A 200 amp service is a lot of power. That’s why it’s extremely important to make sure you have the appropriate size generator before taking on such an installation.
In this article, we’ll give you some guidance on what size generator you need for a 200 amp service and how to get the most out of your installation.
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What Size Generator Do I Need For 200 Amp Service?Â
For 200 amp service, a generator with a capacity of 15-20kw is typically suitable, ensuring sufficient power for most homes. This capacity accommodates most essential appliances and household needs during an outage.
| Size | Running Watts | Recommended Generator |
|---|---|---|
| Minimum | 12000 | Champion 12000 Running Watts Generator |
| Medium | 15000 | Generac 15000 Running Watts Generator |
| Maximum | 20000 | Generac Home 19.5kW Air Cooled Standby Generator |
We made a chart for 200 amp service generators based on major appliance uses:
| Major Appliances | Running Watts | Recommended Generator |
|---|---|---|
| 10,000 BTU AC, Refrigerator – 24 Cu. Ft. (with Freezer), TV – 42″ Plasma, Microwave, Coffee Maker, Food Processor, Electric Stove – 8″, Furnace – 1/2 HP Fan, Toaster, Washing Machine, Steam Iron, Laser Printer, Electric Space Heater – 5100 BTU, Sump Pump – 1/3 HP, Garage Door – 1/2 HP. | 12000 | Champion 12000 Running Watts Generator |
| 10,000 BTU AC, Refrigerator – 24 Cu. Ft. (with Freezer), TV – 42″ Plasma, Microwave, Coffee Maker, Food Processor, Electric Stove – 8″, Furnace – 1/2 HP Fan, Toaster, Washing Machine, Steam Iron, Laser Printer, Electric Space Heater – 5100 BTU, Sump Pump – 1/3 HP, Garage Door – 1/2 HP, Steam Iron, Hair Dryer. | 15000 | Generac GP15000E 15000 Running Watts/22500 Starting Watts Generator |
| 21,000 BTU AC, Refrigerator – 24 Cu. Ft. (with Freezer), TV – 42″ Plasma, Microwave, Coffee Maker, Food Processor, Electric Stove – 8″, Furnace – 1/2 HP Fan, Toaster, Washing Machine, Steam Iron, Laser Printer, Electric Space Heater – 5100 BTU, Sump Pump – 1/3 HP, Garage Door – 1/2 HP, Steam Iron. | 17000 | Generac 7077 Guardian Series 20kW/17kW Air Cooled Standby Generator |
| 30,000 BTU AC, Refrigerator – 24 Cu. Ft. (with Freezer), TV – 42″ Plasma, Microwave, Coffee Maker, Food Processor, Electric Stove – 8″, Furnace – 1/2 HP Fan, Toaster, Washing Machine, Steam Iron, Laser Printer, Electric Space Heater – 5100 BTU, Sump Pump – 1/3 HP, Garage Door – 1/2 HP, Steam Iron, Hair Dryer, Laser Printer, Garage Door. | 19500 | Generac Home 22kW/19.5kW Air Cooled Standby Generator |
Various Generator Options for 200 Amp Service
The most common types of generators are gasoline, diesel, propane, and dual fuel.
Gasoline Generators
Gasoline generators are the most common and affordable type of generators. They are easy to start and operate, and they can run on regular unleaded gasoline that you can find at any gas station.
Gasoline generators also have some drawbacks. They are noisy, produce a lot of exhaust emissions, and require frequent refueling and maintenance.
Gasoline is also highly flammable and can be dangerous to store and transport. Gasoline generators have a fuel consumption rate of 0.75 gallons per hour (GPH) per kilowatt (kW) of power.
Diesel Generators
Diesel generators are more powerful and efficient than gasoline generators. They can run longer on a single tank of fuel, and they produce less noise and emissions.
Diesel is also safer to store and transport than gasoline, as it is less flammable and volatile. Diesel generators are also more expensive and heavier than gasoline generators.
They require a special type of fuel that may not be readily available in some areas, especially during emergencies. Diesel generators typically have a fuel consumption rate of 0.5 GPH per kW of power.
Propane Generators
Propane generators are another option for 200 amp service. Propane is a clean-burning fuel that produces less noise and emissions than gasoline or diesel.
Propane is also easy to store and transport, as it comes in pressurized tanks that can last for years without degrading. Propane generators are also more costly and less powerful than gasoline or diesel generators.
It is also affected by temperature changes, which can reduce its efficiency and performance. Propane generators have a fuel consumption rate of 1 GPH per kW of power.
Dual Fuel Generators
Dual fuel generators are the most versatile type of generators. They can run on either gasoline or propane, depending on your preference and availability.
