Vehicle-to-Grid (V2G) is a technology that lets your EV send power back to the grid. Here's what you need to know.
What Is Vehicle-to-Grid?
The Basic Concept
Instead of just charging your car, V2G allows:
Your EV battery becomes a two-way energy storage device.
How It Works
| Stage | What Happens |
|---|---|
| Off-peak | Car charges when electricity is cheap |
| Peak demand | Car discharges to grid when electricity is expensive |
| Payment | You get paid for supplying power |
You're essentially selling electricity back when it's worth more.
Related Technologies
V2G vs V2H vs V2L
| Term | Meaning | Use Case |
|---|---|---|
| V2G (Vehicle-to-Grid) | Power to electricity grid | Earn money, support grid |
| V2H (Vehicle-to-Home) | Power to your house | Backup power, use your own solar |
| V2L (Vehicle-to-Load) | Power to devices/appliances | Camping, power tools, emergencies |
V2L is most common currently — many EVs have this already.
Current State of V2G in UK
Availability
| Aspect | Status (2026) |
|---|---|
| Technology | Exists and works |
| Compatible cars | Limited selection |
| Compatible chargers | Few available |
| Energy suppliers | Trial schemes |
| Mass adoption | Not yet |
V2G is emerging but not mainstream yet.
Cars That Support V2G
| Make | Models |
|---|---|
| Nissan | Leaf (CHAdeMO) |
| Mitsubishi | Outlander PHEV |
| Some Chinese brands | Various |
Most EVs do NOT support V2G — it requires specific hardware and software.
Why Most EVs Don't Support It Yet
| Barrier | Explanation |
|---|---|
| Hardware | Needs bidirectional inverter |
| Connector standard | CHAdeMO supports it; CCS adoption slower |
| Cost | Adds to vehicle price |
| Warranty | Concerns about battery cycles |
How V2G Could Benefit You
Potential Financial Benefits
| Scenario | Benefit |
|---|---|
| Buy cheap electricity (night) | 7-10p/kWh |
| Sell expensive electricity (peak) | 25-35p/kWh |
| Profit per kWh | ~15-25p |
| Daily cycle (20kWh) | £3-5/day |
| Annual potential | £1,000-1,800 |
These are optimistic figures — real-world earnings depend on many factors.
Grid Benefits
| Benefit | How |
|---|---|
| Peak shaving | Reduces demand spikes |
| Renewable integration | Store excess solar/wind |
| Grid stability | Balances supply and demand |
| Reduced infrastructure | Less need for new power stations |
The Concerns
Battery Degradation
| Concern | Reality |
|---|---|
| More cycles = more wear | Yes, additional cycling |
| Controlled cycling | Software can limit depth of discharge |
| Modern batteries | Handle cycling better |
| Warranty implications | May affect coverage |
Practical Issues
| Issue | Impact |
|---|---|
| Need V2G-compatible car | Limited options |
| Need V2G charger | Expensive, limited availability |
| Supplier participation | Not all support it |
| When you need to drive | May not have full charge |
Should You Care About V2G Right Now?
Yes, If...
| Situation | Why |
|---|---|
| You're interested in energy technology | Emerging opportunity |
| You already have solar/battery setup | V2H could complement |
| You want to future-proof | Buy compatible car |
| Your car already supports it | Worth exploring |
Not Really, If...
| Situation | Why |
|---|---|
| You need a car now | Limited compatible options |
| You don't want complexity | Just charge and drive |
| You're concerned about battery | Understandable caution |
| Your supplier doesn't offer V2G | No benefit available |
The More Immediate: V2L (Vehicle-to-Load)
Already Available
Many EVs have V2L outlets:
What V2L Does
| Use | Example |
|---|---|
| Power camping equipment | Lights, fridge, heater |
| Run power tools | Drills, saws on job site |
| Emergency backup | Power essentials during outage |
| Charge other EVs | Help stranded EV (slowly) |
V2L is practical today and doesn't require grid integration.
The Future of V2G
What's Coming
| Development | Timeline |
|---|---|
| More compatible cars | 2025-2027 |
| CCS bidirectional standard | Being finalised |
| More charger options | Growing market |
| Energy supplier schemes | Expanding trials |
When V2G Makes Sense
V2G will be more attractive when:
Estimate: Mainstream adoption 2027-2030.
What About V2H (Vehicle-to-Home)?
More Immediately Practical
| Benefit | Use |
|---|---|
| Power outage backup | Run essential appliances |
| Use solar generation | Store excess for evening |
| Reduce peak usage | Lower bills |
Availability
Some cars/chargers support V2H now:
Summary
| Question | Answer |
|---|---|
| What is V2G? | Your EV sends power back to the grid |
| Is it available now? | In limited trials, yes |
| Can my car do it? | Probably not (few cars support it) |
| Will I make money? | Potentially £1,000+/year (future) |
| Should I wait for V2G? | Don't — buy the car you need now |
| What about V2L? | Available now, very practical |
The Bottom Line
V2G is an exciting technology that will become more relevant over the next few years. However:
For most buyers today: Focus on choosing the right EV for your needs. V2G is a future benefit, not a current deciding factor.
If you're very interested in energy technology and flexibility, the Hyundai Ioniq 5/Kia EV6 platform offers V2L now, with V2H/V2G potential through compatible chargers.
The technology is real and beneficial, but for most people in 2026, it's something to watch rather than act on. Buy an EV that suits your driving needs, and V2G capability may be a bonus when it matures.