Vehicle-to-grid (V2G) buy-back in the UK does not work like a solar export tariff. There is no published rate in pence per kilowatt-hour that lands in your bank account. Instead, the UK’s only commercial V2G tariff — Octopus Power Pack — translates the grid value of your car’s exported energy into free EV charging each month. The saving can reach £620 a year compared with a standard flexible tariff, but the mechanism is indirect and the eligibility requirements are specific.
As of 2026, Octopus Energy is the only UK supplier running a live commercial V2G tariff. The market is early-stage. Understanding how the current buy-back model works — and where it is likely to go — helps you judge whether it is worth acting on now or waiting.
Key Takeaways
- V2G buy-back in the UK is currently delivered as free EV charging, not a cash rate per kilowatt-hour exported
- Octopus Power Pack is the only commercial V2G tariff available in the UK as of 2026
- Savings can reach £620 a year versus a standard flexible tariff at typical driving distances
- You need a compatible vehicle, bidirectional charger, smart meter, and a G99 certificate from your DNO
- More explicit buy-back rates are likely as vehicle and charger compatibility expands
How V2G electricity buy-back actually works
The simplest way to understand UK V2G is to separate the energy flow from the payment flow. The energy flow is straightforward: your EV sends electricity back to the grid during periods of peak demand or when renewable generation is scarce. The payment flow is where the UK model currently differs from what many people expect.
Here is the process on Octopus Power Pack:
- You plug your V2G-compatible EV into a bidirectional charger before going to bed
- Octopus’s Kraken platform monitors grid conditions throughout the night and into the morning
- When grid demand peaks or energy prices rise, Octopus draws power from your car’s battery and exports it to the local distribution network
- In exchange for providing this grid flexibility service, Octopus provides your EV charging free of charge for the month
There is no itemised statement showing how many kilowatt-hours you exported or at what rate. The value is absorbed by Octopus — who sell the flexibility to the grid — and passed back to you as a tariff benefit. It is a bundled deal rather than a metered payment.
Solar and battery storage are handled separately. If you have a solar array or home battery system that also exports, those exports earn your standard export rate, which operates independently of the V2G arrangement.
The only live V2G tariff in the UK: Octopus Power Pack
Octopus launched Power Pack as the UK’s first mass-market V2G tariff. No other supplier currently offers a commercial equivalent.
The financial case, using Octopus’s own modelling at 7,500 annual miles (0.306 kWh per mile):
| Comparison scenario | Annual saving |
|---|---|
| Versus a standard flexible tariff | Up to £620 |
| Versus Intelligent Octopus Go (pre-April 2026 rate) | £161 |
The comparison against Intelligent Octopus Go requires context. Octopus cut the off-peak rate on that tariff to 5.49p per kilowatt-hour from April 2026, with some postcodes receiving 3.49p. This rate reduction narrows the gap between Power Pack’s “free charging” and what a well-managed smart tariff already delivers. Figures vary — verify the current comparison directly at octopus.energy/power-pack/ before making a decision based on these numbers.
There is no standing charge on Power Pack, which provides a modest additional saving for lower-consumption households.
Power Pack cannot be combined with Octopus Agile, Tracker, or Intelligent Octopus import and export tariffs. Taking Power Pack means giving up those products.
For a detailed breakdown of the tariff structure, see our Octopus Power Pack tariff guide.
What you need to receive V2G payments
Five requirements must all be met simultaneously. Missing any one of them disqualifies you.
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A V2G-capable EV. Octopus Power Pack currently accepts two vehicle setups: the BYD Dolphin paired with a Zaptec Pro charger, or the Nissan Leaf, Nissan e-NV200, or Mitsubishi Outlander PHEV paired with a Wallbox Quasar v1. See our guide to V2H-compatible cars for the latest additions.
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A compatible bidirectional charger. The charger and vehicle combination must be on Octopus’s approved list — you cannot mix and match these setups freely.
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A smart electricity meter. Octopus requires one to manage your account, track your usage, and schedule charging sessions.
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A G99 certificate from your DNO. This is the legal permission from your Distribution Network Operator to export energy to the grid. Applying for G99 typically takes 30 to 60 working days, so factor this into your timeline before ordering hardware.
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Consistent plug-in behaviour. You must plug in for at least 12 hours a day on a minimum of 20 days per calendar month. Monthly energy use must stay below 210 kWh (approximately 625 miles of range).
Why doesn’t V2G pay more?
A fair question, given the technology involved. The answer lies in what the grid actually values.
Grid operators pay for flexibility, not for energy volume. A kilowatt-hour exported at precisely the right moment — during an evening demand spike, say — is worth more than the same unit exported at midnight when demand is low. Octopus captures this timing value through its Kraken platform and translates it into the tariff saving.
The UK does not yet have a Smart Export Guarantee equivalent for EV batteries. The SEG — the scheme through which solar and small-scale generation owners receive a metered export rate — does not cover vehicle batteries. V2G income therefore flows only through supplier-specific tariff arrangements like Power Pack, not through a regulated metered payment framework.
As the market matures, more explicit per-kilowatt-hour buy-back rates may emerge. For now, the free-charging model is how the value reaches consumers.
When will V2G payments improve?
Several things need to happen before buy-back rates become more competitive or more widely available:
- More vehicles gaining bidirectional certification — the Hyundai IONIQ 5 and Kia EV9 are expected to expand V2G-compatible options over 2026 and 2027
- More Distribution Network Operators following UK Power Networks in enabling automatic V2G approvals, reducing the bureaucratic friction of the G99 process
- Ofgem reviewing export payment frameworks to consider whether EV battery export should attract a regulated rate, as solar does under the SEG
- More charger manufacturers gaining ENA type-testing approval, which is required before many DNOs will grant automatic connection
The trajectory is positive, but the timeline for significant rate improvements is unclear. If you own a compatible vehicle now and meet the eligibility criteria, the current saving is real and bankable. If you are waiting for a better deal before buying a compatible car, the hardware landscape is likely to look quite different within 18 months.
Want to know whether your car is already on the list? Check our guide to V2H-compatible cars before investing in any bidirectional charger.
Frequently Asked Questions
How does V2G buy-back work in the UK?
V2G buy-back means your EV’s battery exports electricity to the grid during peak demand periods, managed automatically by your energy supplier. In the UK, Octopus Energy’s Power Pack tariff translates this value into free EV charging rather than a separate pence-per-kilowatt-hour payment. The grid flexibility service is provided automatically while your car is plugged in overnight.
How much can I earn selling electricity back to the grid from my EV?
Octopus Power Pack’s figures show savings of up to £620 a year versus a standard flexible tariff for drivers covering around 7,500 miles per year. This is delivered as free charging rather than a direct cash payment. The actual saving depends on your alternative tariff comparison and how reliably you can plug in on 20 nights per month. Figures vary — verify current data at octopus.energy/power-pack/.
Is there a Smart Export Guarantee for EVs in the UK?
No. The Smart Export Guarantee covers solar panels and other small-scale generation but does not currently extend to EV battery export. V2G income in the UK is available only through Octopus Power Pack’s tariff model, which provides free charging rather than a metered export payment at a published pence-per-kilowatt-hour rate.