‘It keeps on going’: driving the world’s first production-ready solar car

theguardian.com:

Winding past the ochre-coloured plateaux of the Bardenas Reales natural park in northern Spain, Roel Grooten nudged me to take my foot off the accelerator.

The car continued to barrel down the open stretch of road, its speed dipping only slightly. “It keeps on going,” said Grooten, the lead engineer for the Dutch car company Lightyear, as we whizzed through the lunar-like landscape. “What you feel is nothing holding you back. You feel the aerodynamics, you feel the low-rolling resistance of the tyres, of the bearings and the motor.”

It is this streamlined design that the company credits for allowing it to muscle its way into a space long overlooked by most car manufacturers. As early as November, the company will start delivery of what it describes as the “world’s first production-ready solar car” – the Lightyear 0, a €250,000 (£215,000) sedan draped in 5 sq metresof curved solar panels that top up the electric battery while the car is driving or parked outdoors.

“If we would have the same amount of energy that we harvest on these panels on any other car that uses three times the amount of energy to drive, it becomes useless. It becomes a very expensive gimmick,” said Grooten. “You have to build this car from the ground up, to make it as efficient as possible, to make it this feasible.”

In optimal conditions, the solar panels can add up to 44 miles a day to the 388-mile range the car gets between charges, according to the company. Tests carried out by Lightyear suggest people with a daily commute of less than 22 miles could drive for two months in the Netherlands without needing to plug in, while those in sunnier climes such as Portugal or Spain could go as long as seven months.

But whether the company’s gamble on solar will