Octopus Intelligent Go vs Octopus Go: Which EV Tariff Saves You More?

Two Tariffs, One Question

Octopus Energy offers two dedicated EV tariffs for UK drivers: Intelligent Go and Octopus Go. Both promise cheap overnight electricity for home charging, but they work quite differently under the bonnet. One talks to your car. The other just gives you a cheap window and lets you sort the rest.

If you're trying to decide between them, this is the comparison you need. We'll cover rates, off-peak hours, smart features, compatible chargers, and which tariff actually saves you more money across a year of real-world driving.

For a broader look at all UK EV tariffs, see our full tariff comparison page or our roundup of the best EV charging tariffs for 2026.

Side-by-Side Rate Comparison

Here's how the two tariffs stack up on the key numbers:

The headline difference: Intelligent Go is 1.5p/kWh cheaper off-peak and gives you one extra hour of cheap electricity each night. Over a year of charging, that gap adds up.

Off-Peak Windows: 6 Hours vs 5 Hours

The off-peak window matters more than most people think. It determines how much energy you can actually draw at the cheap rate each night.

Intelligent Go runs from 11:30pm to 5:30am -- a full 6 hours. At 7 kW, that's up to 42 kWh of cheap electricity per night, enough to add roughly 145 miles of range.

Octopus Go runs from 12:30am to 5:30am -- 5 hours. At 7 kW, that's up to 35 kWh per night, or about 120 miles of range.

For most daily commuters, both windows are more than adequate. The average UK driver covers about 20-30 miles per day, which requires only 7-10 kWh of charging -- well within either window. But if you regularly drive 80+ miles per day, or if you want to run other appliances (washing machine, dishwasher, immersion heater) during off-peak hours, Intelligent Go's extra hour gives you meaningful breathing room.

There's another advantage to Intelligent Go that doesn't show up in the table: bonus off-peak slots. Octopus occasionally unlocks additional cheap-rate periods during the day when there's excess renewable energy on the grid. These bonus slots are only available to Intelligent Go customers and can save you even more if you happen to be home to take advantage of them.

Smart Scheduling vs Simple Timer

This is the fundamental difference between the two tariffs, and it's worth understanding properly.

Intelligent Go: Your Car Talks to Octopus

Intelligent Go integrates directly with your vehicle's API. For Tesla owners, this means Octopus communicates with your car through the Tesla API -- you connect your Tesla account in the Octopus app, and the system takes over.

You tell Octopus what time you need the car ready and what charge level you want. The system then schedules charging within the off-peak window automatically. If there's excess grid capacity, it might start charging earlier or unlock bonus cheap-rate periods outside the standard window.

The key benefit: you don't need to think about it. Plug in when you get home, set your target, and Octopus handles the rest. The car won't draw power at peak rates unless you explicitly override it.

This also means your charger doesn't need to be smart. The intelligence sits in the vehicle-to-Octopus connection, not the charger hardware. A basic untethered unit works just as well as a top-of-the-range smart charger -- the Tesla Wall Connector is a popular pairing precisely because the tariff handles the scheduling.

Octopus Go: Set a Timer and Forget

Octopus Go is simpler. You get a 5-hour off-peak window, and it's your job to make sure charging happens during that window. There's no vehicle API integration and no smart scheduling from Octopus's side.

In practice, this means you either:

• Set a timer on your charger -- smart chargers like the Ohme Home Pro let you schedule charging sessions in the app
• Set a timer on your car -- Tesla's built-in scheduled charging feature works perfectly for this
• Manually start charging after 12:30am (not recommended for obvious reasons)

Most people set it once and never touch it again. It's not complicated -- but it does require a charger or car that supports scheduling.

Vehicle and Charger Compatibility

Intelligent Go

Intelligent Go requires a compatible EV because it relies on the vehicle API. Tesla models are fully supported, along with a growing list of other EVs (check the Octopus app for the latest). If your car isn't on the compatible list, you can't use Intelligent Go -- you'll need to go with Octopus Go or another tariff.

On the charger side, any charger works. Since Octopus controls charging through the car, the charger is just a power delivery device. The Tesla Wall Connector at £425 is a natural choice for Tesla owners, but even a basic granny charger would technically work (albeit slowly).

Octopus Go

Octopus Go works with any EV and any charger. There are no compatibility requirements because there's no API integration -- you're just scheduling around a fixed off-peak window.

If you want the most control, a smart charger like the Ohme Home Pro at £535 is ideal. It can automatically align charging sessions with your off-peak window and even integrates with Octopus to pull your tariff rates directly, showing you exactly what each session costs.

Annual Cost Comparison: 10,000 Miles

Let's put real numbers on this. Assuming a typical UK driver doing 10,000 miles per year in a Tesla Model 3 or Model Y (efficiency of approximately 3.5 miles per kWh), here's what each tariff costs for home charging:

Intelligent Go saves approximately £43 per year on charging costs alone for a 10,000-mile driver. Over a typical 3-year ownership period, that's roughly £130 -- not life-changing, but not nothing either.

For context, both tariffs are dramatically cheaper than charging on a standard variable tariff (approximately £800/year at ~28p/kWh) or relying on Superchargers (approximately £1,200/year at ~40p/kWh). The real saving is switching to either EV tariff from a standard rate -- the gap between Intelligent Go and Go is relatively modest by comparison.

For a full breakdown of EV running costs across all tariffs, see our UK EV Charging Cost Index.

Which Tariff Is Better for You?

Choose Intelligent Go If:

• You drive a Tesla or other compatible EV -- the API integration is genuinely useful and removes all charging friction
• You want a completely hands-off experience -- plug in, walk away, wake up to a charged car
• You want the cheapest possible rate -- 7p/kWh is hard to beat
• You'd benefit from bonus off-peak slots -- if you work from home or have flexible hours, the occasional daytime cheap-rate period is a nice bonus
• You don't want to buy a smart charger -- since the intelligence is in the vehicle API, you can pair it with a basic (and cheaper) charger

Choose Octopus Go If:

• Your EV isn't compatible with Intelligent Go -- if your car isn't on the supported list, Go is the obvious alternative
• You prefer manual control -- some people like setting their own schedule rather than handing it to an algorithm
• You already own a smart charger -- if you have an Ohme Home Pro or similar, it can handle the scheduling natively
• You want tariff-agnostic flexibility -- Octopus Go's simplicity means you could switch to any other time-of-use tariff in the future without changing your setup

Consider Octopus Agile Instead If:

• You're comfortable with variable pricing -- Octopus Agile offers half-hourly rates that can drop below 0p during periods of high renewable generation
• You have a smart charger and enjoy optimising -- Agile rewards active management and can undercut both Go tariffs on the best days
• You have solar panels -- Agile's export rates and variable import rates can work well alongside a solar and battery setup

The Verdict

For most Tesla owners, Intelligent Go is the better tariff. The lower off-peak rate, longer off-peak window, bonus cheap-rate slots, and seamless vehicle API integration make it the more complete package. You save approximately £40-50 per year compared to Octopus Go, and the charging experience is genuinely effortless.

Octopus Go remains an excellent tariff -- and it's the right choice if your EV isn't compatible with Intelligent Go or if you prefer a simpler, more transparent setup. At 8.5p/kWh off-peak, it's still one of the cheapest ways to charge at home in the UK, and it works with every EV and charger on the market.

Either way, the most important step is switching away from a standard variable tariff. Whether you pick Intelligent Go or Go, you'll cut your annual charging costs by £500-600 compared to paying the standard rate.

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