If you want to know what size generator you need for 200-amp service for residential, commercial, and workplace use, read to the end of this article. We also recommend the best generators for 200-amp service.
For 200-amp service, it is imperative to have a powerful backup generator to provide power during power outages.
However, choosing the right size generator for 200-amp service requires engineering considerations to ensure it meets your power needs and is efficient.
In this article, we provide a detailed guide on generator sizing for 200-amp service and how to determine the right size generator for your home.
What size generator is appropriate for 200-amp service for residential or commercial use?
For 200-amp service, a generator with a power of at least 72,000 watts (1.5 x 48,000 watts) is recommended. This ensures that your generator can handle the load without overloading or tripping, and provides enough power for essential appliances such as heating, ventilation, and air conditioning systems, refrigerators, lighting, and electronic equipment.
Determining the Correct Generator Size for 200-Amp Service
When sizing a generator for 200-amp service, there are several factors to consider, including the total wattage of the electrical loads you want to power with the generator, the power requirement derived by adding the wattage of all the devices you want to connect to the generator, and some margin for possible voltage surges or additional loads.
Also, choose a generator with an output at least as large as your total power needs.
For a 200-amp service, a generator rated at 20,000 to 25,000 watts (or 20 to 25 kilowatts) will suffice.
To illustrate how to determine the correct generator size for 200-amp service, consider the following examples:
Example 1:
You want to power your entire home during a power outage, including your HVAC system, refrigerator, water heater, lights, and electronics.
They calculate the total power needed to be about 22,000 watts. In this case, a generator rated at 22,000 watts or more would be appropriate for your 200-amp service.
Example 2:
You only need to power necessary appliances and equipment during a power outage, such as B. your refrigerator, a few lights, and a television.
They calculate the total power needed to be about 5,000 watts. In this case, a smaller generator of 5,000 watts or more will be suitable for your 200-amp service.
Example 3:
You need to keep your small business’ computers, printers, and lighting powered during a power outage.
They calculate the total power requirement to be about 10,000 watts. In this case, a generator rated at 10,000 watts or more will be suitable for your 200 amp service. Here are our recommendations for the best 10kW generators.
We also have a generator sizing guide for 50-amp RVs. Read this article if you own a small or medium-sized RV.
How many watts do I need for a 200 amp service?
The wattage required for a 200 amp service depends on the voltage of the electrical system.
In most residential or commercial environments in North America, the standard voltage is 120/240 volts. Therefore, a 200 amp service can provide a maximum capacity of 48,000 watts (200 amps x 240 volts).
It is worth noting that this maximum capacity is not always available.
The actual electrical load on the system may vary depending on the equipment and facilities used, and the total electrical load must not exceed the capacity of the service.
In addition, I recommend leaving a safety margin and not using the full capacity of the service to avoid overloading the system and possible damage or safety risks.
Below are some of the equipment commonly used in a 200 amp 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
· Radiant heater: 750-1,500 watts
· Ceiling fan: 10-120 watts
· TV: 50-400 watts
· Computer: 150-400 watts
· Washing machine: 1,200-2,000 watts
· Tumble dryer: 1,800-5,000 watts
· Kettle: 1,200-1,500 watts
· Electric grill: 1,200-1,500 watts
· Air purifier: 50-100 watts
What are the best Generators for 200AMP service?
| Model | Starting Watt | Running watts | Outlets | Noise level | Fuel type | Runtime |
| Honda EU7000iS | 7,000W | 5,500W | 2 x 120V 20A, 1 x 120/240V 30A, 1 x 120/240V 50A | 52-60dB | Gasoline | 6.5-18 hours |
| Generac GP8000E 8 | 8,000W | 6,800W | 2 x 120V 20A, 1 x 120/240V 30A Twist Cap, 1 x 120/240V 50A | 70dB | Gasoline | 10 hours |
| Champion 7500 Watts | 9,375 W | 7,500 W | 4 x 120 V 20 A, 1 x 120/240 V 30 A, 1 x 120/240 V 50 A | 74 dB | Gasoline | 8 hours |
| Westinghouse 12000W | 12,000W | 10,800W | 2 x 120V 20A, 2 x 120V 30A, 1 x 120/240V 50A | 72dB | Gasoline | 11 hours |
| Briggs & Stratton | 10,000W | 8,000W | 4 x 120V 20A, 1 x 120/240V 30A, 1 x 120/240V 50A | 76dB | Gasoline | 9 hours |
| Duromax XP12000EH | 12,000 W | 9,500 W | 2 x 120 V 20 A, 1 x 120/240 V 30 A Nut, 1 x 120/240 V, 50 A | , 72 dB | Dual Fuel, 8.83 hrs (gasoline), | 7.2 hrs (propane) |
Does a 200-amp three-phase system equate to 600 total amps?
A three-phase system consists of three conductors carrying AC 120 degrees out of phase with each other.
This allows for more efficient and balanced power distribution than a single-phase system where only one conductor carries AC.
In a three-phase system, the current flowing through each conductor (phase) is different from the current flowing through the other two phases.
The total current of the system is the sum of the currents in each of the three phases.
For example, in a 200-amp three-phase system, each phase will carry approximately 115 amps (because 200/√3 is approximately 115). Therefore, the total current of the system is approximately 345 amps (115 + 115 + 115).
It is important to note that the total amperage of a system is not the only factor that determines its capacity or performance.
Conclusion for “What size generator for 200AMP service”
In conclusion, selecting the right size generator for a 200-amp service requires careful consideration of the total wattage needed to power your essential appliances and devices. A 200-amp service typically requires a generator in the range of 12,000 to 15,000 watts, depending on your specific needs, such as the number of appliances or systems you plan to run simultaneously.
It’s important to factor in both startup and running wattage to ensure that the generator can handle surges in power demand, especially for larger appliances like air conditioners, refrigerators, and heating systems. For added reliability, always consider opting for a generator with a bit more capacity than required, ensuring that your home or business stays powered even during unexpected demand spikes.
FAQ
Can I upgrade to a 200-amp service from a lower amperage service?
Yes, you can upgrade a lower amp service to a 200 amp service. However, this requires a licensed electrician to install, which may involve upgrading the panel and wiring.
What should I consider when upgrading to 200 amp service?
Upgrading to a 200 amp service typically requires installing a larger panel and upgrading the wiring to handle the increased electrical load. This may also require upgrading the meter receptacle and service input cabling.
What are the benefits of upgrading to a 200 amp service?
Upgrading to a 200 amp service can provide a variety of benefits, including increased electrical capacity, improved electrical performance, and increased safety. It can also allow for the installation of additional electrical equipment, such as chargers for electric vehicles or high-performance equipment.
Can I upgrade to a 200 amp service myself?
No, upgrading to 200 amp service can only be performed by a licensed electrician. Attempting to perform the upgrade yourself can be dangerous and may result in electrical hazards or other safety issues.