The kitchen appliances worth timing -- and the ones you can't
The first thing to understand about the Agile kitchen is the distinction between appliances you can schedule and appliances that are either instant-use or always-on. Timing only works where there is a delay possible between your decision to use something and when it actually needs to run.
Here is the clear split:
| Appliance | Can you time it? | Why |
|---|---|---|
| Dishwasher | Yes | Delay start built into almost every model made since 2010 |
| Slow cooker | Yes | Runs overnight unattended by design |
| Bread maker | Yes | Built-in delay timer allows overnight baking |
| Rice cooker / multi-cooker | Sometimes | Many models have a delay start function |
| Kettle | No | Instantaneous use -- you need it now |
| Toaster | No | Instantaneous use |
| Microwave | No | Instantaneous use, very low wattage per use anyway |
| Fridge / freezer | No | Always on by necessity -- but optimisable |
| Oven | Rarely | You need food cooked at specific mealtimes |
| Air fryer | Rarely | Fast cooking at mealtimes |
The two that matter most for overnight timing are the dishwasher and the slow cooker. Between them, they account for the bulk of kitchen Agile savings. Start there. Master those. Everything else is about choosing the most efficient appliance when you need to cook right now.
The slow cooker revelation: cook overnight, save all year
The slow cooker is one of the most misunderstood appliances in UK kitchens. People think of it as a weekend convenience device. On Agile, it is a money machine.
A typical slow cooker draws between 150 and 300 watts. Over an 8-hour cooking session, it uses somewhere between 1.2 and 2.4kWh of electricity. Compare that to an electric oven, which draws 2,000-2,500 watts and uses 2-3kWh in a single hour.
Now apply Agile pricing. Start your slow cooker at midnight. At a typical overnight Agile rate of 3p/kWh, an 8-hour slow cook costs: 0.2kWh average per hour, times 8 hours, times 3p equals 4.8p total. Less than 5p to cook an entire meal.
The contrast with a peak-time oven is brutal. Running a 2kWh oven for 90 minutes at 7pm at 35p/kWh costs: 3kWh times 35p equals £1.05. Same meal, same day, completely different cost. The slow cooker at midnight costs 4.8p. The oven at 7pm costs 105p. That is a saving of exactly £1 per meal.
Do that three times a week for a year and you save £156 annually from that one habit shift. That is a slow cooker that pays for itself many times over. That is a round of drinks every month, for doing nothing different except starting dinner while you watch television and eating it the following lunchtime or the next evening.
How to set up the overnight slow cooker routine
The practical pattern is simple: prepare your ingredients in the evening, load the slow cooker, and set it to start at 11pm or midnight. By 7-8am, the meal is cooked and ready. It will hold temperature on the "Keep Warm" setting until you eat.
Almost any one-pot meal works: stews, curries, soups, pulled meat, porridge, lentil dishes, bean casseroles. Recipes designed for slow cookers are overwhelmingly suited to overnight timing -- the long cooking time is a feature, not a problem. There are thousands of "overnight slow cooker" recipes online. The habit of loading the slow cooker after dinner the night before is one of the highest-return cooking habits you can develop.
If your slow cooker does not have a built-in timer (many older models do not), a plug-in mechanical timer costs under £5 from any hardware shop. Set it to turn the cooker on at midnight and off 8 hours later. Done.
Air fryer vs oven vs microwave: the real cost hierarchy
For meals you cook at normal mealtimes, appliance choice matters a great deal more than timing. Here is the honest cost hierarchy for cooking a typical portion:
| Appliance | Typical wattage | Time per portion | kWh used | Cost at 15p/kWh (Agile daytime) | Cost at 35p/kWh (peak) |
|---|---|---|---|---|---|
| Microwave | 900W | 5 mins | 0.075 | 1.1p | 2.6p |
| Air fryer | 1,500W | 20 mins | 0.5 | 7.5p | 17.5p |
| Induction hob | 2,000W | 15 mins | 0.5 | 7.5p | 17.5p |
| Electric fan oven | 2,000W | 30 mins | 1.0 | 15p | 35p |
| Electric conventional oven | 2,500W | 45 mins | 1.9 | 28.5p | 66.5p |
The microwave wins on pure efficiency for anything it can cook. An air fryer and an induction hob are closely matched for most cooking tasks. A conventional electric oven is consistently the most expensive option, primarily because it heats a large empty cavity for a long time.
