When the power goes out, many homeowners scramble for solutions to keep their food fresh and safe. A reliable generator can save the day, but choosing the right size generator for your needs can be a bit daunting. If you’re wondering, “what size generator do I need to run two refrigerators?” you’re not alone. This comprehensive guide will walk you through the important aspects of generator sizing, including power requirements, generator types, and best practices for usage.
Understanding Power Requirements
Before selecting a generator, it’s crucial to understand the power requirements of the appliances you wish to run, in this case, two refrigerators. Refrigerators, like other appliances, have both continuous running wattage and starting wattage.
Continuous Vs. Starting Wattage
Continuous Running Wattage: This is the amount of power that the refrigerator uses while it is running. Most modern refrigerators have a rating that can be found on a label inside the door or in the user manual.
Starting Wattage: Refrigerators require more power at startup, especially if they have compressors. The startup wattage can be about 2 to 3 times higher than the continuous wattage.
To determine the total wattage required for two refrigerators, you need to calculate both types of wattages and sum them up.
Calculating Wattage Requirements
To ensure you purchase a generator capable of handling your appliances, follow these steps:
Step 1: Gather Information
Collect the specifications for your refrigerators. Check the manufacturer’s label for the following:
- Continuous Running Wattage (CRW): Look for the wattage rating, usually expressed in watts.
- Starting Wattage (SW): If not clearly listed, it’s generally safe to assume starting wattage is 2 to 3 times the continuous running wattage.
Step 2: Calculate Total Wattage
Suppose you have two refrigerators with the following specifications:
- Refrigerator A:
- Continuous Running Wattage: 200 watts
Starting Wattage: 600 watts
Refrigerator B:
- Continuous Running Wattage: 250 watts
- Starting Wattage: 750 watts
To find the total requirements:
- Total Continuous Running Wattage = 200 watts + 250 watts = 450 watts
- Total Starting Wattage = 600 watts + 750 watts = 1350 watts
This means you will need a generator that can handle 450 watts continuously, but it must also support a starting capacity of at least 1350 watts to handle both refrigerators starting up at the same time.
Choosing the Right Generator Size
Now that you understand the basic wattage calculations, you can begin to choose the right size generator.
Generator Types
There are several types of generators available on the market, each with its own advantages and disadvantages.
Inverter Generators: These are quieter and more fuel-efficient. Inverter generators also provide a stable power supply, making them perfect for sensitive devices. Due to their size and output ranges, they can typically handle lower wattage appliances well. However, if you plan to use them for higher wattage applications, ensure you choose an adequately rated model.
Conventional Generators: These typically offer higher wattage output, are generally more affordable, but can be noisier. They excel at powering multiple high-wattage appliances, such as refrigerators, air conditioners, and power tools.
Recommended Generator Size
Based on the previous calculations, you should aim for a generator with at least:
- Minimum Continuous Wattage: 500 watts
- Minimum Starting Wattage: 1500 watts
It is wise to choose a generator that exceeds minimum wattage recommendations to provide an extra safety buffer, especially if you plan to run additional appliances.
Generator Features to Consider
When selecting a generator, consider the following features:
Portability
If you plan to move your generator around (for example, taking it to different locations during power outages or outdoor activities), portability is crucial. Look for generators that come with wheels and handles for ease of transport.
Noise Level
Generators can be noisy, so look at the decibel (dB) rating. Inverter generators are typically quieter, making them suitable for residential use where noise can be an issue.
Fuel Type
Generators can run on various fuel types, including gasoline, propane, or diesel. Choose a fuel type that is readily available in your area and matches your usage needs.
Runtime and Efficiency
An efficient generator will maximize fuel usage, providing longer runtimes. Check the fuel tank capacity and m fuel consumption rates for efficiency.
Safety Features
Look for generators with safety features like:
– Low-oil shutoff
– Overload protection
– Circuit breakers
These features will help protect your appliances and the generator itself.
Installation and Usage Tips
Once you have chosen a generator, it’s essential to understand how to use it safely and effectively.
Placement
Always position your generator outside and ensure it’s at least 20 feet away from your home. This is crucial to avoid carbon monoxide poisoning, which can occur from exhaust fumes.
Connecting the Generators to Refrigerators
There are two primary ways to connect your generator to your refrigerators:
Extension Cords: For smaller generators, use heavy-duty extension cords rated for the combined load of both refrigerators. Make sure the cords are long enough to reach your appliances without stretching.
Transfer Switch: For larger installations, a transfer switch is the safest method. This option allows you to connect your generator to the main electrical panel of your home, providing a way to power various circuits, including those for your refrigerators.
