Your EV battery is probably the largest battery you own. A typical modern EV carries 60-80 kWh of usable storage — roughly 5-8 times the capacity of a typical home battery. The obvious question that follows: can your EV power your home?
The answer in 2026 is “yes, but only on specific cars with specific chargers, and the economics are still emerging.” Here’s the honest picture.
The three flavours of bidirectional charging
Three related but distinct technologies sit under the broader “EV as a battery” umbrella:
V1G (smart charging) — your EV charges when grid electricity is cheap (overnight, smart tariff windows) instead of whenever you plug in. Standard on every smart charger we install (Zappi, Ohme, Easee). Not technically bidirectional but commonly grouped with the others.
V2H (vehicle-to-home) — your EV discharges back into your home electrical system, replacing or supplementing other sources during peak hours or grid outages. Requires a V2H-capable charger and a V2H-capable EV.
V2G (vehicle-to-grid) — your EV discharges back into the grid (not just your home), earning export tariff income or providing grid-balancing services. Same hardware as V2H plus a smart-meter export agreement with your supplier.
What’s actually working in 2026
The honest current state:
| Capability | Status (May 2026) | Cost |
|---|---|---|
| V1G smart charging | Mature, ubiquitous on all smart chargers | Included in standard install |
| V2H on supported cars + dedicated charger | Available, limited car compatibility | £4,500-£7,000 for charger + install |
| V2G with export tariff | Available, very limited car compatibility | £4,500-£7,000 charger + bespoke tariff |
| V2X on any non-supported car | Not possible — needs car + charger both supporting | — |
The Holy Grail of “any EV powers any home” doesn’t exist yet. Both the car and the charger need to support bidirectional power flow, and they need to communicate using compatible protocols.
Cars that support V2H/V2G
As of May 2026, UK cars with confirmed V2H or V2G capability:
- Nissan Leaf (all CHAdeMO versions, including 24kWh, 30kWh, 40kWh, 62kWh)
- Nissan Ariya (CCS V2X-ready, awaiting bidirectional firmware)
- Cupra Born (CCS bidirectional firmware, OTA-enabled)
- VW ID.3, ID.4, ID.5, ID.7 (CCS bidirectional firmware, partial rollout)
- Hyundai Ioniq 5, Ioniq 6, Kona Electric (2024+) (CCS V2X via Hyundai-spec hardware)
- Kia EV6, EV9, Niro EV (2024+) (same Hyundai/Kia E-GMP V2X stack)
- Polestar 3, Polestar 4 (CCS V2X-ready)
- MG4 EV, MG5 EV (long-range) (some variants)
Notably not currently supported: Tesla (all models — Tesla has not enabled bidirectional charging on consumer Model 3/Y/S/X), most legacy Renault/Peugeot/Citroen EVs, most fleet vehicles below 2024 model year. Tesla’s stance may change but as of May 2026 they haven’t enabled it on the consumer fleet.
If your EV isn’t on the list, V2H/V2G isn’t an option in 2026 regardless of charger choice.
Chargers that support V2H/V2G
Two main residential V2H/V2G chargers available in the UK in 2026:
Indra V2H — CHAdeMO and CCS variants. UK-designed and supported. Works with Nissan Leaf, Cupra Born, MG. Around £4,500-£6,000 fitted.
Wallbox Quasar 2 — CCS-only. Works with most CCS V2X-capable cars (Hyundai/Kia E-GMP, VW MEB, etc.). Around £5,500-£7,000 fitted.
Both chargers are visually larger than standard Zappi/Ohme units — they contain a bidirectional inverter rather than just an AC-charging socket. Plan a wall location with more depth than a standard charger.
Does V2H actually save money?
The economics depend heavily on what you’re using V2H for:
Use case 1: tariff arbitrage — charge at 7p/kWh overnight, discharge at 28p/kWh during evening peak. A 60kWh EV cycling 20kWh per day captures roughly £4 of arbitrage spread daily, or £1,400/year. Versus the typical £400-800/year from a 10kWh home battery. Sounds great — but cycling your EV battery 365 times a year accelerates degradation.
Use case 2: home backup during grid outage — your 60kWh EV can power a typical 3-bed home for 3-5 days during an outage. Genuinely useful insurance, but realistically the UK sees zero or one extended outage per year for most homes.