This gives you more flexibility and convenience, as you can switch between fuels as needed. The versatility of dual fuel generators makes them more environmentally friendly than single fuel generators.
It is also more complicated and expensive to operate a dual fuel generator. Because they have two separate fuel systems, they require more maintenance and care.
The fuel consumption rate for a dual fuel generator is 0.75 GPH for gasoline and 1 GPH for propane.
Key Factors Influencing Generator Size Selection for 200 Amp Service
The generator size you select for 200 amp service depends on factors other than appliance wattage. These factors include:
Fuel Type and Availability:
As we mentioned earlier, different types of generators use different types of fuel, such as gasoline, diesel, propane, or a combination of them.
Each type of fuel has its own advantages and disadvantages, depending on factors such as cost, availability, performance, maintenance, and environmental impact.
You need to consider which type of fuel is best for your situation and budget, and how much of it you can store and access during an emergency.
Duration of Power Outage:
The longer you need to run your generator, the more fuel you will consume and the more maintenance you will require.
Consider how long you will be without grid power, and how often you can refuel and service your generator.
Consider your generator’s fuel efficiency, which is how much power it can produce per unit of fuel. A more fuel-efficient generator can run for longer periods of time with less fuel.
Generator Placement and Installation Space:
The location and size of your generator can affect its performance and safety. Your generator location, size, and proximity to your home and neighbors should be considered.
You also need to consider the ventilation, wiring, grounding, and noise level of your generator. Follow the manufacturer’s instructions and local codes when installing generators.
Budget and Economic Considerations:
The cost of your generator can vary depending on its size, type, features, quality, and brand. Your generator should be priced according to your budget, and its value must be considered.
You also need to consider the operating costs of your generator, such as fuel, maintenance, repairs, and replacement parts.
You need to compare the costs and benefits of different generator options before making a decision.
Environmental Impact:
The environmental impact of your generator can depend on its type, size, fuel, emissions, noise level, and waste disposal.
Take into account how your generator will affect air, water, soil, wildlife habitat, climate change, and human health.
You also need to consider how you will dispose of your used fuel, oil, filters, batteries, and other waste materials from your generator.
You need to choose a generator that minimizes its environmental impact as much as possible.
Noise Level and Neighborhood Restrictions:
Generator noise levels can differ based on their type, size, design, mufflers, load level, and proximity to neighbors and homes.
You need to consider how loud your generator will be when it is running, and how it will affect your comfort and peace of mind.
You also need to consider the noise regulations and restrictions in your neighborhood or community.
You need to choose a generator that meets the noise standards and expectations in your area.
>> What generator size to power 5 ton ac?
Best Generator For 200 AMP Services
1. Champion Power Equipment 15,000/12,000-Watt Portable Generator with Electric Start and Lift Hook
The Champion Power Equipment 100111 15,000/12,000-Watt Portable Generator is a great product for those wanting to bring the power of their house with them.
This generator provides an amazing amount of watts that can be used up at home or on the go.
With no need for fuel oil, this generator will take care of everything you need.
This Champion Power Equipment Portable Generator features a gas powered engine that runs smoothly and quietly for hours at a time.
With a weight of 330 pounds, this generator is light enough to move around with ease.
This product also features an intelligent gauge that lets you monitor voltage, hertz and run-time hours so your power needs are met on the go or at home.
The Champion Power Generator includes four 120V 20A GFCI outlets that are protected by a safety system.
In addition, this product features two regular and one locking 220v 30 amp outlets for those with larger needs.
This Portable Generator also includes an easy access side door to the fuel tank reservoir. This allows for quick and easy refueling.
The Champion Power Equipment 100111 Generator is a great product that offers more than enough power for those who may need it on the go or at home.
The generator features nine hours of run time when used with an empty tank which provides plenty in an emergency.
This Generator is great for those who need a lot of power and with its three year limited warranty, you are guaranteed to get your money’s worth!
2. Generac GP15000E 15000 Running Watts/22500 Starting Watts Electric Start Gas Powered Portable Generator
The Generac GP15000E Gas Powered Portable Generator is a powerhouse for the heavy-duty power needs of today’s homeowners.
This generator is capable of supplying up to 22500 starting watts and 15000 running watts. Perfect for disaster preparedness in your home.
This Generator features a heavy-duty steel frame and 16 gallon fuel tank for up to ten hours of run time at 50% load, as well as an idle control that reduces noise and conserves fuel.
The generator is equipped with 120 volts and has two 3000 watt outlets (one L14-30R twist-lock and one L14-30P plug), which are capable of handling all your household needs.
The generator is engineered with a low oil-level shutdown and hour meter to ensure your peace of mind.
