Dishwasher power consumption maximum

When choosing a dishwasher, you should pay attention to the power rating. It can vary from 0.4 kW to 2.7 kW. Modern equipment is produced with a minimum energy consumption, on average it is 0.7 kW. The power of a dishwasher depends on the size of the water tank, the amount of liquid heated, the type of drying and many other factors.

What is the difference between power and energy consumption?

Power is the maximum amount of energy that is consumed in one second, provided that all mechanisms are working. And energy consumption is the amount of electricity per 1 hour of operation of the device. During this time, some parts that consume energy can work for minutes, so the energy consumption figure is less than power.

What does the power of the machine affect?

Power consumption directly depends on the class of household appliances . The level of energy consumption depends on the selected program and how much water is used for a full wash cycle. Heating a large volume of water will require a lot of time and electricity. The operating programs also differ in wash duration.

How to choose the optimal dishwasher power

Manufacturers produce devices that consume a small amount of electricity and water per month and still work efficiently. The most optimal models are considered to be devices of class A++, A+ A, B.

How energy is spent when washing dishes

The power consumption of a dishwasher, W depends on how many watts of electricity are spent on:

• heating water to the temperature specified by the program;
• pump operation while washing and rinsing dishes;
• fan drying using hot air.

Residents of houses with a central hot water supply can significantly reduce their energy consumption by connecting the dishwasher to a hot water tap. If connected to a hot water source, even the power of a dishwasher, W Class C, will be energy efficient.

What components and parts affect energy consumption?

At different stages of the washing cycle, different components are involved in the work. You need a lot of electricity:

• heating element;
• circulation and drain pumps;
• forced drying system.

Calculating the cost of electricity when operating a dishwasher

Let's look at a specific example and find out how much electricity a dishwasher consumes. The maximum load of the PMM is 9 sets of dishes. A class A machine consumes 0.78 kW per hour. Per year, based on 280 washing cycles in economical mode of electricity and cold water consumption, it consumes 220 kW/h. In fact, electrical energy consumption depends on the direct use of the device.

How to reduce costs?

Before buying a dishwasher, you should read the recommendations of experts on how many kilowatts the dishwasher consumes. To ensure that your appliances consume a minimum of watts of energy, it is advisable to wash dishes in the “Delay Start” mode. First, start the washing program, after pumping in water, stop the program and set it to night time. The night tariff for electricity is lower , this will reduce its costs.

There are some more tips:

• Don't leave dirty dishes behind . In order to wash dried food you will need very hot water and double rinsing, hence more energy.
• Suitable washing modes should be selected . Less dirty dishes can be washed using the shortest program at 30°.
• There is no need to start the car if there are 3 dirty dishes . You can really save water, electricity and detergents by actively using the half-load mode.
• The dishwasher will consume much less energy and water if you place dishes in the baskets correctly .
• The appliance must be descaled regularly . If you calculate how much electricity a clean heating element and one covered with scale consumes, the difference will be significant.

How to save energy

A significant part of the electricity is spent on heating water. You can often find recommendations to connect the machine directly to the hot water system in the house. After all, the dishwasher analyzes the temperature of the incoming water and compares it with the set one; if there is a difference, it turns on the heating. How effective are these savings? This is determined by the origin of the hot water in a particular home.

1. If a boiler provides hot water, then it is reasonable to compare its power with the power of heating water in a dishwasher. If the boiler consumes less power, there is every reason to use its hot water.
2. If you live in a standard house with hot water supply, you need to compare the cost of a cubic meter of cold and hot water. It often happens that it is cheaper to heat cold water in the dishwasher than to connect hot water.
3. If the apartment has a gas water heater, then given the low cost of gas, it makes sense to use water heated in the water heater.

In order for your dishwasher to use less electricity and at the same time remain efficient, it is advisable to listen to the following recommendations.

1. Dishes are washed with a delayed start. Turn on the machine until its water tank is completely filled with water and pause the program so that the machine turns on again at night. On the one hand, in a few hours the water in the tank will warm up to room temperature and it will need to be heated less, on the other hand, the nightly electricity tariff is much lower.
2. Do not accumulate heavily soiled dishes. Residues of food dried on the plates will require a lot of energy to put the dishes in order. You will need very hot water and double rinsing. All this is very energy-consuming.
3. As mentioned above, it is better to purchase machines with a built-in heat exchanger.
4. It is necessary to select the most optimal dishwashing modes. If the dishes are not very dirty, you can turn on the wash at 30°C and use the shortest program.
5. Advanced models have beneficial optional modes, such as “accelerated washing”. The entire washing cycle takes 30 minutes. The disadvantage of such devices is their small capacity of dishes. A small family of 4 people can use such dishwashers.

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It must be taken into account that new technologies are rapidly advancing the process, and new types of machines appear on the market that work more efficiently and with low energy resources .

Energy efficiency class of dishwashers

How many watts a dishwasher has can be determined by what class it belongs to. The indicator is assigned depending on the amount of electricity consumed.

Energy efficiency class table

Water consumption

Dishwasher water consumption varies depending on the brand and year of manufacture. There is a general rule: the more expensive the dishwasher, the less it consumes. No matter how simple and old the car is, its consumption rarely exceeds 20 liters. Modern devices, not even in economy mode, consume no more than 10 liters.

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Consumption depends on the program, dishwasher power and degree of soiling of the dishes. To prevent overspending, it is enough to soak dishes with dried or burnt food residues. After that, she easily copes with them even in economy mode.

Let's say you need to wash 10 sets of dishes. Theoretically, it can be calculated that about 2 liters flow out of the tap per minute. water. Even the most skilled housewives will take at least 10 minutes to make this amount of dishes, which is at least 20 liters, which significantly exceeds the consumption of the machine.

Why are some dishwashers economical and others not?

The energy consumption of a dishwasher that does not use hot drying is significantly lower. To a large extent, its consumption depends on the volume of the tank and the temperature of the water in it . The smaller it is, the less water the device will spend per washing cycle, which means lower energy consumption. Models that use unique technical solutions are considered economical. First of all, this is an inverter motor, which is significantly more economical. And the latest Bosch models are equipped with a heat exchanger that saves thermal energy. To connect the dishwasher, use a 16-amp circuit breaker or a circuit breaker rating of 10 A.

Power and energy consumption of a dishwasher: how to choose economical equipment?

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