If you’ve got an electric car and you’re still on a standard flat-rate electricity tariff, you’re almost certainly overpaying. The whole economics of driving electric hinge on charging overnight, cheaply, when the grid has excess capacity. Smart EV tariffs are built specifically for this — and the savings are significant enough that switching is one of the first things you should do after buying an EV.

Here’s what the main options look like in 2026, how they actually work, and what you need to get started.

How smart EV tariffs work

Standard electricity tariffs charge you the same rate per unit (pence per kWh) regardless of when you use power. That’s fine for general household use. It’s not optimised for EV charging, which is large, predictable, and flexible — you don’t care whether your car charges between midnight and 4am, as long as it’s ready in the morning.

Smart tariffs take advantage of that flexibility. In exchange for shifting your car’s charging to off-peak periods (typically overnight), you get access to significantly cheaper rates during those windows. The rest of your home electricity use stays at a standard daytime rate.

The “smart” part is important. These aren’t just time-of-use tariffs where you manually schedule charging. The better ones integrate directly with your car or charger, so the supplier’s system controls when charging happens automatically, within parameters you set. You tell it “I want the car ready by 7am with at least 80% charge” and it handles the rest, scheduling charging to use the cheapest overnight windows.

Octopus Intelligent

Octopus Intelligent is the market leader and the one most EV drivers end up recommending. The headline rate has varied over the past year, but overnight off-peak charging is currently available at around 7-9p/kWh (check the current rate on the Octopus website — it adjusts with wholesale prices). Daytime rates are higher, broadly in line with Octopus Go or standard tariffs.

The off-peak window is 11pm to 5am, but with Intelligent specifically, Octopus can also shift extra charging outside this fixed window based on real-time grid conditions. If the grid is running on surplus renewable energy at 9pm, Intelligent can start charging early and give you the cheap rate for that session too. Over time, this means you capture more cheap-rate hours than the fixed 6-hour window alone.

Compatibility is the main gotcha. Octopus Intelligent works by integrating directly with your car (via its API or the Octopus app) or with a compatible smart charger. The compatible car list is substantial — most Teslas, Volkswagen Group EVs, Hyundai/Kia, BMW, and a growing number of others. If your car isn’t on the list, you can still use a compatible smart charger (Ohme, Indra, and Hypervolt smart chargers work with Intelligent independent of car model).

Setup is straightforward. You add your car to the Octopus app, grant permission for Octopus to communicate with it, set your charge preferences, and it takes over. Most people report the setup taking 15-20 minutes.

OVO Drive Anytime

OVO Drive Anytime takes a different approach. Rather than a cheaper overnight window, it offers a rebate model: you earn money back (currently around 6p/kWh) every time you charge your EV at home. The rebate shows up on your bill, effectively reducing the cost of all EV charging regardless of time of day.

The practical difference: with Intelligent, you save money by charging at the right time. With Drive Anytime, you save money on all EV charging but the absolute rate isn’t as low during the cheap overnight windows.

Drive Anytime currently works with VW Group cars, Ford Mustang Mach-E, and a small number of compatible smart chargers. The vehicle compatibility list is narrower than Octopus Intelligent, which limits its audience somewhat.

It’s worth running the numbers for your specific usage. If you charge primarily overnight anyway (which most EV drivers do), Octopus Intelligent typically wins on absolute cost. If you have a less predictable charging pattern, Drive Anytime’s always-on rebate structure can be simpler to manage.

British Gas Electric Driver and E.ON Next Drive

British Gas Electric Driver and E.ON Next Drive are two more options worth knowing about, particularly if you’re already a customer with those suppliers and prefer to consolidate everything.

British Gas Electric Driver offers off-peak charging windows with rates around 8-10p/kWh overnight, with compatibility requiring either a smart charger or an app-connected vehicle. The integration works through the Hive app if you’re already using that ecosystem.

E.ON Next Drive is structured similarly — overnight off-peak rates with smart charger integration. Worth getting a quote if you’re already an E.ON customer, as the switching process is marginally simpler than moving supplier entirely.

Neither matches Octopus Intelligent for pure-rate cheapness or breadth of compatibility, but both are solid options if you value having all your energy and smart home stuff with one provider.

What you actually need to sign up

Before you switch, check three things:

1. Car compatibility. Go to the tariff provider’s website and look for their compatibility list. Octopus has the most comprehensive one. If your car isn’t on it, check whether a compatible smart charger would cover you.

2. Smart meter. All of these tariffs require a smart meter (SMETS2 specifically). If you don’t have one, request one from your current supplier first — installation is free and takes an engineer visit of about an hour. Allow a few weeks for scheduling.

3. Home charger vs three-pin plug. You can technically charge on a three-pin plug, but most smart tariffs work best with a dedicated home EV charger. If you’re using a three-pin plug, smart scheduling is usually done through the car’s own timer rather than through the charger, and some tariff integrations may not work properly.

What the savings look like

Rough numbers: a typical EV with a 60kWh usable battery, driven around 8,000-10,000 miles per year, uses roughly 2,000-2,500kWh annually for charging. At a standard daytime rate of around 24p/kWh (approximate mid-2026 rate, varies by tariff), that’s £480-600/year in charging costs. At 7-9p/kWh overnight on Octopus Intelligent, the same usage costs £140-225/year.

That’s a £250-400/year saving compared to charging on a standard tariff. Against the typical cost of fuel in a comparable petrol car (roughly £1,500-2,000/year), the economics of an EV look considerably better once you’ve optimised your charging.

One caveat: your daytime electricity rate matters too. Smart EV tariffs have higher daytime rates than standard fixed tariffs. If you use a lot of electricity during the day — working from home, using high-draw appliances in the afternoon — the daytime premium can offset some of the overnight savings. Run a comparison based on your actual usage pattern before switching.

Solar and EV together

If you have rooftop solar, the picture gets more interesting. Some Octopus Intelligent customers combine the tariff with solar, using daytime generation for home consumption and overnight off-peak for topping up the car. Octopus’s Intelligent Flux tariff is specifically designed for homes with solar and batteries, offering both cheap overnight import and paid export for excess generation.

Coordinating solar generation, battery storage, and EV charging on a single smart tariff is something home energy management systems (HEMS) are designed for — if you’ve invested in that setup, it’s worth checking whether your HEMS integrates with your chosen EV tariff.

Switching is straightforward

The supplier switch process in the UK is handled through the standard Energy Switch process — you sign up with the new supplier and they handle the switch with your current supplier. You shouldn’t lose supply. The main lead time is on the smart meter side if you don’t have one yet.

Given the potential annual savings, it’s one of the more impactful things an EV owner can do that doesn’t require any hardware investment.