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How Much Electricity Does Your Dishwasher Use?
5 minute read • Last update October 2024
Washing dishes is a constant chore in every household, often accompanied by the debate over whose turn it is! No matter who ends up handling kitchen duties, considering the water usage and energy consumption involved in clearing the pile is worthwhile.
Homeowners often ask themselves:
- Is it more economical to clean dishes by hand or use a dishwasher?
- How much water does a dishwasher use per cycle?
- How much electricity does a dishwasher use?
- How much does it cost to run a dishwasher compared to washing by hand?
In this quick guide, we’ll cover everything you need to know about dishwasher energy usage so you can make more informed decisions about how to maintain an efficient kitchen.
Understanding dishwasher wattage
Do dishwashers use a lot of electricity? Yes, they can. The average dishwasher consumes between 1,200 and 2,400 watts (1.2 to 2.4 kWh) per load, which is quite a lot compared to many other appliances. For example, 20 hours of TV electricity usage usually adds up to around 2,000 watts.
However, washing dishes by hand also uses energy because electricity is required to heat the water. The exact energy cost will depend on how many gallons of water your dishwasher uses per cycle and the energy needed to heat it. But to give you a ballpark idea, the average electric water heater uses 4,000 watts—significantly more than a dishwasher.
Understanding how much electricity a dishwasher uses gives us a good foundation, but to truly optimize energy consumption and reduce costs, it’s important to consider several key factors that influence a dishwasher’s energy use.
Factors that affect dishwasher wattage
As a general rule, more dishwasher watts mean more electricity usage, leading to a higher utility bill. However, the precise cost to run a dishwasher will vary depending on the type, size, and condition of your appliance and how frequently you need to run a full load. Here are a few essential considerations:
- Larger dishwashers typically require more power but can also accommodate more dishes per cycle. So they may use less power in the long run.
- Regardless of size, a newer model may be more efficient than an older model due to wear and tear on parts, which can negatively impact efficiency over time.
- Washers with higher-quality insulation blankets can maintain water temperature more efficiently, reducing the energy needed for heating during cycles.
- Dishwashers with short cycles and air-drying capabilities consume less energy than those with long cycles and heat drying.
- Models that rely on an internal heating element may consume more electricity than those that use hot water from a water heater.
- Energy-efficient dishwashers use much less power–typically only 1.02 kWh to 1.19 kWh per load.
By considering these factors, you can make more informed decisions to optimize usage and save energy, water, and money.
Dishwasher vs hand washing
Wondering how dishwashers stack up against hand washing? Many homeowners are surprised to learn that modern dishwashers are more efficient! Let’s take a look at why that’s the case.
Dishwasher vs hand washing: water usage
Dishwashers save water. But precisely how much water does a dishwasher use? An Energy-Star-rated dishwasher uses about 3.5 gallons of water per cycle, whereas it would take around 27 gallons to handwash the same number of plates in the sink.
Dishwasher vs hand washing: energy usage
The water heating process is the most energy-intensive stage in terms of dishwasher power usage. However, given the large amount required, it is still more economical than using a water heater to generate enough hot water for hand washing.
Now let’s explore how the energy and water savings from dishwashers can affect your utility expenses. It’s estimated that dishwasher use accounts for a small fraction of your bill. Considering the average electricity bill in Texas, that works out to $84-$110 a year depending on specific models and settings.
How much electricity does a dishwasher use per cycle?
A typical dishwasher cycle can last from 1 to 4 hours, with energy consumption varying depending on the phase of the cycle. Here’s a breakdown of average power usage:
- Initial Fill: Minimal energy is used unless the dishwasher heats the water initially.
- Heating Process: During water heating, energy consumption can range from 1200 to 1500 watts, especially if the cycle includes options for high-temperature washing.
- Drying Cycle: This phase can consume 700-1000 watts, particularly if the heated dry option is used.
Energy usage per wash cycle will vary based on the specific dishwasher model, settings chosen, and local energy rates.
Understanding dishwasher cycles
Ever wondered which dishwasher cycle is best for your needs? Here’s a list of the most common types of dishwasher cycles, when to use them, their duration, and the energy each requires.
- Pre-wash/rinse cycle: A quick 5-8 minute cycle that rinses off food residues to loosen dried-on leftovers. Typically consumes around 500 watts of power.
- Quick wash cycle: Best for lightly soiled dishes that just need a quick clean. These cycles take about an hour and use approximately 1000 watts of power.
- Eco-friendly mode: Most newer dishwashers feature an eco-mode that uses less water and energy while still providing effective cleaning. Despite an extended wash time of 2-4 hours, this cycle typically only uses 800-1200 watts of power.
- Delicate Cycle: Ideal for fragile items like glassware and china, this cycle uses lower temperatures to provide a gentle clean while minimizing the risk of damage. Power usage generally falls between 1000 to 1200 watts over 1-2 hours.
- Normal cycle: Designed to wash dishes with normal soil levels efficiently. Expect to use around 1500 watts over a wash time of about an hour.
- Sensor cycle: This cycle automatically optimizes water usage and temperature based on the load’s soil level, extending wash times to 1-2 hours. Electricity consumption varies from 1500 to 2000 watts depending on the load.
- Hi-temp cycle: Increases water temperature to enhance cleaning performance, generally consuming about 1500 to 2000 watts over 3-4 hours.
- Heavy duty cycle: Aimed at cleaning pots and pans, this intensive cycle also lasts 3-4 hours and uses around 2000 watts due to higher temperatures and increased water usage.
- Sanitize cycle: Raises wash temperature to adequately sanitize dishes, typically requiring 3-4 hours and over 2500 watts due to higher heating demands.
Understanding the water consumption and energy demand of each cycle type can help you use your dishwasher more effectively, reducing your utility bills and ensuring your dishes come out sparkling clean.
Tips for reducing dishwasher electricity usage
Whether you’re looking for ways to conserve water, save money by lowering your electricity bill, or simply reduce your environmental impact, these handy tips for improved dishwasher efficiency can help:
- Always wait until you have a full load before running your dishwasher.
- Use cold cycles rather than hot or warm water settings for lightly soiled loads.
- Scrape plates rather than pre-rinsing dishes before placing them in the dishwasher.
- Let your dishes air dry whenever possible instead of using the heated drying option.
- Keep your dishwasher clean and well-maintained for optimal performance.
You may also want to consider upgrading your current dishwasher. When it’s time for a replacement, be sure to choose an energy-efficient dishwasher. Buying an ENERGY STAR-rated dishwasher is recommended. Washers with an ENERGY-STAR label meet strict Environmental Protection Agency (EPA) guidelines and could save you 5,800 gallons of water over the long term.
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Maximizing the efficiency of your dishwasher can significantly reduce your utility bills, contributing to a more sustainable home.
At BKVE, we understand the importance of keeping energy costs low while providing fair prices, simple plans, and transparent communication. We offer affordable electricity plans tailored to meet your needs, with clear communication—and no mind-boggling contracts, guaranteed!
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