Most Energy Efficient Dishwashers (2022 UK)

Once upon a time, people believed that dishwashers cost a fortune to run and were considerably less economical than washing dishes by hand. However, especially with modern dishwashers, this couldn’t be further from the truth.

In fact, as dishwashers use their water more efficiently than you do when washing dishes by hand, and because they use less energy to heat the water, it can prove cheaper to run a dishwasher than to wash everything by hand.

However, this does vary depending on the dishwasher in question. For our list here, we’ve picked the most economical dishwashers available on the market based on their energy usage, the upfront price and the reliability of the brand too.

 

How Much Does a Dishwasher Cost to Run?

Energy costs

In March 2021, the energy rating system swapped over to a new, simplified system that got rid of all those annoying pluses. The new system runs from G to A, with G being the least efficient and A being the most efficient.

An A rated dishwasher can use as little as 0.54 kWh of electricity per cycle, which, at the current average unit rate of 28p, works out to be just 15 pence in energy usage per cycle.

A comparable B rated dishwasher uses 0.64 kWh per cycle, equalling 18 pence per cycle. A C rated dishwasher uses even more electricity still at 0.78 kWh per cycle, equalling 22 pence per cycle.

Over the course of a year, the typical household will run their dishwasher 280 times. This means that the A rated dishwasher would cost you £42.33, the B rated dishwasher would cost you £50.40, and the C rated dishwasher would cost you £61.60.

Water costs

The perceived cost of water usage is a key consideration for many households when it comes to choosing whether or not to invest in a dishwasher. At the moment, the typical price of water per litre in the UK is 0.3p.

That means an economical dishwasher using 9.5 litres of water will cost you less than 3p to run, whereas an older dishwasher using closer to 14 litres of water will cost 4p to run.

Over the course of a year, the more economical dishwasher would cost you around £8 in water usage, whereas the less economical dishwasher would cost you closer to £12 in water.

Dishwasher tablets

Depending on which dishwasher tablets you buy, they can work out very expensive. Dishwasher tablets such as those from Finish or Fairy can easily end up costing you 22p each, if not more. If you choose a supermarket’s own brand, you can get the price per tablet down to less than 12p.

Overall running cost

Based on the most economical and efficient dishwasher, you can expect to pay 15 pence in energy and 3 pence in water per dishwasher cycle. Add in the dishwasher tablet, and you end up with 30 pence per cycle.

Over the course of the year, that means that running your dishwasher will cost you approximately £84 all in.

It is worth remembering that some dishwashers require salt and rinse aid to be added, but we haven’t included these here as it varies by machine. With that in mind, however, you can buy a bottle of rinse aid for less than £1.50, and dishwasher salt costs less than £1 per kilo in most supermarkets.

 

The Most Energy Efficient Dishwashers in the UK

We’ve researched the market and picked out five of the most economical dishwashers available in the UK.

In choosing these dishwashers, we selected the products with the lowest energy usage per cycle.

1. Bosch Serie 6 SMS6TCi00E Freestanding Dishwasher

Bosch Serie 6 SMS6TCi00E Freestanding Dishwasher

Energy rating: A
Energy consumption per 100 cycles: 54 kWh
Estimated energy cost per 100 cycles: £15.12
Place settings: 14
Guarantee: 2 years

The Bosch Serie 6 freestanding dishwasher is packed with a range of time and energy saving features that can make your life so much easier. The 89 minute quick wash cycle is perfect for those dinner party emergencies, and the adjustable racking means there is space for even large items.

To save you even more money on your utility bills, this dishwasher is fitted with sensors that work out how dirty your plates are, and then adjust all of the settings accordingly to achieve the best results for the lowest cost.

During regular cycles, the EcoSilence Drive keeps the noise level low anyway, but if you need the dishwasher to be whisper quiet, the silence programme is for you.

Users love that this dishwasher presents good value for money, it’s easy to use and affordable to run.

 

2. Miele G7422SC Wifi Connected Freestanding Dishwasher

Miele G7422SC Wifi Connected Freestanding Dishwasher

Energy rating: A
Energy consumption per 100 cycles: 54 kWh
Estimated energy cost per 100 cycles: £15.12
Place settings: 14
Guarantee: 2 year warranty

Miele’s G7422SC freestanding dishwasher is an eco-friendly dishwasher with more than enough space for the typical medium-sized family.

At the end of the cycle, this dishwasher will even automatically prop the door open slightly to encourage the dishes to dry naturally, saving you reaching for the tea towel.

As part of the testing process, Miele runs the dishwasher for the equivalent of 20 years use, giving you peace of mind in the appliance’s longevity.

