OctoTariffs

Household decision guide

Best Octopus tariff for an EV: what to compare

Compare Go, Intelligent Octopus Go and Agile for home EV charging, including compatibility, charging windows, effort and export pairing.

Edited by Rob Gibbs. Guidance reviewed: .

Methodology · Corrections

Short answer

There is no universal EV winner. Intelligent Octopus Go can fit a compatible car or charger when you want supplier-managed charging; Go offers a repeatable overnight window; Agile can suit households willing to follow changing half-hourly prices. Your mileage, home charging power, deadline and daytime household use can reverse the result.

Who this is for: Drivers who charge an EV at home and want to compare public household rate structures before checking an Octopus quote.

Fit check

good fit

Good fit: regular home charging

A compatible setup, predictable plug-in routine and enough overnight hours make the managed or fixed-window EV tariffs easier to use.

poor fit

Poor fit: little home charging

If most charging happens publicly or annual mileage is low, a higher day rate can outweigh the value of a cheap EV window.

verify first

Verify first: device integration

Confirm the exact vehicle or charger, smart-meter data flow, export pairing and the charging deadline Octopus can support.

How to compare in practice

  1. Step 1

    Build a whole-home baseline

    Use at least several representative months of half-hourly import data. Identify EV charging where possible, but keep the rest of the household load in the calculation because a cheap charging window can come with a different day rate.

  2. Step 2

    Rule out options that cannot meet the deadline

    Convert the charge needed into hours using the realistic power available at the car, then check plug-in and departure times. Remove managed products that do not support the exact car or charger before comparing prices.

  3. Step 3

    Replay the same charging need

    Cost the same EV energy and household usage under each eligible tariff, including the standing charge. Test low- and high-mileage months rather than choosing from one unusually cheap night.

Numbers to collect before comparing

Better inputs matter more than a generic winner. Gather these before using a tariff calculator or asking Octopus for an eligibility check.

Home-charged EV energy

Collect monthly or annual kWh delivered at home, not total vehicle mileage alone. Charger or vehicle records can help separate this from public charging.

Charging window and power

Note usual plug-in and departure times, usable charger power, battery size and the typical percentage you need to add.

Non-EV household demand

Export half-hourly smart-meter usage if available, especially consumption during daytime and early-evening periods outside the advertised cheap window.

Equipment and controls

Car and charger compatibility

Intelligent Octopus Go needs a currently supported vehicle or charge point integration. A brand name alone is not enough because models, accounts and integration routes change.

Charging power and deadline

A 7 kW charger can add energy faster than a three-pin connection. Compare the kWh you need with the hours available before assuming an off-peak window can finish the charge.

Meter requirements

Working half-hourly operation matters

Owning a smart meter is not the same as Octopus being able to communicate with it and receive the readings a tariff needs. Confirm the meter, consent and data flow during signup.

Eligibility to verify

Home charging is central

Go and Intelligent Octopus Go are designed for eligible EVs primarily charged at the supplied home. Verify current supplier eligibility and app requirements rather than treating this guide as approval.

Import tariff structures to compare

  • Intelligent Octopus Go

    Managed charging and a defined overnight whole-home rate can reduce scheduling work.

    Watch: Requires a compatible integration and permits Octopus to control eligible charging.

  • Octopus Go

    A repeatable overnight band can suit drivers who prefer to schedule charging themselves.

    Watch: The cheap window may not cover a large recharge at a slow connection.

  • Agile Octopus

    Changing half-hourly rates can reward flexible charging and automation.

    Watch: There is no guaranteed cheap window and high-price periods can offset savings.

Export choices and pairing

  • Outgoing Octopus

    A flat export payment can be simpler for homes with solar.

    Watch: Check current import/export compatibility before choosing either side.

Treat import and export separately

EV charging affects import. Solar export is a separate payment contract, and compatibility rules can constrain the pairing.

Effort and automation

Choose the work you will actually do

Intelligent Go automates eligible charging after setup, Go supports a recurring timer, and Agile usually needs daily prices or automation. Do not price your time at zero.

Price risk

Cheap EV energy is only part of the bill

Compare the day rate and all non-EV consumption as well as the headline off-peak rate. Agile rates can rise or fall every half hour.

Standing charges

Include the daily charge

A low charging rate does not erase the standing charge. Compare annual standing-charge cost alongside unit-rate savings, especially at low mileage.

The answer changes when…

  • Your annual home-charged mileage changes.
  • Your charger power or required departure time changes.
  • A compatible managed integration becomes available or stops working.
  • Your non-EV daytime use is large.

Questions people ask

Does Intelligent Octopus Go make every EV cheaper to run?

No. Eligibility, charging location, mileage, charging power and the rest of the home load all matter.

Is the off-peak rate only for the car?

The published overnight household band applies to home electricity under the tariff terms, while additional managed slots have specific billing rules that should be checked with Octopus.

Can solar decide the EV tariff for me?

No. Solar can reduce grid imports, but seasonal generation, charging time and export pairing still need separate consideration.

Continue your comparison

Limits of this guide

This guide compares public tariff structures. It is not a switching quote, eligibility decision, bill forecast or equipment-performance guarantee. Verify live rates, standing charges, product terms, device support and meter operation with Octopus before switching.

Primary sources