What an electric convertible actually is

An electric convertible is a car with a retractable or removable roof that runs on a battery and electric motor instead of a petrol engine. The convertible part works the same way it always has—a hydraulic mechanism opens and closes the roof, usually in 10 to 20 seconds. The electric part changes everything else: no engine noise, no gear changes, when ready torque from a standstill, and the ability to charge at home.

Right now, your options are limited. Tesla does not make a convertible. The main models available are the BMW i8 Roadster (a plug-in hybrid, not fully electric), the Porsche 911 Cabriolet with an electric variant in development, and the MG4 EV in some markets with a soft-top option. A few other manufacturers have announced convertible EVs, but production models are still years away. If you want a fully electric convertible today, your choices are genuinely narrow.

The appeal is real: silent driving with the roof down, no exhaust fumes, lower running costs than a petrol convertible. The trade-off is that a convertible body is heavier and less aerodynamic than a closed car, which cuts into the range an EV can achieve on a single charge. A convertible also costs more to build, so prices are higher than comparable closed-body EVs.

Key Takeaways

  • Electric convertibles are rare; only a handful of production models exist today, and most are expensive or not yet available in all markets.
  • The retractable roof mechanism adds weight and reduces aerodynamic efficiency, which shortens driving range compared to a closed EV of the same battery size.
  • Charging infrastructure, battery degradation over time, and repair costs for the roof mechanism are the main ownership considerations specific to electric convertibles.
  • A convertible EV costs more upfront than a closed EV with the same battery and motor, so the decision should rest on whether you will actually use the open roof.

How the roof mechanism affects range and efficiency

The retractable roof on a convertible adds roughly 100 to 150 kilograms of weight compared to a fixed roof. That weight sits high on the car, which raises the centre of gravity and makes the suspension work harder. The open-roof design also creates more wind resistance when the roof is down, and even when it is closed, the seams and mechanisms are less aerodynamic than a solid roof panel.

In real terms, this means an electric convertible will travel 10 to 15 percent fewer kilometres on a full charge than a closed EV with the same battery. If a closed model claims 400 kilometres of range, expect 340 to 360 kilometres in a convertible version. That gap matters most on longer journeys where you cannot charge mid-trip. City driving and short commutes feel the difference less.

The roof motor itself draws power when you open or close it—usually a small amount, but it adds up over time if you use the roof frequently. Leaving the roof down while driving also increases energy use because the car has to work harder against wind resistance. On a cold day with the roof down and the heater on, range can drop noticeably.

Charging and battery considerations for convertible EVs

Charging an electric convertible works exactly the same way as charging any other EV: a home wallbox, a public rapid charger, or a standard socket. The convertible body does not change the charging process or the battery chemistry. What matters is the battery size in the specific model you are looking at.

Most electric convertibles on the market today have batteries between 50 and 80 kilowatt-hours, which is mid-range for EVs. Charging from empty to 80 percent at a rapid charger takes 20 to 40 minutes, depending on the charger power and the car's onboard charging hardware. At home on a 7-kilowatt wallbox, a full charge overnight is normal.

Battery degradation—the slow loss of capacity over years—happens to all EVs at roughly the same rate, regardless of body style. Most manufacturers may provide the battery will retain 70 to 80 percent of its capacity after 8 to 10 years. A convertible's battery degrades no faster than a closed car's, but the weight and aerodynamic penalty means you will notice the range loss sooner because you started with less range to begin with.

Roof mechanism repair and maintenance costs

The retractable roof is a mechanical system with hydraulic pumps, motors, sensors, and seals. When something goes wrong—a motor failure, a hydraulic leak, a sensor malfunction—repair costs are high because the mechanism is complex and labour-intensive to access. A roof motor replacement can cost £800 to £2,000 depending on the model. A hydraulic system repair can be similar or more.

These repairs are not covered by the standard powertrain warranty on most EVs, which covers the battery and electric motor but not the roof mechanism. Some manufacturers offer an extended warranty that includes the roof, but you have to pay extra for it. Before buying, check what the warranty covers and what aftermarket repair shops charge for your specific model in your area.

