The starting watt is what the generator will need to start up your motor driven devices. The running watt is what the generator will need to provide continuous power. Never forget about starting power. Get a generator that’ll give you more than what the estimation provides.

Generator Type

You can purchase a conventional or inverter, dual-fuel, or single-fuel 7500-watt generator. These are specific sections of the generator’s categorization, and the last ones are up to what you prefer. An inverter model will provide power easily, silently, and portably. Although they often cost way more than their conventional counterparts. That being said, the traditional generator might be a little more reliable because of its open-frame, air-cooling design, which allows for long periods of use.

You can move on to the fuel type once you’ve chosen between an inverter and conventional. The options are generally between single-fuel and dual-fuel. The choice will largely depend on fuel convenience and your budget. Single-fuel generators will either run on propane or gasoline. Dual-fuel can use any of the two. That’ll allow you to pick the most convenient fuel for you.


The 7500-watt generators don’t come cheap. In fact, you’ll probably have to break the bank a little to get one. You need to make sure you’re getting your hands on a heavy-duty device that has a long lifespan if you want to get back reliable service. Look at how it’s been built and ensure you’re getting something that’s durable enough to handle all your needs. Good generators usually have a metallic and very sturdy overall design. The engine on it also has to be well-protected from extreme weather conditions. A stainless steel sleeve or powder-coated cast iron plate should ensure this.

Mobility and Portability

If you want to get a versatile 7500-watt generator for your recreational needs, which means you might have to transport it a lot from one place to the other, then you’ll want a portable and movable model. Make sure it has been well manufactured so that it can handle all the moving you intend to put it through. Also, get one that’s hassle-free when being carried. Consider getting a generator with a handle and all-terrain wheels. If you want something that can be easily lifted, get one with a sturdy metallic frame or a lifting hook.


The unit’s runtime is also a very important factor, especially during a power outage where you’re not really sure when you’ll get power back. Top quality 7500-watt generators should provide the user with ample time to run all the devices they want to run, as well as also prevent them from waking up from their beds at night to go refuel it. Yes, most generators can be refueled even while still on; however, if you get one with good run time then you won’t have to worry about getting interrupted all the time. The ideal generator should have like a nine-hour runtime.

Starting System

Most 7500 watt generators have electric start systems that come with either only a recoil start or with a recoil backup. The best ones have both these features on them. Getting one that has a combination of the two means that it can be started with either the switch or electronic key. For effortless starting, some generators may also include the use of Cold Start technology. This makes it easier to start during the cold seasons. Also, some of them might have choke properties as well so as to provide you with a more relaxed start.

The Number of Outlets Available

Besides attaching the generator to the house’s backup system, some appliances and applications might need a direct connection to the generator itself. This is usually so that they can eliminate the need for an extension cord, which, in turn, helps increase the resistance factor. So, since this type of generator is often very big in size, you might as well get one that has multiple outlets.


Noise is another thing you really need to strongly consider, especially because most 7500-watt generators are usually pretty noisy. If you’re looking for an industrial or job site generator, then this isn’t something you need to worry about too much. However, if you’re in search of a recreational or home backup generator, then you need one that doesn’t make too much noise. The noise measurements for this kind of generator usually range between 55dBA to 76dBA.


You’ve finally decided on what model you want to buy, however, does the option you’ve picked have a warranty? Getting one that has a warranty guarantee will ensure your investment is protected in case the machine fails because of a manufacturing error. Furthermore, a guarantee shows how trustworthy the brand manufacturer is when it comes to producing top-quality units. A two-year warranty policy is the least you should be looking for ideally. Also, find time to read a few customer reviews so that you can have an idea of how reliable the warranty follow-up is.

Generator Safety

Now that you’ve gotten the generator you wanted, it’s time to learn how to use it safely. For starters, you’ll need a transfer switch installed. Generator transfer switches will protect “back feeding” of power onto the lines. When the generator’s power back feeds, the current is transferred back into the lines, which could severely harm or even kill the emergency crew members working hard to restore power.

Hire an experienced technician to help you install the transfer switch onto your generator. Furthermore, never plug the generator directly into your house’s outlets. Not only can this give rise to back feeding as well, but it can also potentially cause a fire and ruin your wiring. Also, avoid running the generator inside your garage. However, you can if you’ve got proper ventilation inside. If your garage has a good overall design, with all safety standards being met, then all is possible.

When the generator has been connected safely to the home, plug in the large appliances first before anything else. Once those or on, then you can start switching on the lights and plugging in other smaller household appliances. Don’t forget to do the math we mentioned earlier so as not to overload the generator. Oh, and you’ll also need to make sure you have all the correct extension cables. Three-prong extension cables are ideal for the larger appliances in the house. When you’re using a generator of this kind, ensure you store it in a dry area away from snow, rain, and other wet weather.


7500-watt generators are ideal for those of you that are looking to power the basic household appliances during a blackout. However, to make sure it’s something that can help during emergencies, take inventory of everything you just can’t live without.

And, there you have it; everything one needs to be able to get their hands on their ideal 7500-watt generator. However, you shouldn’t be surprised if you find yourself picking a more powerful and stronger model than you initially anticipated. That happens quite a lot. Everything in this article is here to help make the purchasing process a little easier for you. So, now that you know what it can do and what to look for go get yours today!