The baseline: what smart EV charging on Agile looks like
Smart EV charging on Agile follows a simple daily rhythm once you understand the system. Octopus publishes the next day's half-hourly prices at around 4-5pm each afternoon. By 9pm, tonight's full overnight picture is visible on any Agile price tracker.
The approach that experienced Agile EV drivers use looks like this: check prices around 9pm, identify the cheapest two to three hour window overnight, and set the car to start charging then. The result is typically a full charge for £2-4 depending on battery size. A Tesla Model 3 (60kWh battery) costs around £2.40 at 4p/kWh. A Nissan Leaf (40kWh) costs around £1.60. A VW ID.4 (77kWh) costs around £3.08.
Compared to charging at the July 2026 Ofgem price cap rate of 26.11p/kWh, that Leaf charge drops from £10.45 to £1.60. That's a saving of £8.85 on a single charge. Do that 100 times a year and you've saved £885 on just the Leaf. The numbers compound quickly.
Method 1: manual scheduling using AgileAlert
This is the simplest starting point and the one most drivers use when they first join Agile. It takes under a minute each evening and requires no additional hardware.
Step 1: Open AgileAlert's live price dashboard at around 9pm.
Step 2: Look at overnight prices from 10pm through to 7am. The cheapest window is usually somewhere between 1am and 5am, but it varies significantly from night to night based on wind generation and overnight demand patterns.
Step 3: Note the start time of the cheapest window. If the lowest prices run from 2:30am to 5:00am, you want your car to start charging around 2:30am.
Step 4: Set your car's scheduled charging time to match. Most modern EVs allow this via their smartphone app. You can typically set both a start time and a departure time (which ensures the charge finishes before you leave).
That's the complete routine. On a typical night, you'll spend 45-60 seconds on this. Over a year, those seconds translate to £400-600 in savings compared to charging at the standard price cap rate.
Method 2: smart charger integration with automatic Agile response
If even 60 seconds per evening sounds like more effort than you want to commit, a smart charger removes the daily step entirely.
The OHME Home Pro is the market leader for Agile integration in the UK. Once you link your OHME charger to your Octopus account, it reads live Agile prices directly and automatically schedules your car's charge within the cheapest available half-hour slots before your departure time. You set your departure time once. The charger does the rest every single night.
On a night when the cheapest slot is 2:30am at 2.1p/kWh, OHME charges your car at 2:30am. If a plunge pricing event drops prices to -20p/kWh at midnight, OHME starts charging immediately and earns you money for doing so. The system is genuinely hands-free after the initial setup.
OHME Home Pro costs around £400-500 installed. At Agile EV savings of £400-600 per year for a typical 10,000-mile driver, the payback period is roughly one year. For a 20,000-mile driver saving £700-1,000 annually, it's even shorter.
The Zappi charger from myenergi is an alternative worth considering if you also have solar panels. It prioritises solar generation during the day and falls back to cheap Agile rates overnight, combining two sources of free or near-free electricity for your EV.
Method 3: Intelligent Octopus
Intelligent Octopus (also called Intelligent Go) is Octopus Energy's dedicated EV tariff, separate from the standard Agile tariff. It's worth understanding because some EV owners consider it instead of Agile.
With Intelligent Octopus, you connect a compatible EV or smart charger to your Octopus account. The system automatically charges your car during a guaranteed cheap window (typically 6 hours overnight at around 7-8p/kWh). No daily checking, no manual scheduling, complete automation from day one.
The tradeoff: Intelligent Go's fixed overnight rate of around 7-8p/kWh is higher than the average overnight Agile rate of 3-6p/kWh. You also miss plunge pricing events. For a 10,000-mile driver, the annual difference between Agile and Intelligent Go can be £150-250.
Intelligent Go requires a compatible vehicle or charger from Octopus's approved list. Not all EVs qualify. If your car isn't on the list, Agile with manual or smart charger scheduling is your route to cheap EV charging.
Combining methods: departure time plus AgileAlert plus smart charger
The most capable setup combines all three elements. Set your departure time in your EV app so the car knows its deadline. Use a smart charger (OHME or similar) to automatically select the cheapest slots within the overnight window. Check AgileAlert occasionally to stay aware of what's happening with prices and to catch exceptional plunge events.
This layered approach means: you never miss a cheap window (smart charger handles it), you never miss a plunge event (smart charger detects and responds), and you stay informed about price patterns (AgileAlert gives you the bigger picture). It's the system that maximises both savings and awareness.
For most drivers, the smart charger layer is the key addition. The manual AgileAlert check remains valuable for occasional nights when you want to override the default schedule, perhaps because wind conditions suggest an unusually cheap night and you want to make sure the charger starts at the absolute lowest moment.
What to do on a plunge pricing night
Plunge pricing events happen when overnight wind generation surges and grid demand falls simultaneously. Prices go negative, meaning Octopus pays you for every unit you consume. These events happen five to ten times per month on average and represent the most dramatic savings available on the Agile tariff.
If you're using a smart charger with native Agile integration, plunge pricing is handled automatically. The charger detects negative prices and charges your car immediately, regardless of any scheduled start time you've set.
If you're using manual scheduling, you need to spot plunge events yourself. Check AgileAlert around 9-10pm on evenings when the UK weather forecast shows strong overnight wind across multiple regions. When you see negative prices forecast, override your scheduled start time and set the car to charge now or as soon as possible within the plunge window.
The maths make plunge pricing events worth prioritising. A 60kWh charge at -14p/kWh generates an £8.40 credit on your bill. That's money added to your account for consuming electricity. On a 77kWh battery at -14p/kWh, the credit reaches £10.78. These are not theoretical figures. They appear as real credits on real Octopus bills every month.