Use case 3: solar self-consumption — V2H captures surplus solar that would otherwise export at SEG rates. Saves the spread between SEG (~15p) and retail import (28p) — about 13p/kWh on captured surplus. For typical hardware ROI to make sense, you need significant solar surplus (4kW+ system) and the V2H hardware paying back over 8-12 years.
Use case 4: V2G grid-services revenue — earn payment for providing grid-balancing services. Octopus runs the Octopus Energy V2G trial; participants earn around £400-£600/year. Promising but still nascent.
The battery degradation question
The most-asked V2H question: does cycling the EV battery wear it out faster?
Honest answer: yes, slightly. Modern LFP-chemistry batteries (BYD Blade, CATL LFP) tolerate cycling well — typically 5,000-10,000 cycles before significant degradation. NMC-chemistry batteries (Tesla, most German manufacturers) are more cycle-sensitive — typically 2,500-5,000 cycles.
For a typical 60kWh EV cycling 20kWh/day for V2H tariff arbitrage, you’re looking at an additional 365 partial cycles per year vs the ~150 cycles needed for typical driving. So roughly tripling annual cycle count. Over 8-10 years, that’s a meaningful degradation acceleration.
For V2H used only for occasional backup (grid outages) or solar surplus capture (a few hours per day on sunny days), the degradation impact is much smaller — comparable to or below typical driving.
The honest case: tariff-arbitrage V2H is currently more expensive in degraded battery resale value than it saves in tariff spread. Solar-capture V2H is closer to break-even. Backup-only V2H is a worthwhile insurance product if you specifically value it.
What we recommend in 2026
Based on what we see across customer enquiries:
If you don’t yet have an EV: Install a standard smart charger (Zappi, Ohme or Easee) now. Don’t overspec hardware for V2H. When you upgrade to an EV in 2-4 years, V2H technology will have matured and you can install dedicated bidirectional hardware then if it fits your case.
If you have a V2H-capable EV already (Nissan Leaf, Cupra Born, Hyundai/Kia E-GMP, etc): Consider V2H if you specifically value backup capability or have significant solar surplus. Skip it for pure tariff arbitrage — a £4,500 V2H install vs a £4,500 10kWh home battery, the battery wins on every metric.
If you have a Tesla: V2H isn’t available regardless of what hardware you install. Tesla Powerwall is the right battery for Tesla EV owners — it’s the only battery eligible for the Tesla Energy Plan SEG (24p/kWh), and it integrates cleanly with the Tesla app ecosystem.
If you’re building a new home or doing major renovation: Worth installing the cabling and wall preparation for a future V2H charger even if you don’t fit one now. Doubles your future flexibility for almost no current cost.
When V2G might genuinely make sense
Octopus’s V2G trial pays around £400-600/year to participants who allow Octopus to discharge their EV during peak grid demand hours. For drivers who:
- Have a V2X-capable EV
- Drive low annual mileage (under 6,000 miles)
- Are on Octopus Intelligent or Octopus Go anyway
- Don’t mind ceding some control over the car’s charging windows
…V2G is genuinely lucrative. The £400-600/year covers a meaningful chunk of the V2G hardware cost over a few years.
For higher-mileage drivers who need the EV ready to go at unpredictable times, V2G is less attractive — the contract obligations restrict your usage.
The 2026-2028 trajectory
V2H/V2G technology is maturing fast. Tesla’s hand will likely be forced by competitive pressure within 12-18 months. UK-specification CCS V2X is becoming standard on new EVs from 2024 onwards. Bidirectional charger prices are dropping ~10-15% per year as volume scales.
By 2028 we’d expect V2H to be a standard option on most home EV charger installs at a modest premium (£500-£1,000 over standard 7kW) rather than a separate £4,500+ category. Until then, it’s a specialist install for specific use cases.
If you’re trying to decide between V2H now or “wait and see,” our honest current advice is: wait, unless you have specific backup-capability or solar-surplus requirements that make sense at current prices.
Book a free EV charger consultation → and we’ll talk through which option fits your specific car, driving pattern and tariff. We install Zappi, Ohme, Easee, Indra V2H and Wallbox Quasar — and we’ll honestly tell you which makes sense.
Related: Best home battery UK 2026 · Smart Export Guarantee explained 2026 · EV chargers service page