The cheapest appliance in the shop is often the most expensive to own.

 

Why Buying Efficient Appliances Saves More Than Electricity

“The cheapest appliance in the shop is often the most expensive to own.”

When we buy a new appliance, the first number we usually notice is the price on the ticket.

£299 for a washing machine looks better than £449.
£450 for a fridge-freezer looks better than £650.
A bargain dishwasher in the sale looks tempting when the old one has finally given up.

But the purchase price is only the first payment.

The real cost of an appliance is spread over years. Sometimes decades. Every time the fridge compressor starts, every time the freezer holds its temperature overnight, every time the washing machine heats water, and every time the dishwasher runs an eco cycle, the appliance is still quietly costing money.

That is why energy efficiency matters. It does not just save electricity. It saves money, reduces waste, lowers demand on the grid, makes better use of solar panels and batteries, and often means buying a better-designed machine in the first place.

In a home like ours, with solar panels, battery storage, an air source heat pump and years of monitoring real energy use, you quickly learn that electricity is not an abstract idea. It is not just a number on a bill. It is something you can measure, store, waste, shift, and save.

And one of the easiest practical actions any household can take is this:

Before buying an appliance, calculate what it will cost to run.

The Label Has Changed, But the Principle Has Not

Many people still talk about A, A+, A++ and A+++ appliances. That used to be the familiar scale.

However, in the UK, energy labels for many products have been rescaled to a simpler A–G system, replacing the old A+++ to G style for affected products. The first phase of this change took place in March 2021, covering products such as dishwashers, washing machines, washer-dryers and refrigeration appliances.

This means you need to be careful.

An old “A+++” label and a new “A” label are not simply part of the same scale. The scale has been reset so modern labels leave room for future improvement. In 2026, for many appliances, A is the best rating and G is the least efficient.

But the most important figure is not the letter.

It is the kWh figure.

The label tells you how much electricity the appliance is expected to use. For fridges and freezers, this is usually shown as kWh per year. For washing machines and dishwashers, it may be shown per 100 cycles. That number is where the real calculation begins.

Purchase Price Is Not the Real Cost

Imagine two fridge-freezers.

The first costs £450 and uses 300 kWh per year.
The second costs £600 and uses 160 kWh per year.

The cheaper model saves £150 on the day you buy it.

But the efficient model saves 140 kWh every year.

Using Ofgem’s average electricity unit price of 26.11p per kWh for the period 1 July to 30 September 2026, that 140 kWh saving is about £36.55 per year.

Over ten years, that is £365.50.

Over fifteen years, that is £548.25.

Suddenly the “expensive” appliance is not so expensive. The cheaper appliance may actually be the costly one.

This is the problem with judging appliances by the shelf price alone. We see the money leaving our account today, but we do not see the small daily costs adding up over years.

The Simple Formula Everyone Should Use

You do not need to be an energy expert. You only need three figures:

Annual energy use in kWh
Your electricity price per kWh
Expected life of the appliance

The formula is:

Annual running cost = kWh per year × electricity price

Lifetime running cost = annual running cost × expected years of use

Payback time = extra purchase price ÷ annual saving

So if a more efficient appliance costs £120 more but saves £30 per year:

£120 ÷ £30 = 4 years

After four years, the extra purchase cost has been recovered. After that, the appliance is saving money every year.

This is why I think of efficient appliances as small investments rather than luxuries.

Refrigerators: The Appliance That Never Sleeps

Fridges and freezers are some of the most important appliances to get right because they run continuously.

They are not like a kettle, used for a few minutes. They are not like a washing machine, used a few times a week. They are on 24 hours a day, 365 days a year.

Energy Saving Trust notes that fridges and freezers are among the longest-lasting appliances in the home and that fridge-freezers typically have a lifespan of around 17 years. It also estimates that choosing an A-rated fridge-freezer over an E-rated one could save around £380 in Great Britain over its 17-year lifetime.

That matters.

