Intelligent Octopus Go vs OVO Charge Anytime 2026

The headline rate gap is the easiest place to start. Intelligent Octopus Go dropped to 5.49p/kWh on 1 April 2026 (a 39% cut from the previous 9p rate, driven by the November 2025 Budget removing approximately £150 of green levies from electricity bills). OVO Charge Anytime's pay-as-you-go option moved the other way on 4 November 2025: the previous 7p/kWh flat rate doubled to 14p/kWh, alongside the launch of four monthly add-on plans.

That puts the two PAYG rates ~2.5× apart — but the comparison is more nuanced than the headline gap suggests. Three structural differences matter as much as the unit rate:

Whole-home vs EV-only. Intelligent Octopus Go's 5.49p rate applies to everything drawn between 23:30 and 05:30 — heating, hot water, dishwasher, phone chargers, anything on the meter. Charge Anytime's 14p rate applies only to the EV charging session itself; the rest of your household electricity stays on OVO's standard unit rate at all hours. A typical UK home with a heat pump and an electric hot-water cylinder can easily shift another 100–200kWh/month into the cheap window, which Intelligent Octopus Go monetises and Charge Anytime doesn't.

Fixed window vs smart-scheduled any-time. Intelligent Octopus Go runs on a 23:30–05:30 nightly window. Charge Anytime has no fixed window — you tell OVO when the car needs to be ready by, and OVO's scheduler picks the greenest available half-hours within that deadline. For households where overnight charging works, the fixed window is fine. For drivers on rotating shifts, parents who plug in at school-run time, or households with two EVs sharing one charger, Charge Anytime's flexibility is a real, distinct value — even at 14p/kWh.

The 6-hour cap. From March 2026, Intelligent Octopus Go limits the off-peak rate to the first six hours of charging per 24-hour period (measured midday-to-midday). Charging beyond that falls to the customer's daytime Boost rate, which sits around 32p/kWh. Octopus's own data shows roughly 80% of nightly sessions already fit inside six hours, but very high-mileage drivers or households charging multiple EVs on one connector can hit the cap regularly.

OVO's four [monthly plans](/blog/ovo-charge-anytime-monthly-plans/) (Standard at £27.50, Premium at £37.50, Standard Plus at £59.50, Premium Plus at £79.50) bundle a kWh allowance, a public-charging voucher, and EV charger cover. On a pure home-charging cost-per-kWh basis they look poor: £27.50 for 175 kWh works out at 15.7p/kWh, and the higher tiers run 15–17p/kWh. That's worse than the 14p PAYG rate before any other factor.

The monthly plans only start to make sense when two specific conditions hold:

You actually use most of the bundled allowance. A driver who consistently uses 175 kWh at home each month gets full value from Standard's 700-mile allowance. A driver who only uses 100 kWh a month is paying for 75 kWh they didn't need, which raises the effective per-kWh cost to ~27p. The plans are strict caps too: home-charging consumption above the allowance reverts to your standard home unit rate (typically 25–35p/kWh for OVO's variable tariffs), not back to the 14p PAYG rate.

You use the public-charging voucher. The £120/year voucher (£240 on the Plus tiers) buys ~200–500 kWh of public DC charging at typical 50–70p/kWh rates. That's meaningful — at £240/year, the voucher alone is worth £20/month, which essentially halves the headline plan cost for drivers doing 1,000+ public miles a year. Drivers who never use the public network are leaving most of that value on the table.

Even after both factors apply, Intelligent Octopus Go is normally still cheaper for the household electricity portion. The Charge Anytime monthly plans are best understood not as competing on price but as a packaged convenience product — predictable monthly cost, public-charging built in, EV charger insurance bundled — for drivers who would otherwise be on Charge Anytime PAYG.

Use the three inputs that matter most: monthly home charging in kWh, whether you have a charger from Octopus's compatibility list, and how much mileage you do on the public network.

Two practical notes on this matrix. First, Intelligent Octopus Go requires switching to Octopus Energy as your supplier — that's a 4–6 week process and worth weighing against the saving over a 12-month horizon. Second, the headline rate-card numbers move with each Ofgem cap window (1 April, 1 July, 1 October, 1 January). The 5.49p figure here is correct for the April–June 2026 cap; check the live Octopus tariff card before signing up.

Both tariffs require an SMETS2 smart meter (or a compatible SMETS1 unit) sending half-hourly meter reads. If you don't already have one, the install adds 6–12 weeks to either switch and is free.

Intelligent Octopus Go additionally requires being a current Octopus Energy customer and owning a vehicle or smart charger on Octopus's compatibility list. As of May 2026 that list includes Tesla (direct API integration), Ohme Pro and ePod, Andersen EV, Octopus Charge, plus OCPP-compatible support for Wallbox, Hypervolt and Zappi. Customers without a supported charger fall back to standard Octopus Go, which has a shorter five-hour off-peak window and a slightly higher rate.

OVO Charge Anytime requires an active OVO Energy account and a compatible EV or smart home charger — OVO's compatibility list is broader than Octopus's because Charge Anytime uses OCPP rather than per-charger API integrations. Existing OVO customers can add Charge Anytime as an add-on without switching their underlying tariff. Non-OVO customers need to switch supplier to OVO first.

Neither tariff has an exit fee on its variable-rate version. Octopus's variable Intelligent Octopus Go and OVO's PAYG and monthly Charge Anytime plans can all be left or changed at any time. Some Octopus fixed-term variants (12-month locked rate products) carry exit fees — check the specific product page in your account before signing up to a fix.

Three things on the EV-tariff radar for the next six months matter more than the IOG vs Charge Anytime question itself.

First, the July 2026 Ofgem cap sets the next rate-card movement. The April cut was driven by the November 2025 Budget removing £150 of green levies; the July cap is unlikely to move levies again, but wholesale prices are the larger swing factor. Both Octopus and OVO publish updated tariff cards 4–6 weeks ahead of cap day.

Second, EDF's GoElectric tariff at 6.99p/kWh on a 7-hour window launched alongside the April 2026 reshuffle. It undercuts Intelligent Octopus Go on rate slightly and offers the longest off-peak window of any UK EV tariff — a meaningful advantage for drivers regularly charging more than 50 kWh in a single overnight session. EDF doesn't have whole-home off-peak in the same form, so the IOG vs EDF comparison turns on how much non-EV consumption you can shift into the cheap window. Our best EV tariffs UK 2026 ranking covers the full eight-tariff field.

Third, the vehicle-to-grid (V2G) export market is starting to reach UK households on tariffs that pair with solar export. Octopus has a head start with Outgoing Octopus and the V2G pilot programme; OVO's V2G product remains in trial. Solar households planning to add V2G in 2026–2027 have a structural reason to prefer Octopus today.