The practical implication for Agile households is straightforward: when you need to cook at mealtimes, reach for the air fryer or induction hob before the oven. Reserve the oven for occasions that genuinely require it -- roasting large joints, baking bread, cooking for a crowd. For everyday meals, the air fryer cuts cooking cost by 50-60% compared to a conventional oven, and that saving applies every single evening regardless of whether you are on Agile.
If you are still using a conventional electric oven as your primary cooking method, switching to an air fryer for everyday cooking saves approximately £60-80 per year in electricity alone. The air fryer also preheats in 2-3 minutes versus 15-20 minutes for an oven, which compounds the saving further.
Induction vs gas vs electric: which costs least on Agile
This question has a clear answer in 2026 that surprises many households: on Octopus Agile during overnight windows, induction cooking is the cheapest hob cooking available in the UK. By a significant margin.
Gas hobs are approximately 50% energy efficient: roughly half the heat from the flame goes into the food or the pan, and half is lost to the surrounding air. Electric ceramic hobs are around 70% efficient. Induction hobs are 85-90% efficient because they generate heat directly in the base of the pan rather than via a flame or a glowing element.
The comparison over a full year for a household cooking a main meal on the hob six evenings a week:
| Hob type | Annual energy cost (2026 rates) | Notes |
|---|---|---|
| Gas hob | ~£120/year | At current gas unit rate of ~7p/kWh, assuming 50% efficiency |
| Electric ceramic hob (peak) | ~£200/year | At 30p/kWh average, 70% efficiency |
| Induction hob (peak) | ~£140/year | At 30p/kWh average, 90% efficiency |
| Induction hob (Agile overnight 3p/kWh) | ~£14/year | Not realistic for all cooking, but shows the extreme saving |
| Induction hob (Agile average 15p/kWh) | ~£70/year | Practical estimate for Agile household timing most meals off-peak |
The headline finding: an Agile household using an induction hob and making a reasonable effort to cook outside peak hours can spend less on cooking than a gas household, despite electricity costing more per kWh than gas on a standard tariff. The efficiency gap and the Agile price advantage combine to flip the economics entirely.
This matters for households considering switching away from gas. The conventional wisdom says gas is always cheaper to cook with than electricity. On Agile with an induction hob, that is no longer true.
The fridge and freezer: constant draws you can still optimise
Your fridge and freezer run 24 hours a day, seven days a week. You cannot time them. But there are three things you can do that together save meaningful money:
Set the correct temperature
A fridge should be set to 3-5°C. A freezer to -18°C. These are the temperatures that keep food safe without wasting energy. Every degree colder than necessary increases energy consumption by approximately 5%. A fridge set to 1°C instead of 4°C uses 15% more electricity -- around £8-12 per year extra for doing nothing useful. Check both thermometers with an inexpensive fridge thermometer (under £5 online). Adjust if needed.
Keep the freezer full
A full freezer is more energy efficient than an empty one. Frozen food acts as thermal mass, absorbing the warmth that enters when you open the door and maintaining a stable temperature without the compressor running as frequently. If your freezer is half-empty, fill the gaps with bags of ice, bottles of water, or simply fold up some newspaper to fill the space. A full freezer versus a quarter-full freezer can reduce running costs by 10-15%.
Leave space behind the fridge
Fridges and freezers reject heat through coils at the back. If the appliance is pushed hard against the wall with no airflow gap, those coils overheat and the compressor works harder. Leave at least 5cm of clearance behind and above the appliance. Cleaning the dust from the coils annually keeps them working efficiently -- a five-minute task that can reduce running costs by 5-10%.
Combined, these three optimisations can save £15-25 per year on fridge and freezer running costs. Not a transformation, but free money for a one-off check and a temperature adjustment.
Coffee machines and hidden standby costs
The coffee machine is perhaps the most overlooked energy waster in the UK kitchen. Not because brewing coffee uses much electricity -- it does not. Because most filter coffee machines and some espresso machines are left on for hours after use, keeping a heated plate or boiler warm in case someone wants another cup.