This dishwasher also features Miele’s AutoDos system that uses their PowerDisks. The detergent in these disks last around 20 washes, so you don’t need to worry about refilling it each and every time you use the dishwasher.

Instead of inserting a tablet with each use, the dishwasher will instead automatically dispense the perfect amount of detergent at the moment it needs it.

This might be one of the more expensive dishwashers on this list, however, users love that the dishwasher is easy to use, performs well and feels like it is good quality.

 

3. Miele G7410 SC Freestanding Dishwasher

Miele G7410 SC Freestanding Dishwasher

Energy rating: A
Energy consumption per 100 cycles: 54 kWh
Energy cost per 100 cycles: £15.12
Place settings: 14
Guarantee: 2 year guarantee

This Miele dishwasher has a sleek steel finish that will look right at home in a modern kitchen. If you’re in a hurry, this dishwasher has a quick 59-minute cycle that will have your dishes sparkling in no time at all.

To tackle all those awkward small items, this dishwasher has a 3D Multiflex tray that can handle all your cutlery, utensils, measuring spoons and lids with ease. It’s height adjustable too, so it will never get in the way of your mugs and glasses.

Like the Miele G7422SC above, this dishwasher also benefits from the AutoDos detergent system, and that it has been tested to the equivalent of 20 years use.

This dishwasher might be on the pricier side, however it is built to last and provide great results for years to come.

 

4. Bosch Serie 6 SMS6TCi00E Freestanding Dishwasher

Bosch Serie 6 14 Place Settings Fully Integrated Dishwasher

Energy rating: A
Energy consumption per 100 cycles: 54 kWh
Energy cost per 100 cycles: £15.12
Place settings: 14
Guarantee: 2 year warranty

The Bosch Serie 6 dishwasher is a quiet, hassle-free and efficient dishwasher that you can control wherever you are using the Home Connect app.

Instead of the traditional cutlery basket, this Bosch dishwasher has a drawer at the top to help maximise the space on each level. This VarioDrawer is big enough to hold all your cutlery and most knives and utensils, whilst still leaving plenty of space for larger items below.

If you’ve just cooked a delicious meal that’s left loads of residue and burned on food in your pots and pans, simply put these on the bottom shelf and use the IntensiveZone function. This increases the temperature and pressure in the lower basket, without risking any delicate items you’ve placed in the upper basket.

Users love that this dishwasher is easy to use, quiet, can save money on energy bills and that it offers a great range of features for a fairly reasonable price.

 

5. Miele G7460 SCVi Integrated Dishwasher

Miele G7460 SCVi Integrated Dishwasher

Energy rating: A
Energy consumption per 100 cycles: 54 kWh
Energy cost per 100 cycles: £15.12
Place settings: 14
Guarantee: 2 year guarantee

This dishwasher from Miele is full of features designed to save you money and time. If you’re in a hurry, the 58-minute quick wash programme can make light work of normally soiled dishes.

For those times you need to wash large pots and pans or very tall glasses, the racks are all adjustable to make fitting these items in even easier. The Multiflex tray has plenty of space for all your utensils and cutlery, and it is height adjustable too to keep it out of the way.

The Miele@home app allows you to control the appliance remotely, check how long the cycle has left, and start the cycle when you want to.

Whilst some reviewers do feel this dishwasher is expensive, it is worth remembering that it cleans well and is cheap to run, whilst Miele’s testing programme tests the machine to the equivalent of 20 years use.

 

Dishwasher Energy Ratings Explained

As saving energy becomes increasingly important to society, energy rating labels have needed to change. Under the old system, more than 90% of appliances had an A+, A++ or A+++ rating, which just became incredibly confusing to purchasers.

These labels were originally introduced in the 1990s, but the speed at which technology improves meant that it quickly caught up to the best possible ratings, leading to the introduction of the pluses system in 2011.

The scale needed to change to make it easier for consumers to compare products and to bring it up-to-date with modern technological advances.

The new system has got rid of the pluses, and instead runs from A to G, with G being the least efficient and A being the most.

Dishwasher labels used to show measurements based on projected annual usage, however, as this varied by household, it is now based on consumption from the Eco mode over 100 cycles. They also now show the amount of water each cycle uses and how long the Eco cycle takes.

These new dishwasher labels also show the amount of place settings and the noise level, both in decibels and on an A to D scale.

 

Conclusion

All of the five dishwashers listed hear use just 54 kWh of energy per 100 cycles. This means you would only pay 15p per cycle in electricity costs, based on current electricity prices of 28p per kWh.

They are all equally energy efficient, but have different features, styles and prices, so to choose the right one for your home you should consider these other factors.