A poor fridge choice is not a one-year mistake. It is a mistake that can sit humming in the kitchen for well over a decade.

With fridges and freezers, also remember that size matters. A very large appliance can use more electricity than a smaller one, even if both have the same rating. The best choice is not always the largest appliance with the best-looking label. It is the appliance that is efficient and correctly sized for the household.

Practical tips:

Choose the smallest fridge or freezer that genuinely meets your needs.
Compare kWh per year, not just the rating letter.
Keep fridges and freezers away from ovens, radiators and strong sunlight.
Check door seals regularly.
Do not leave doors open while deciding what to eat.
Keep freezers reasonably full, but not so packed that air cannot circulate.

The best fridge is not the flashiest one. It is the one that quietly does its job efficiently for years.

Freezers: Long-Term Savings in a Cold Box

A freezer can be a very useful green appliance if used properly. It reduces food waste, allows batch cooking, stores garden produce and makes it easier to avoid last-minute supermarket trips.

But it can also become a hidden energy drain.

An old freezer in a garage or utility room can quietly cost a surprising amount, especially if the seals are poor, the thermostat is inaccurate, or ice has built up.

A modern efficient freezer may cost more to buy, but if it uses far fewer kWh per year, the payback can be strong.

For example:

Older or less efficient freezer: 280 kWh per year
Efficient freezer: 170 kWh per year
Saving: 110 kWh per year

At 26.11p per kWh, that saves about £28.72 per year. Over twelve years, that is about £344.64.

If the efficient model costs £100 more, the payback is roughly three and a half years.

That is not just saving electricity. It is reducing long-term household cost.

Washing Machines: Heating Water Is the Expensive Part

Washing machines do not usually run all day, but when they do run, the energy-hungry part is often heating the water.

Energy Saving Trust says that an efficient washing machine can save money on electricity and, for homes on a water meter, water bills too. It estimates that choosing an A-rated washing machine over a D-rated one could save around £100 in Great Britain over an 11-year lifetime.

That saving may not sound dramatic compared with a fridge-freezer, but washing machines also give you behavioural savings.

The machine matters, but so does how you use it.

Practical tips:

Wash at 30°C when suitable.
Run full loads rather than repeated half-loads.
Use eco programmes when time allows.
Spin well before drying clothes.
Avoid using a tumble dryer when outdoor drying is possible.
Clean filters and detergent drawers so the machine works properly.

The most efficient washing machine in the world will still waste energy if it is constantly run half-empty on hot cycles.

Dishwashers: Efficiency, Water and Convenience

Dishwashers are often misunderstood. Some people assume they are automatically wasteful, while others assume they are always better than washing by hand. The truth depends on the machine, the programme, and how it is used.

Energy Saving Trust estimates that almost 8% of a typical electricity bill is spent running the dishwasher. It also says that an A-rated dishwasher can save around £25 per year in Great Britain compared with the lowest-rated dishwasher of the same size, and that efficient models also use less water.

Again, the label matters, but behaviour matters too.

Practical tips:

Run the dishwasher full.
Use the eco programme where practical.
Do not rinse everything under a hot tap first.
Scrape plates instead of pre-washing them.
Choose the right size machine for your household.
Compare kWh per 100 cycles when buying.

A dishwasher used well can save energy, water and time. A dishwasher used badly can do the opposite.

Efficient Appliances Help Solar Homes Even More

For homes with solar panels and batteries, efficient appliances have another advantage.

They make your stored electricity go further.

In our own home, with solar panels and a large battery system, I have become very aware that using less electricity is just as important as generating more. A battery may look enormous on paper, but once you add heat pumps, cooking, washing, refrigeration, computers, lighting and normal family life, stored energy can disappear quickly.

Efficient appliances reduce that drain.

A fridge using 160 kWh per year instead of 300 kWh per year is not just saving grid electricity. It is also leaving more solar-generated power available for other uses. The same applies to efficient dishwashers, washing machines and freezers.