Regular Maintenance
To keep your generator running efficiently, adhere to a regular maintenance schedule. This should include tasks like:
- Changing the oil
- Cleaning or replacing air filters
- Inspecting spark plugs
- Checking fuel levels and battery condition if applicable
Conclusion
Choosing the right generator to run two refrigerators is a crucial decision that can save your food and provide peace of mind during outages. The key steps involve calculating the wattage requirements, selecting an appropriately sized generator, and taking care of safety and maintenance practices. A generator that meets at least 1500 watts of starting power and is capable of continuous operation will ensure your appliances function optimally. With the right generator, you’ll be well-equipped to handle any unexpected power interruptions and keep your household running smoothly.
What size generator do I need to run two refrigerators?
To run two refrigerators effectively, you typically need a generator with a starting wattage capacity of at least 3,000 to 4,000 watts. Most standard refrigerators require about 600 to 800 watts for continuous running, but during start-up, they may draw up to 1,200 to 2,000 watts. Therefore, when sizing your generator, consider the combined starting wattage of both units to ensure that it can handle the load without tripping the circuit.
Additionally, it’s essential to account for other factors like the age and energy efficiency of your refrigerators, as older models may require more power than newer ones. Always check the manufacturer’s specification label on the refrigerators to find their wattage requirements and ensure you choose a generator that has a sufficient power rating to handle them comfortably.
Can I run two refrigerators on a smaller generator?
Running two refrigerators on a smaller generator is possible, but it is not recommended unless you’re willing to risk overloading the generator. If the generator’s wattage capacity is under the combined starting wattage of both refrigerators, it may struggle to maintain power, leading to overloads that can damage both the generator and the appliances. In this scenario, one or both refrigerators may not start properly, resulting in spoilage of food and potential losses.
If you are considering this option, it’s critical to monitor the electricity consumption closely. You might be able to stagger the usage by running only one refrigerator at a time, but this isn’t ideal for food preservation, especially in cases where both units must remain operational continuously. Ultimately, investing in the right-sized generator is the best approach for reliability and safety.
What is the difference between starting watts and running watts?
Starting watts refer to the amount of power needed to start appliances, which usually occurs in a short burst when the appliance is initially powered on. This is particularly relevant for devices with motors, such as refrigerators, which require extra energy for the initial surge to kick on the compressor. The starting wattage can be significantly higher than the running wattage, which is the power needed to keep the appliance operating once it is running smoothly.
In contrast, running watts are the continuous amount of power required for the appliance to maintain its operation once it is started. For example, while a refrigerator may require 1,800 starting watts to kick on, it might only need 600 to 800 running watts to operate. Understanding both of these measurements is crucial when sizing a generator, ensuring it can handle the initial power demand as well as the continuous load.
How do I calculate the total wattage needed?
To calculate the total wattage needed for two refrigerators, start by locating the wattage specifications for each unit. This information is often found on a label inside the door or on the back of the appliance. Write down the running watts and starting watts for each refrigerator and add them together. Factor in any additional devices you may want to power simultaneously, like alarms or lights, that could increase your overall wattage requirements.
Once you have the total wattage for both refrigerators and any other devices, it’s critical to ensure that the generator exceeds this total wattage since generators have a limitation on how much they can handle at once. Incorporate a margin of safety—generally, an additional 20% above the total estimated wattage is recommended to account for fluctuations and surges during operation. This will help you avoid potential overload situations and protect both the appliances and the generator itself.
Can I connect refrigerators directly to a portable generator?
Yes, you can connect refrigerators directly to a portable generator, provided that you do so safely and correctly. Using heavy-duty extension cords rated for the necessary load and ensuring that the generator is placed in a well-ventilated area can help prevent accidents related to carbon monoxide exposure. Always confirm that your generator’s outlet matches the cord’s plug type and that the cord is of adequate length to reach the refrigerators without causing strain.
It’s essential, however, to follow the manufacturer’s recommendations for both the refrigerator and the generator, as well as any local regulations regarding generator use. If you’re uncertain about the setup, consider consulting a professional electrician to ensure everything is safely connected. Additionally, avoid plugging the refrigerators into a generator while they are connected to the home’s electrical system to prevent back-feeding, which can be dangerous and illegal.
What type of generator is best for powering two refrigerators?
The best type of generator for powering two refrigerators is a portable inverter generator, as these types are known for providing clean and stable electricity suitable for sensitive electronics. Inverter generators are quieter than conventional generators, making them ideal for residential use and ensuring that appliances receive consistent wattage without surges that could damage their internal components. Look for models with sufficient starting and running wattage to cover both refrigerators.
Additionally, you should consider a generator that offers features like overload protection, automatic voltage regulation, and fuel efficiency. A dual-fuel generator, which can run on both gasoline and propane, also provides flexibility and can be particularly advantageous during extended power outages. Ultimately, the best generator will depend on your specific needs, but ensure it meets the wattage requirements while also providing reliability and efficiency.