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Our story

Julian and James Field, a father and son team based in Yorkshire, United Kingdom were inspired by the idea that solar powered vehicles might be a practical possibility for everyday use. In the autumn of 2013 they began to design a proof of concept vehicle stipulating that it had to be practical, affordable and road legal. In early 2014 their design was completed and a prototype built and by the summer the vehicle, named SPV1, began to undergo road testing.


SPV1 performed better than expected, achieving workable top speeds and a useful range. Its battery had a re-charge time of 3 hours under normal daylight conditions offering freedom from charge-up points. Higher top speeds could be reached by increasing the motor power and greater ranges achieved by adding storage capacity to the battery.

Modelling work carried out demonstrated that in countries where solar irradiation is higher than 5 kWh/m2 throughout the year, solar cars can meet much of the transport needs that are currently being provided by highly polluting legacy vehicles. 

Encouraged by the performance of SPV1 and recognising the commercial potential of a solar car, the pair founded Solar Transport Systems Ltd and began work on a production vehicle. Seven years and over 5,000 engineering hours later the INTI was born. Named after the ancient Incan sun god, a prototype of the INTI is now in pre-production testing and a commercial launch is planned in 2022.

The INTI in numbers

30 engineers and designers

12 nationalities

Over 5,000 engineering hours

Top speed: up to 60mph

Range: up to 80 km

Kerb weight: under 400kg

Price: under $20k

CO2 emissions: None

Fuel cost: None


The team

We would like to acknowledge our fantastic team of engineers and designers

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