The minimum viable Agile setup (costs £0, takes 5 minutes)
Here is everything you actually need to start saving money on Octopus Agile:
- A phone with a browser.
- The AgileAlert website bookmarked.
- An awareness of which appliances in your home have a delay-start button.
That is the entire list. No Amazon Echo, no smart plugs, no Home Assistant server, no IFTTT account, no API key. Just a browser and a delay-start button.
Here is why this works. Octopus Agile prices follow a predictable daily pattern in every UK region. Prices peak between 4pm and 7pm (when demand is highest) and fall overnight (when demand is lowest and wind generation is often strong). The July 2026 Ofgem price cap sets the baseline at 26.11p per kWh. Agile overnight rates regularly hit 3p to 8p. The ratio between peak and overnight is 8-to-20 times.
You do not need automation to act on that difference. You need one piece of information (when is tonight's cheapest window?) and one habit (set appliances to run during that window). The information comes from the live price chart. The habit takes about a week to form.
If you do absolutely nothing beyond this and run your washing machine, dishwasher, and tumble dryer overnight instead of at peak, you save £150 to £250 per year. Zero setup cost. Zero ongoing maintenance.
The 60-second evening routine that saves £300/year
This is the core habit that separates active Agile savers from passive ones. It takes 60 seconds and you do it every evening before bed.
Step 1 (15 seconds): Open the AgileAlert price chart on your phone. Look at the overnight section. Identify the cheapest 3-hour window, usually somewhere between 11pm and 7am.
Step 2 (30 seconds): Set delay start on any appliances you want to run overnight. Washing machine, dishwasher, tumble dryer. Most machines let you set a start time or a delay in hours. Set them to run during your identified cheap window.
Step 3 (15 seconds): Note if tomorrow's prices look unusually high (cold snap, grid stress) or unusually cheap (high wind forecast). Adjust anything you had planned for tomorrow accordingly.
Done. 60 seconds.
The maths behind the £300/year figure: a 40-degree washing machine cycle uses about 2 kWh. Running it at 38p peak costs 76p. Running it at 4p overnight costs 8p. That is 68p saved per wash. Run five washes per week and you save £177/year from washing alone. Add a dishwasher at similar savings (typical dishwasher: 1.2 kWh per cycle) and you cross £300/year without touching anything else.
Octopus Energy's own data puts the average saving for active Agile users at £440/year. The 60-second routine captures most of that without any technology investment beyond the phone in your pocket.
The one smart plug worth buying (£12, pays back in weeks)
If you want to invest at all, buy one smart plug before anything else. The TP-Link Kasa EP10 or the Meross MSS210 both cost around £12 and both work with your phone without needing any hub or bridge.
Connect this plug to your dehumidifier, air purifier, or any other appliance that is safe to run unattended. Then use the plug's own scheduling app to set it to run between midnight and 6am every night.
You do not need IFTTT or Home Assistant for this. Every smart plug comes with its own app that includes a basic scheduler. Set the schedule once to run during your typical overnight cheap window. Forget about it. The plug handles it from then on.
A dehumidifier running for 6 hours per night at 4p rather than 26p saves around £80 per year depending on its wattage. The £12 plug pays for itself in about 7 weeks. That is a 700% annual return on investment.
If you want to upgrade later to a more sophisticated system where the plug responds to live prices rather than a fixed schedule, you can connect the same plug to IFTTT or Home Assistant. The plug itself is not wasted. The £12 is a foundation, not a dead end.
Delay start settings for the 8 most common appliances
Every appliance with a delay-start function is a free Agile automation tool. Here is how to use each one:
| Appliance | How to set delay start | Target window | Annual saving (est.) |
|---|---|---|---|
| Washing machine | Delay start button or time dial on fascia | 1am to 6am | £120 to £180 |
| Dishwasher | Delay button (most show 1h/2h/3h or direct time) | 12am to 5am | £60 to £90 |
| Tumble dryer | Delay start or programmable timer | 12am to 6am | £80 to £130 |
| Immersion heater | Mechanical or digital timer on cylinder | 2am to 5am | £100 to £160 |
| Slow cooker | Socket timer (£5) or smart plug | 6am to 10am | £20 to £35 |
| EV (basic timer) | Charging schedule in car menu or charger app | 12am to 7am | £200 to £600 |
| Bread maker | Delay start on machine fascia | 5am to 8am | £10 to £20 |
| Air fryer (if timer model) | Mechanical dial timer | Not applicable (needs supervision) | N/A |
The immersion heater entry deserves special attention. If your home has an immersion heater (a hot water cylinder with an electric element), it is almost certainly your highest single-appliance saving opportunity. A 3kW immersion running for 2 hours costs £2.28 at peak (38p/kWh) and 24p at 4p overnight. That is a £2.04 daily saving if you currently heat water at peak. Over a year: over £700. A £5 mechanical plug-in timer from any DIY shop applied directly to the immersion circuit achieves this with zero technology.
When to upgrade: the point at which more automation makes sense
The lazy approach works well for households with standard usage patterns and no EV or home battery. At some point, the effort-to-saving ratio shifts and upgrading makes sense. Here are the three triggers:
You get an EV: EV charging is the single highest-value flexible load in most households. A 60kWh battery charged fully at 4p costs £2.40. Charged at 38p, it costs £22.80. The annual difference for a driver who charges primarily at home is enormous: £500 to £1,000+ depending on mileage. At that level of saving, an automated charging setup using Ohme, Zappi, or Home Assistant earns back its cost in a few months.
You install solar or a battery: The combination of solar generation, a home battery, and Agile tariff creates a triple arbitrage opportunity that requires automation to fully exploit. Charge the battery on cheap overnight Agile, use solar during the day, discharge during peak. This is the setup that delivers the headline £600+ annual savings quoted by advanced Agile users.
The 60-second routine feels like friction: If you find yourself checking prices every day and wishing it happened automatically, that is the signal that Home Assistant or IFTTT is worth the setup time. The transition from manual to automated is a natural progression and the lazy approach described here is a productive stepping stone, not a permanent stopping point.
The people saving £600/year: what they actually do differently
AgileAlert has observed the habits of the most successful Agile users through community research and Octopus Energy's published data. The £600/year savers are not fundamentally different from you. They simply do more of the same things, applied to more flexible loads.
The key variables that separate £200/year savers from £600/year savers:
- EV ownership: The single biggest separator. EV charging at cheap Agile rates generates £300 to £800/year in fuel savings versus petrol and versus peak electricity.
- Immersion heater or heat pump: High-power thermal loads benefit enormously from overnight cheap rates. Households with these typically save £200 to £400/year from them alone.
- Home battery: Arbitrage between cheap overnight charging and peak discharge is worth £300 to £500/year for a well-managed 10kWh battery. Requires automation to do properly.
- Consistency: The people saving £600/year are not doing anything dramatically different each day. They built habits and automations once and they run reliably every day without requiring decisions.
The practical upshot: if you have an EV or a heat pump, the lazy approach is worth upgrading. If your flexible loads are household appliances only, the 60-second routine and one smart plug deliver most of the available value. There is no shame in the lazy approach. It is rational, effective, and costs nothing.
Start tonight. Check the live price chart, identify the cheapest window, set your washing machine delay start, and put the phone down. You have just made the most cost-effective energy decision available to you.