can an ev jump start another car

[Rafael]

Yes, you can use an electric vehicle (EV) to jump-start another car with a dead 12-volt battery, but it must be done with extreme caution and by following the correct procedure. The power comes from the EV's 12-volt auxiliary battery, not the high-voltage traction battery that powers the wheels. This small battery is similar to the one in a gasoline car and is used for powering accessories like the lights, infotainment screen, and computers. Attempting to jump-start another car incorrectly can cause serious damage to the EV's sensitive electrical systems.

The process is fundamentally similar to a traditional jump-start but requires locating the specific 12V battery terminals, which are often in the frunk (front trunk) or under a service panel. The key is to ensure the EV is fully turned off—not just in "accessory" or "ready" mode—before connecting the jumper cables. This prevents any power surges from affecting the main battery pack or control units. After a successful jump-start, it's wise to drive the EV for a while to allow its DC-to-DC converter to recharge the 12V battery.

Consideration	Gasoline Car	Electric Vehicle (EV)
Power Source	Alternator (engine running)	12V Auxiliary Battery (vehicle OFF)
Risk of Damage	Moderate (primarily to donor car's alternator)	High (to sensitive control modules)
Common 12V Battery Location	Under the hood	Frunk or under a service panel
Recommended Procedure	Connect cables with donor car running	Connect cables with donor EV completely OFF
Key Precaution	Avoid reverse polarity	Avoid any mode where EV's high-voltage system is active

Always consult your EV's owner's manual for the exact procedure and approved jump-starting points. If you are unsure, it is safer to call for roadside assistance.

[DelSebastian]

I’d be really careful about this. My neighbor tried it with his fancy new EV and ended up with a huge repair bill. The problem is that the electronics in these cars are super sensitive. You're not supposed to hook up cables to the big battery; you have to find this little 12-volt one, and if you get it wrong, you can fry the computer. Honestly, unless you're 100% sure you know what you're doing, just call a tow truck. It's not worth the risk.

[ZaneAnn]

Technically, it's possible because EVs have a standard 12-volt battery for the lights and computers. However, the procedure is different. You must locate the dedicated jump-start terminals, which are not always obvious. Crucially, the EV must be completely powered down before you connect the cables. The high-voltage system should remain inactive throughout the process to prevent any voltage spikes from damaging the vehicle's intricate electronics. Always prioritize the instructions in your specific model's manual over general advice.

[OHarmony]

I see this question a lot. The short answer is yes, but it's a "read the manual first" situation. You're not pulling power from the massive drive battery. Instead, you're using the smaller battery that runs the radio and windows, just like in a regular car. The biggest mistake people make is having the EV on when they connect the cables. It needs to be off. If you follow the exact steps for your car—usually involving specific posts under the frunk—it can work fine. But if you're hesitant, a portable jump starter is a safer bet for everyone.

[MaximusLee]

From a practical standpoint, using an EV as a rescue vehicle isn't ideal. While it can be done, the focus should be on safety and preserving the EV's complex systems. The energy is drawn from a relatively small 12-volt battery, which has limited capacity compared to an idling gasoline engine's alternator. You might get the other car started, but you risk draining the EV's 12V battery, which could then prevent your own car from starting. For occasional needs, investing in a compact, modern lithium-ion jump pack is a more reliable and less risky solution that doesn't involve another vehicle.