Can you even convert your old car into an electric car with a ready-made kit?

Written by Fabio Lucas Carvalho

Published on 16/05/2026 at 21:38

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Retrofit kits promise to transform combustion cars into electric cars, but DIY conversion requires technical knowledge, is expensive, and may prevent the vehicle from legally circulating

Retrofit kits promise to transform a combustion car into an electric car without going through specialized workshops, but the proposal encounters issues with regulations, safety, cost, and legal use. In France, conversion is authorized, provided it is done by an approved professional and homologated for circulation.

The practice, known as retrofit, has gained attention for offering a second life to old vehicles and reducing environmental impact. It appears as an alternative to fuel consumption, a factor that makes the idea appealing given concerns about expenses.

The problem arises when the conversion leaves the professional environment and is presented as a DIY solution. Ready-to-use kits, with motor, battery and electronic modules, appear as a quicker path to electrify a thermal vehicle, but they require technical capability.

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Homemade electric car requires much more than a kit

On paper, the proposal seems simple. The owner buys a set with the main components, dismantles parts of the vehicle, and replaces the thermal system with an electric set. However, the comparison with a flat-pack furniture kit is far from reality.

The transformation involves systems related to safety, reliability, and the complete functioning of the automobile. It is not just about swapping parts but altering the vehicle’s architecture. Therefore, the lack of professional execution and formal approval creates a critical point.

In France, legal circulation depends on conversion carried out by an approved professional and subsequent homologation. Without this process, the transformed car may exist physically but cannot circulate on open roads under the required rules.

Chinese kit for Beetle shows the proposal’s limits

An example cited is a retrofit kit sold on AliExpress and specifically developed for a Beetle. The package includes a motor, battery, and electronic modules to transform the classic combustion car into electric, with an advertised price of 8,813 euros.

The offer draws attention because it gathers the necessary items for conversion but also highlights the obstacles. Besides requiring the buyer to own a Beetle, the kit is not authorized in France, which prevents its legal use on open roads.

With this, the result would be a converted vehicle, but without the regular possibility of circulation. The case shows the difference between having a product available for purchase and having a practical, safe, approved, and usable solution in common traffic.

Professional retrofit remains the most viable path

The idea of retrofit is not discarded when done within clear rules. Companies are working on faster and industrialized solutions, seeking to simplify the conversion without compromising the safety and compliance required to legally operate.

This professional model distances itself from DIY kits because it involves technical control, regulatory compliance, and responsibility for the outcome. On the road, transforming a car cannot be treated as simple DIY.

In the end, transforming a vehicle into an electric car on your own may seem appealing, but the material shows that the reality is more complex. Between cost, rules, and safety, the kit appears more as a curiosity than a concrete solution.

Can you even convert your old car into an electric car with a ready-made kit?

Retrofit kits promise to transform combustion cars into electric cars, but DIY conversion requires technical knowledge, is expensive, and may prevent the vehicle from legally circulating

Homemade electric car requires much more than a kit

Chinese kit for Beetle shows the proposal’s limits

Professional retrofit remains the most viable path

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Homemade electric car requires much more than a kit

Chinese kit for Beetle shows the proposal’s limits

Professional retrofit remains the most viable path

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Germany installed vertical solar panels on a lake in Bavaria, and the result broke conventional logic: instead of producing energy at midday peak, the plant generates more early in the morning and in the evening, exactly when families turn on appliances and factories are in full swing.

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