Included are two 12V outlets, one 120 volt outlet (L14-30R twist lock) and four heavy duty rubber feet for ultimate stability on the Jobsite or in other demanding environments.
The Generac GP15000E Gas Powered Portable Generator is backed by a two-year warranty on parts and labor as well as an additional year of protection against power outages so you can be confident in this purchase.
It has a 992cc OHVI engine that provides plenty of power for the toughest job sites.
This generator is also equipped with an electric start, so you can get back to work as soon as possible without wasting precious time cranking a hand crank.
3. Generac 7077 Guardian Series 20kW/17kW Air Cooled Standby Generator with Aluminum Enclosure – 3 phase
The Generac Guardian Series is the perfect generator for any homeowner.
This series provides 20kW and 17kW models that are capable of powering an average home with 200 amp service during a blackout or power outage.
As well as provide emergency backup when camping, boating, hunting or using other recreational vehicles.
The Guardian Series is equipped with a variety of features that will make your time without power as smooth and comfortable as possible, while also helping to extend the lifetime of sensitive electronics.
The Generac 7077 guardian series comes in a 20kW/17kW Air Cooled Standby Generator for 200 amp service.
The generator has an automatic transfer switch (Sold Separately) and has a tough, durable all-weather aluminum enclosure with removable sides for easy access.
It includes Generac’s ‘TruePower Technology’ which delivers best in class power quality while delivering smoother operation of sensitive electronics and appliances.
The generator also offers a variety of useful features that can be easily controlled via the Generac evolution controller.
The features include generator status, utility power presence or maintenance required which are all visible on LED indicators.
Pros: This series offers two sizes of generators that can handle most households’ needs with 200 amp service and provides emergency backup when camping, boating, hunting or using other recreational vehicles.
The generator is also equipped with a variety of features that will make your time without power as smooth and comfortable as possible, while also helping to extend the lifetime of sensitive electronics.
Cons: Some customers have noted an issue where generators won’t start when they are hot. These units should not be started until they have cooled down for a few hours.
4. Generac 7043 Home Standby Generator 22kW/19.5kW Air Cooled with Whole House 200 Amp Transfer Switch, Aluminum
The Generac 7043 Home Standby Generator 22kW/19.50kW Air Cooled is the perfect power backup for your home or office, and it includes all of the features you want in a generator!
It has a powerful engine that provides smooth operation and less than five percent total harmonic distortion (THD), which means this unit operates smoothly while powering sensitive electronics and appliances.
This generator also includes a durable, all-weather aluminum enclosure that provides three removable sides for convenient service access.
The Generac evolution controller features LED indicators for generator status, utility power presence or maintenance required.
It has a 200 amp NEMA (indoor/ outdoor rated) whole house smart transfer switch that can be mounted indoors or outdoors.
If you’re looking for a generator to use during an extended power outage, the Generac Home Standby Generator 22kW/19.50kW Air Cooled is worth your consideration!
The unit features a powerful engine that provides smooth operation and less than five percent total harmonic distortion (THD), which means this unit operates smoothly while powering sensitive electronics and appliances.
This generator also includes a durable, all-weather aluminum enclosure that provides three removable sides for convenient service access.
The Generac evolution controller features LED indicators for generator status, utility power presence or maintenance required.
It has a 200 amp NEMA (indoor/ outdoor rated) whole house smart transfer switch that can be mounted indoors or outdoors.
If you’re looking for a generator to use during an extended power outage, the Generac Home Standby Generator 22kW/19.50kW Air Cooled is worth your consideration!
FAQs about what size generator is needed for a 200 amp electrical service
Can I just get by with a small portable generator?
No, a small portable cannot adequately power a full 200 amp panel and all home electrical needs in an outage.
Why is generator capacity rated in kW for homes?
Home standby generators are rated in kilowatts (kW) which determines continuous power output versus surge wattage. Aim for at least 15kW.
How is generator kW capacity calculated?
Take the total amperage of the home electrical service and divide it by two. For 200 amp service, 200/2 = 100 kW minimum generator needed.
Do I need to hire an electrician to install it?
Yes, a licensed electrician is required to safely wire up the automatic transfer switch that integrates the generator.
What fuel source is best for whole house coverage?
Propane or natural gas generators provide convenient long runtimes without gasoline refueling needed.
How often should a home generator be maintained?
Standby generators should be serviced annually, with routine maintenance like oil, filter changes, and inspection every 200 hours.
Final Words
Selecting the right generator size for a 200 amp service is crucial to meet your power needs.
You should consider total wattage, fuel type, and outage duration. This ensures you have reliable power, avoiding inconveniences during outages.
Careful consideration guarantees efficiency and satisfaction in your choice, suiting your specific needs and preferences.