A filter coffee machine with its warming plate active draws around 60-80 watts continuously. Left on for 8 hours per day, that is 0.56-0.64kWh of daily consumption, or around £70-80 per year to keep coffee warm that no one is drinking.
The fix is straightforward: switch the machine off at the wall after your morning coffee. If you have a smart plug, set it to cut power automatically 30 minutes after its scheduled ON time. Your morning routine is unchanged. The phantom consumption disappears.
Other kitchen standby draws worth addressing:
- Microwave display clocks: 2-5 watts continuously. Multiply by 8,760 hours per year -- around £1.50-4 per year each. Unplug when not in use if accessible.
- Instant boiling water taps (Quooker-style): the tank keeps water near boiling continuously, drawing 10-30 watts at idle. Check your model's settings -- most have an eco mode that reduces idle power significantly.
- Wine coolers and drinks fridges: Often set far colder than necessary. Check the temperature and raise it if the contents allow.
Standby reductions are not the transformative saving that appliance timing is. But together they typically save £15-30 per year, and most require nothing more than a switch-off habit change.
A day in the Agile kitchen: the daily routine
What does the Agile kitchen actually look like in practice? Here is a realistic daily routine that captures most of the available savings without changing what you eat or when you eat it:
8am: The slow cooker completes its overnight run. Tonight's stew is ready. Portion it into containers for lunch and dinner. The total electricity cost for that meal: 4.8p.
Morning: Make coffee. Switch the machine off at the wall after use. The warming plate never stays on.
Lunchtime: Reheat the slow-cooked stew in the microwave. 90 seconds. 1.1p.
5pm: Load the dishwasher after the day's dishes. Do not press Start. Press Delay. Set it to begin at midnight. Check AgileAlert for tonight's cheapest 2-hour window and adjust the delay setting to match if it falls outside the midnight slot.
6pm: Cook dinner using the air fryer or induction hob rather than the conventional oven. For a family of four, a chicken traybake in an air fryer costs about 20p in electricity. The same meal in a conventional oven at peak rates costs around £1.10.
9pm: Prepare tomorrow's slow cooker ingredients. Load the pot. Set the timer or plug-in socket timer for midnight or 11pm. Tomorrow's meal is queued.
Midnight: The dishwasher starts automatically, running its cycle for 6-8p. The slow cooker starts, gently cooking overnight for under 5p. You are asleep. Your kitchen is working for you at 3p/kWh.
This is the complete Agile kitchen routine. It takes about 10 minutes of active effort per day, spread across small moments. Nothing changes about what you eat. Nothing changes about when you eat. But the electricity cost of running your kitchen shifts dramatically.
Annual savings from kitchen changes alone
Pulled together, here is the annual saving picture for a typical UK household that adopts all of the strategies above:
| Change | Annual saving |
|---|---|
| Dishwasher timing: overnight vs 7pm daily | £65-80 |
| Slow cooker 3x/week vs oven at peak | £50-80 |
| Air fryer vs conventional oven for everyday cooking | £60-80 |
| Coffee machine standby elimination | £70-80 |
| Fridge/freezer temperature optimisation | £15-25 |
| Induction hob replacing electric ceramic hob | £30-60 |
| Total annual kitchen saving | £290-405 |
The conservative end of that range -- around £150-180 from the two most impactful changes alone (dishwasher timing and slow cooker use) -- requires no new appliances and no capital outlay. Just a timer setting on the dishwasher and a habit of loading the slow cooker the night before.
The higher end of the range, approaching £400, comes from also switching to an air fryer, addressing standby consumption, and optimising fridge settings. Each of those is a one-time action or a minor habit shift.
£400 per year from the kitchen alone. That is the monthly equivalent of a short city break. That is what "cooking smart on Agile" actually means in pounds and pence, not theory.
And this is only the kitchen. Add the washing machine, tumble dryer, and immersion heater to the same overnight timing strategy, and the full household Agile saving for an engaged household easily exceeds £600-800 per year. The kitchen is where many people start, because it is visible, daily, and immediate.
Agile electricity rewards engagement. Check AgileAlert tonight for your region's cheapest window. Set the dishwasher. Load the slow cooker. The saving starts tomorrow morning.