Engineers weigh in on viral image that suggests a Chevy Bolt can recharge while driving using a generator

Engineers have weighed in on a viral image that suggested a Chevy Bolt can perpetually recharge while driving using a generator, and the verdict is brutal.

A Chevrolet Bolt was spotted by a Reddit poster with a belt-driven generator bolted to its rear wheel has gone viral for all the wrong reasons.

The internet loves the idea of an EV that can recharge itself while rolling down the road and can be freely and perpetually charged.

Real engineers say it cannot create free energy, and it would probably drain the battery faster than it charges it.

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Engineers weigh in on a viral DIY Chevy Bolt generator

A picture of a Chevy Bolt EV went viral on Reddit; it had a belt and a generator contraption attached to the back wheel.

The viral setup looks simple: attach a generator to your EV’s wheel, let the wheel spin it, and route the electricity back into the car – it sounds like free energy forever, right?

A generator does not make power out of nothing, however, it makes electricity by taking mechanical energy from the wheel.

That creates drag, like permanently driving with a handbrake lightly applied.

The Bolt’s motor then has to work harder to keep the same speed, pulling more energy from the battery.

The generator converts some of that energy back into electricity, but never perfectly.

Every step wastes energy as heat, friction, and resistance.

That’s why engineers compare it to a perpetual motion machine, as the maths never comes out in your favor -you always lose more than you gain, so range drops instead of improving.

It’s not very realistic

EVs already have a built-in version of this concept, and it’s far smarter: regenerative braking.

When you slow down, the motor becomes a generator and recovers some energy that would have been lost to braking.

The key detail is that regenerative braking works when you are already reducing speed, so it is recapturing energy that would otherwise vanish.

A wheel-mounted generator tries to harvest energy constantly, which forces the car to spend extra energy just to overcome its own added resistance.

The only time it might produce useful power is downhill, but the Bolt’s regenerative charging already covers that more efficiently.

There is also a more realistic explanation for why someone might do this.

Engineers suggest the setup could have been meant to top up the 12-volt battery while the car was being towed behind an RV, not to recharge the main high-voltage pack while driving.

Either way, this DIY solution might not be the best idea, but every failed experiment is one step towards more efficient charging.