If you want to know what size generator for 200 amp service for residential, commercial, and work site use, read this article to the end. We have also given our suggestions for the best 200-amp service generators.
For a 200-amp service, it is imperative to have a powerful backup generator to provide power during outages.
However, selecting the right generator size for a 200-amp service requires technical considerations to ensure it meets your electrical needs and is efficient.
In this article, we’ll provide a detailed guide on “What Size Generator for 200 Amp Service” and how to determine the appropriate generator size for your home.
What Size Generator for 200 Amp Service Residental or Commercial?
For a 200-amp service, a generator with a power capacity of at least 72,000 watts (1.5 x 48,000 watts) would be recommended. This will ensure that your generator can handle the load without overloading or tripping and provide enough power for critical appliances such as the HVAC system, refrigerator, lights, and electronics.
Determining the Right Generator Size for a 200 Amp Service
When selecting a generator size for a 200 Amp service, several factors need to be considered, including the total wattage of the electrical load you plan to power with the generator, the power requirement by adding up the wattage of all the devices you plan to connect to the generator, and some headroom to account for potential power surges or additional loads.
Also, select a generator with a power output that is at least as large as your total power requirement.
For a 200 Amp service, a generator with a power output of 20,000 to 25,000 watts (or 20 to 25 kilowatts) should be enough.
To help illustrate how to determine the right generator size for a 200-amp service, consider these examples:
You want to power your whole house during a power outage, including your HVAC system, refrigerator, water heater, lights, and electronics.
You calculate that the total power requirement is around 22,000 watts. In this case, a generator with a power output of 22,000 watts or higher would be appropriate for your 200 Amp service.
You only need to power essential appliances and devices during a power outage, such as your refrigerator, a few lights, and a TV.
You calculate that the total power requirement is around 5,000 watts. In this case, a smaller 5000 watts generator or higher would be appropriate for your 200 Amp service.
You need to power a small business with computers, printers, and lighting during a power outage.
You calculate that the total power requirement is around 10,000 watts. In this case, a generator with a power output of 10,000 watts or higher would be appropriate for your 200-amp service. Here is our suggestion for the top 10kW generators.
We also got a guide on generator size for 50 amp RV. Read that if you own a small to medium size RV.
What are the Required Watts for a 200 Amp Service?
The required watts for a 200 amp service will depend on the voltage of the electrical system.
In a typical residential or commercial setting in North America, the voltage is 120/240 volts. Therefore, a 200-amp service will provide a maximum capacity of 48,000 watts (200 amps x 240 volts).
It’s important to note that this maximum capacity is always not always available.
The actual electrical load on a system can vary depending on the devices and appliances in use, and the total electrical load cannot exceed the capacity of the service.
Additionally, I will recommend having a margin of safety by not using the entire capacity of the service to avoid overloading the system and potentially causing damage or safety hazards.
Here are some of the commonly used appliances in a 200-amp service home or commercial building.
- Toaster: 800-1,500 watts
- Coffee maker: 800-1,200 watts
- Blender: 300-1,000 watts
- Hair dryer: 1,200-1,800 watts
- Iron: 1,000-1,800 watts
- Vacuum cleaner: 600-2,000 watts
- Space heater: 750-1,500 watts
- Ceiling fan: 10-120 watts
- TV: 50-400 watts
- Computer: 150-400 watts
- Washer: 1,200-2,000 watts
- Tumble dryer: 1,800-5,000 watts
- Electric water kettle: 1,200-1,500 watts
- Electric grill: 1,200-1,500 watts
- Air purifier: 50-100 watts
What Are the Best Generators for 200 Amp Service?
|Model||Starting Watts||Running Watts||Outlets||Noise Levels||Fuel Type||Runtime|
|Honda EU7000iS||7,000W||5,500W||2 x 120V 20A, 1 x 120/240V 30A, 1 x 120/240V 50A||52-60 dB||Gasoline||6.5-18 hours|
|Generac GP8000E||8,000W||6,800W||2 x 120V 20A, 1 x 120/240V 30A twist-lock, 1 x 120/240V 50A||70 dB||Gasoline||10 hours|
|Champion 7500-Watt||9,375W||7,500W||4 x 120V 20A, 1 x 120/240V 30A, 1 x 120/240V 50A||74 dB||Gasoline||8 hours|
|Westinghouse 12000W||12,000W||10,800W||2 x 120V 20A, 2 x 120V 30A, 1 x 120/240V 50A||72 dB||Gasoline||11 hours|
|Briggs & Stratton||10,000W||8,000W||4 x 120V 20A, 1 x 120/240V 30A, 1 x 120/240V 50A||76 dB||Gasoline||9 hours|
|Duromax XP12000EH||12,000W||9,500W||2 x 120V 20A, 1 x 120/240V 30A twist-lock, 1 x 120/240V 50A||72 dB||Dual Fuel||8.83 hours (Gasoline), 7.2 hours (Propane)|
Is A 200 Amp 3-Phase Service Equal to A Total Of 600 Amps?
A 3-phase electrical system consists of three conductors that carry alternating currents that are 120 degrees out of phase with each other.
This results in a more efficient and balanced distribution of power compared to a single-phase system, which has only one conductor carrying an alternating current.
In a 3-phase system, the current flowing through each conductor (phase) is not the same as the current flowing through the other two phases.
The total amperage of the system is the sum of the amperages of each of the three phases.
For example, in a 200 Amp 3-phase system, each phase would carry approximately 115 Amps (since 200/√3 is approximately equal to 115). Therefore, the total amperage of the system would be approximately 345 Amps (115 + 115 + 115).
It’s important to note that the total amperage of a system is not the only factor that determines its capacity or capability.
Frequently Asked Questions (FAQs)
Can I Upgrade From a Lower Amp Service to a 200-Amp Service?
Yes, it is possible to upgrade from a lower-amp service to a 200-amp service. However, this will require a licensed electrician to perform the installation, which may involve upgrading the electrical panel and wiring.
What Is Involved in Upgrading to a 200-Amp Service?
Upgrading to a 200-amp service typically involves installing a larger electrical panel and upgrading the wiring to handle the increased electrical load. This may also require upgrading the meter socket and the service entrance cable.
What Are the Benefits of Upgrading to a 200-Amp Service?
Upgrading to a 200-amp service can provide several benefits, including increased electrical capacity, improved electrical performance, and enhanced safety. It can also allow for the installation of additional electrical devices, such as electric vehicle chargers or high-powered appliances.
Can I Perform the Upgrade to 200 Amp Myself?
No, upgrading to a 200-amp service should only be performed by a licensed electrician. Attempting to perform the upgrade yourself can be dangerous and can result in electrical hazards or other safety issues.
Josh is a highly skilled electrician with specialized expertise in the field of generators. With years of experience under his belt, he has established himself as an expert in all aspects of generators, ranging from installation and maintenance to troubleshooting and repairs. Josh’s in-depth knowledge of electrical systems and his commitment to staying updated with the latest industry advancements make him a reliable and sought-after professional.