V2L lasts exactly as long as the energy you set aside, divided by what you plug in. Small loads — lights, laptops, a fridge — run for days of use on a single charge, while heating-class loads can spend the same energy in a few hours. There is no fixed V2L runtime; there is one division sum, and your car’s discharge limit decides where it stops.
Key Takeaways
- V2L runtime is a division: the energy you set aside, divided by the load you plug in.
- Small loads run for days of use; heating-class loads spend the same budget in hours.
- The discharge limit you set ends most sessions — by design, before the battery gets low.
- Budget V2L only after the drive home is covered, and plan the refill.
The Sum: Energy Set Aside ÷ Load
Hours = energy you allow (kWh) ÷ load (kW). The budget is not the whole battery. It is the slice between your starting charge and the discharge limit you set in the car’s menu — the floor that protects the charge you still need for driving. Say you park at 80% and set the floor at 30%: on an example 60 kWh usable battery, that is about 30 kWh of working budget. The table spends a smaller example budget of 10 kWh, using the typical-draw bands from our guide to bidirectional charging. Every figure is an example — your appliance labels and your battery decide your real numbers.
| Example load | Typical draw | Hours from an example 10 kWh budget |
|---|---|---|
| Lights, laptop, phone charging | About 50 W | About 200 hours — evenings for weeks |
| Small fridge | Roughly 100–300 W | About 33–100 hours, spread across its on-off cycles |
| TV and games console | Roughly 200 W | About 50 hours |
| Power tools, used in bursts | Several hundred watts and up | Days of intermittent work — the motor rests more than it runs |
| Kettle or space heater | Often 1,000 W or more | Under 10 hours — and such loads are often over the car’s output rating anyway |
What Actually Ends a V2L Session
- Your discharge limit. When the battery reaches the floor you set, V2L stops. This is the normal ending, and the one you control — set the floor before you plug anything in, as our guide to which EVs can do bidirectional charging notes when checking a car’s features.
- The car’s own reserve. Below your setting sits a reserve the car will not spend at all, so V2L cannot strand you with an empty battery.
- An overloaded outlet. A load above the rated output trips the system off. That is protection, not a fault — split the load or drop the appliance.
- You, driving away. Every hour of V2L is energy the wheels will not see. The honest budget is what is left after the drive home is covered.
Stretching the Hours
- Spend on the small loads. Lighting, screens and device charging cost almost nothing; heating and boiling are what empty batteries. Heat water on a stove, not from the car.
- Let cycling loads cycle. A fridge draws its rated watts only while the compressor runs. Judge it by the day, not the label’s peak.
- Start fuller, set the floor honestly. A bigger starting charge stretches runtime only if the floor still protects tomorrow’s driving.
- Plan the refill. A long V2L weekend ends with a long recharge. Know where the car refills before the battery becomes the schedule.
Refilling the Car Afterwards
V2L spends the charge; something has to put it back. At a campsite or work site with a suitable outlet, a portable charger in the boot does it: the EVDANCE EV-ACS4005T 40A NACS portable charger delivers 9.6 kW from a NEMA 14-50 outlet with adjustable current, and the EVDANCE EV-AC04001U 40A J1772 portable charger covers J1772 cars. Both are IP66 rated for outdoor use.
Frequently Asked Questions
Can V2L run a fridge overnight?
Easily, on the example numbers above. A small fridge averaging within its 100–300 W band across the night spends roughly 1–3 kWh — a small slice of any EV battery, and the discharge limit still guards the rest.
Does V2L switch off by itself?
Yes. It stops at the discharge limit you set, or sooner if a load trips the outlet’s protection. What it will not do is run the battery flat: the car’s reserve sits below every setting you can choose.
How long can V2L power a house?
It cannot power a house at all — V2L runs individual appliances plugged into the car. Feeding house circuits is vehicle-to-home, which needs a bidirectional charger and transfer equipment; see when vehicle-to-home will be available.
Related Reading
- Bidirectional Charging Explained: V2L, V2H and V2G
- Which EVs Can Do Bidirectional Charging?
- When Will Vehicle-to-Home Be Available?
- Is Bidirectional Charging Worth It?