This is an important point in the green energy debate. People often focus on generation: solar panels, wind farms, batteries, heat pumps and electric vehicles. But reducing demand is just as powerful.

The cleanest unit of electricity is still the one you do not need to use.

Cheap Appliances Can Create Hidden Waste

There is also an environmental cost beyond electricity.

A very cheap appliance may use more energy, but it may also be harder to repair, noisier, less durable, less efficient with water, and more likely to be replaced sooner.

That matters because appliances contain steel, plastics, electronics, motors, pumps, refrigerants, wiring, packaging and transport emissions. If a cheap machine fails after six years while a better one lasts twelve, the real environmental cost is not just the electricity. It is the manufacturing, shipping, disposal and replacement cycle.

This does not mean everyone should buy the most expensive appliance. That would be bad advice.

It means we should buy carefully.

Look for efficiency, reliability, repairability, size, warranty, spare parts and actual running costs. A good purchase is not always the cheapest one. It is the one that gives the best value over its whole life.

How to Compare Appliances in the Shop

When comparing appliances, ignore the marketing words at first.

Do not start with “premium”, “smart”, “eco”, “family size” or “energy saving”.

Start with the label.

Ask these questions:

What is the energy rating?
What is the kWh figure?
Is that per year or per 100 cycles?
How big is the appliance?
Is it larger than I need?
How much more does the efficient model cost?
How many years am I likely to keep it?
What is the payback time?
Will it save water as well as electricity?
Can it be repaired?

For a fridge-freezer, compare annual kWh.
For a freezer, compare annual kWh.
For a washing machine, compare kWh per 100 cycles.
For a dishwasher, compare kWh per 100 cycles and water use.

Then do the calculation.

Even a rough calculation is better than guessing.

A Worked Payback Example

Let us compare two dishwashers.

Dishwasher A costs £320 and uses 95 kWh per 100 cycles.
Dishwasher B costs £440 and uses 55 kWh per 100 cycles.

The efficient dishwasher costs £120 more.

If you run the dishwasher 280 times a year, that is 2.8 lots of 100 cycles.

Energy difference:

95 - 55 = 40 kWh per 100 cycles

Annual saving:

40 × 2.8 = 112 kWh per year

Cost saving:

112 × £0.2611 = £29.24 per year

Payback:

£120 ÷ £29.24 = about 4.1 years

If the dishwasher lasts ten years, the efficient model could save nearly £292 in electricity alone. It may also save water.

That makes the higher purchase price look very different.

The Bigger Picture: Efficiency Is a Practical Green Habit

Going green is sometimes presented as dramatic and expensive.

Install solar panels.
Buy an electric car.
Fit a heat pump.
Add battery storage.

Those things can be excellent, but they are not the only route.

Sometimes going green is simply making a better decision when an appliance needs replacing anyway.

A more efficient fridge.
A better freezer.
A washing machine that uses less water and electricity.
A dishwasher that costs less to run.
A habit of reading the label before buying.

These are not glamorous changes, but they are practical ones.

They save money. They reduce waste. They reduce electricity demand. They make renewable energy go further. They also encourage manufacturers to keep improving the products they sell.

Conclusion: The Real Bargain Is the One That Costs Less to Own

The cheapest appliance in the shop is often the most expensive to own.

That does not mean we should ignore purchase price. Budgets matter. But it does mean we should stop pretending that the price label tells the whole story.

The real cost of an appliance is:

Purchase price
Plus electricity
Plus water
Plus maintenance
Plus repairs
Plus replacement
Plus environmental impact

A well-chosen efficient appliance can quietly save money for years. It can reduce your household’s energy demand without changing your lifestyle dramatically. It can make solar panels and batteries more useful. It can cut waste and help you think more carefully about the products you bring into your home.

So next time an appliance needs replacing, do not just ask:

“How much does it cost?”

Ask:

“How much will it cost to own?”

That one question could save far more than electricity.