Maintenance of the roof seals and tracks is straightforward: keep them clean, lubricate the tracks annually, and check the seals for cracks. This costs very little and prevents most problems. The real risk is a mechanical failure of the motor or hydraulic system, which is unpredictable and expensive.

Weather and safety with an electric convertible

An electric convertible is no safer or less safe than a petrol convertible in rain, wind, or cold. The roof closes just as quickly, and the car's structural rigidity is the same. What changes is that you have no engine noise to mask wind or rain sound, so the experience of driving with the roof down feels different—quieter, more exposed to weather.

In winter, the battery loses efficiency in cold temperatures, which reduces range further. A convertible already loses 10 to 15 percent of range due to its design; in freezing weather, that gap can widen to 20 to 25 percent. If you live somewhere with long, cold winters and you plan to drive with the roof down regularly, budget for shorter journeys and more frequent charging.

The roof mechanism itself works in all weather, but extreme cold can slow hydraulic fluid, making the roof open and close more slowly. This is temporary and not dangerous, but it is worth knowing if you live in a climate with harsh winters.

Cost comparison: convertible EV versus closed EV

An electric convertible costs roughly 15 to 25 percent more than a closed EV with the same battery and motor. That premium covers the engineering, manufacturing, and testing of the roof mechanism, plus the structural reinforcement needed to keep the car rigid without a roof. A closed EV might cost £35,000; a convertible version of the same model could be £42,000 to £45,000.

You also lose some boot space because the roof mechanism needs room to retract. Most convertibles have a smaller boot than their closed counterparts, which matters if you regularly carry large items. Insurance premiums are usually slightly higher for a convertible because the repair costs are higher and the car is more exposed to weather damage.

The decision comes down to a straightforward question: will you use the open roof enough to justify the extra cost, the reduced range, and the higher repair risk? If you live somewhere with good weather and you genuinely enjoy driving with the roof down, the premium might be worth it. If you are buying a convertible because it looks nice but you will rarely open the roof, a closed EV will serve you better and cost less.

What to check before buying an electric convertible

Before you commit to an electric convertible, test drive the specific model and operate the roof mechanism yourself. Listen for unusual sounds, feel how smoothly it opens and closes, and check that all the seals fit properly. Ask the dealer about warranty coverage for the roof system and what it costs to extend it.

Research the real-world range of the model you are interested in, not just the manufacturer's claim. Look for owner forums and reviews that mention range in your climate and driving conditions. If the car is new to the market, there may not be much long-term data yet, so be cautious about claims that sound too good.

Check the availability of charging infrastructure on your regular routes and at your destination. If you plan to take the convertible on long trips, map out rapid chargers along the way and confirm they are compatible with the car's charging hardware. An EV with reduced range due to its convertible design needs reliable charging access more than a closed EV does.

Finally, ask yourself honestly whether you will use the roof. If the answer is "maybe" or "sometimes", buy a closed EV instead. The convertible premium is only worth paying if you will actually enjoy it.

Frequently Asked Questions

Can you drive an electric convertible in the rain?

Yes, the roof closes quickly and the car is fully weatherproof when closed. If you are caught in rain with the roof down, close it—most take 10 to 20 seconds. The main difference from a petrol convertible is that you will hear the rain more clearly because there is no engine noise.

How much does it cost to replace a convertible roof motor?

A roof motor replacement typically costs £800 to £2,000 depending on the model and whether you use a dealer or independent shop. This is not covered by the standard powertrain warranty, so check what your specific warranty includes before buying.

Will an electric convertible lose more range in winter than a closed EV?

Yes. A convertible already loses 10 to 15 percent of range due to its design; in cold weather, that gap widens to 20 to 25 percent because the battery is less efficient and the hydraulic system works more slowly. Plan for shorter journeys and more frequent charging in winter.

Is an electric convertible more expensive to insure?

Usually slightly more, because repair costs are higher and the car is more exposed to weather damage. Get a quote from your insurer for the specific model before you buy, as rates vary by provider and your driving history.

What electric convertibles are actually available to buy now?

Options are limited. The BMW i8 Roadster is a plug-in hybrid, not fully electric. The Porsche 911 Cabriolet has an electric variant in development. The MG4 EV has a soft-top convertible option in some markets. Most other convertible EVs announced by manufacturers are still in development and not yet available for purchase.