Can You Push-Start or Jump-Start an Electric Car?

You cannot push-start an electric car, and jump-starting one is more complicated than it is with a petrol vehicle. EVs have no clutch, no gearbox in the traditional sense, and no way to turn the electric motor by rolling the car forward. If the traction battery is flat, pushing the car simply will not restart it. What you can sometimes do is deal with a failed 12V auxiliary battery, which is a separate, smaller battery that most EVs carry alongside the main traction pack. For everything else, breakdown cover is your best friend. Browse our guides for more practical EV ownership advice.

Why can't you push-start an electric car?

Push-starting works in a petrol car because you can use the car's momentum to spin the engine via the clutch and gearbox. Electric cars have neither. The electric motor needs a live electrical supply to turn; it cannot be spun into life by rolling. Even if rolling the car generated a small amount of regenerative braking energy, it would not be nearly enough to boot the car's systems back up from a genuinely flat battery. If the traction battery has run out of charge, the only solution is to add charge from an external source.

What is the 12V auxiliary battery and why does it matter?

Most electric cars carry two separate batteries. The large traction battery powers the electric motor and gives you your driving range. The small 12V auxiliary battery, similar in size and purpose to the battery in a petrol car, powers the car's electronics: door locks, lights, dashboard, 12V sockets, and the systems needed to wake the car up and begin charging. If the 12V auxiliary battery fails or goes flat, the car may refuse to unlock, power on, or start a charging session, even if the traction battery still has plenty of charge. This catches many EV owners off guard.

Can a jump pack or jump leads fix a dead 12V?

Possibly, but you must follow your manufacturer's instructions precisely before attempting anything. On many EVs, there is a dedicated 12V jump point, sometimes hidden under a cover in the engine bay or boot area. Connecting a 12V jump pack to those terminals, following the correct polarity and procedure from the owner's manual, may restore enough power for the car's electronics to wake up. Once the car is awake, you can plug it in to charge the traction battery normally. Never connect jump leads to the high-voltage traction battery terminals; these operate at hundreds of volts and are not jump-startable in any conventional sense. The procedures vary significantly between manufacturers and models, so the owner's manual is not optional reading here.

Can you use an EV's 12V system to jump-start a petrol car?

Generally, this is not recommended, and many manufacturers explicitly advise against it. The 12V auxiliary battery in an EV is often smaller and less capable of delivering the sustained high current that a petrol starter motor demands. Attempting it could damage the EV's 12V system. Check your owner's manual; if it says do not use the car to jump-start another vehicle, follow that advice. If you are in a situation where someone else needs a jump, a portable jump pack is a better tool for the job than your EV's 12V battery.

What should you do if your EV's traction battery is completely flat?

Pull over safely if you are driving. Hazard lights on. Then call your breakdown provider. Most major UK breakdown services now carry mobile EV charging units that can deliver enough charge to get you to the nearest public charger. If mobile charging is not available, the car will need to be recovered on a flatbed. Do not attempt to flat-tow an EV (with two or four wheels on the ground) unless the owner's manual specifically permits it for your model; doing so can damage the electric motor or drivetrain. A flatbed is the safe default.

How do you prevent this situation in the first place?

The best approach is straightforward: plug in regularly. If you use your EV most days, getting into the habit of plugging in each time you park at home keeps the traction battery in a healthy state of charge. It also keeps the 12V auxiliary battery topped up, because on most EVs the main charger maintains the 12V system while the car is plugged in. Leaving an EV parked for weeks with a very low traction battery can allow the 12V to drain to a point where the car will not respond. If you are storing the car or leaving it for an extended period, check the manufacturer's guidance on the recommended state of charge and whether a maintenance charger is advisable.

Frequently asked questions

Can you push-start an electric car if the battery is flat?

No. Push-starting relies on a clutch and gearbox to turn a combustion engine. Electric motors do not work this way. Pushing a flat EV will not generate enough power to restart it. The only solution for a flat traction battery is charging from an external power source or recovery by a breakdown service.

What happens if my EV's 12V battery goes flat?

The car's electronics will stop working, which means you may not be able to unlock the doors, start a charging session, or power on the dashboard. A 12V jump pack applied to the correct terminals (check your owner's manual for their location) may restore power. Some EVs also have a mechanical key hidden in the key fob for emergency door entry.

Is it safe to jump-start the 12V battery on an EV?

It can be, if you follow the manufacturer's procedure exactly. Use a 12V jump pack, not a running petrol car, and always connect to the designated jump terminals rather than any random point under the bonnet. Never attempt to jump the high-voltage traction battery. If in doubt, call your breakdown provider rather than attempting it yourself.

Can I use my EV's battery to jump a petrol car?

Most manufacturers advise against this. The 12V auxiliary battery in many EVs is not designed to deliver the high current a petrol starter motor needs, and attempting it could damage your EV's 12V system. Check your owner's manual. A dedicated portable jump pack is a better option for helping others.

Will an EV need to go on a flatbed if it runs out of charge?

Often, yes. Many breakdown providers can deliver a mobile charge to get you moving, but if no mobile charger is available, flatbed recovery is the safe choice. Most EVs cannot be flat-towed as it can damage the drivetrain. Always check the owner's manual for your specific model before agreeing to any towing method.

How long does the 12V auxiliary battery last in an EV?

Typically a few years, similar to a conventional car battery, though this varies by model and usage. Regular charging and plugging in when parked helps keep it maintained. If you notice the car being slow to wake up or having intermittent electrical faults, ask your dealer to check the 12V battery health at the next service.

Understanding how your EV responds to a flat battery, whether the 12V auxiliary or the main traction pack, helps you stay calm and make the right call if it ever happens. Keep breakdown cover in place, know where your 12V jump terminals are, and plug in regularly to avoid the situation entirely. If you are new to EV ownership and want to understand more about charging options, our portable EV charger guide covers the basics of Mode 2 granny chargers, and you can find the right cable for your car at our cables-by-car page.