World’s Most Efficient Family Car

Our connected traffic application helped Stella Vie win the World Solar Challenge 2017

Racing towards efficient cars with Ericsson’s connected traffic application

A sleek, shiny vehicle powered by solar energy speeds across a red and rocky desert landscape. Using a connected traffic application called the Solar Navigator, this vehicle can find the most efficient path through the forbidding terrain.

Though it may sound like the opening to science fiction film, the vehicle in question is no spaceship, but a family car (or at least a look at the family car of the future). Named the Stella Vie, this experimental solar-powered car raced 3,000 kilometers across the Australian outback to win the World Solar Challenge in October of 2017.

Carrying 3 to 5 people at a time and using 48 kWh per km, Stella Vie averaged 69 kph to win the 2017 race. Demonstrating just how efficient the car is, at the end of the competition, Stella Vie had collected a surplus of energy that was fed into the power grid.

The victory for Stella Vie demonstrates the benefits of automotive IoT and the connected vehicle ecosystem. That’s a victory for all of us, as connected traffic begins to make our cities greener, safer and more profitable.

World Solar Challenge

Solar Team Eindhoven are on a winning streak

The Stella Vie was designed, constructed and driven by team Solar Team Eindhoven (STE), a multidisciplinary group of 21 students from the Technical University Eindhoven in the Netherlands. The car was built to compete in the World Solar Challenge, the world’s ultimate race for solar-powered vehicles.

STE won their division at the World Solar Challenge in 2013 and 2015, but the team wasn’t resting on their laurels, they were ready to defend their title again in 2017. As Stella Vie raced alongside 41 other teams on the route from Darwin to Adelaide, it was clear their competitors had been hard at work on new designs and leading-edge technologies.

To stay ahead of the pack, Stella Vie used the latest vehicle-to-everything (V2X) technology, and a solar navigator app. This connected traffic application was helps Stella Vie move past their competition as efficiently as possible.

A proving ground for technology

The purpose of the World Solar Challenge is to provide teams a testing ground for new technology. Every two years for the past 30 years, the World Solar Challenge committee has invited teams from around the world to push the limits of vehicles powered only by solar energy.

There are three classes of cars which participate in the challenge today, the challengers, cruisers and a non-competitive class. A member of the cruiser-class vehicles, Stella Vie is designed as prototypes for a practical, family car that can run on solar power.

Stella Vie use V2X technology - and it looks futuristic enough

Energy positive solar cars

Solar Team Eindhoven is demonstrating how solar-powered cars can be a viable option for transport in the near future. Stella Vie uses V2X technology to travel through traffic as efficiently as possible, which leads to a lower overall energy expenditure.

Being so economical, Stella Vie generates more energy than is required for the needs of an average family. The car can feed energy into the power grid, thus creating a energy positive transport solution.

More than being just energy efficient, the cars participating in the World Solar Challenge must be tough enough to travel across one of the world's most challenging landscapes. The extreme conditions the cars withstand serves as proof that the solutions used in the Stella Vie can be applied in real life.

Innovation requires collaboration

To win the challenge, the team behind Stella Vie combined their knowledge of automotive design, smart power grids, intelligent transport systems and connected infrastructure. Solar Team Eindhoven exemplifies the cross-industry collaborations that are needed to make the most of intelligent transport systems .

The solutions used for Stella Vie brings together all the divergent parts of the connected transport ecosystem, with the goal of creating a better standard of living for all. Working with Solar Team Eindhoven, we were able to create a customized prototype drawing data made available through Ericsson’s vehilcle cloud solutions.

An example of how these are used in real-life can be seen in the Talking Traffic project in the Netherlands, where the Dutch traffic authority is utilizing the cloud and IoT to maximize traffic flow without costly investments in new infrastructure.

In 2016, The Dutch traffic authority tasked Siemens, Simacan and Ericsson to create a nationwide intelligent transport system that would maximize traffic flow on existing roads, rails and waterways. Six months later, the consortium rolled out a cloud-based platform that collects and shares data between infrastructure, vehicles and people. The connected vehicle platform utilizes both short- and long-range communication technologies to create a smart traffic ecosystem. Our vehicle cloud platform serves as the front door of the Dutch infrastructure systems, allowing all stakeholders to cooperate.

Fast is not enough, Stella Vie is smart

Ericsson began sponsoring Solar Team Eindhoven in 2015 as the team geared up to compete in the premiere of the cruiser-class at the World Solar Challenge. STE’s previous car, the Stella Lux, was equipped with Ericsson’s Solar Navigator, an in-car app that aggregated data on weather, traffic and car performance to optimize the team’s route.

The Solar Navigator app communicated with the Connected Urban Transport to anticipate upcoming events on the road. With queues from the app, the driver could adjust accordingly. By minimizing braking and acceleration, the Solar Navigator helped conserve the energy that pushed Stella Lux over the finish line in 2015.

In 2017, Stella Vie was equipped with the new Solar Navigator app, upgraded to incorporate topography and elevation data, which was applied to ensure the car was in the sun as much as possible, both on the road and when parked.

A solar navigator app is used for route optimization

Our connected traffic application

Connected vehicle platforms makes it easy for industries, including transport, to work with connected cars and other devices, often provisioned as a cloud solutions that feeds in-car applications with valuable data from the traffic ecosystem.

The Solar Navigator is a customized version of a connected traffic application, designed to make smarter, connected traffic a reality. This application helps optimize a vehicle’s journey by taking into consideration near-real time information from public officials and road authorities, other vehicles on the road, and connected sensors in infrastructure such as traffic lights.

Efficient driving is encouraged with suggestions from the app. A tablet-sized monitor in the car changes color to prompt drivers to brake or accelerate. The app also tells the driver how long they have until the traffic signal ahead turns red or green.

The traffic light feature helps reduce accidents and allows vehicles to move more efficiently through intersections. Less acceleration and idling contributes to lower energy consumption and reduced emissions. This is an example of how connected transport can make a real difference in the air quality of our cities.

An easier way to drive – and park

Based on the driver’s destination, our connected traffic application plans a route incorporating data on weather, traffic congestion and road conditions. For Stella Vie, local weather, topography and elevation are tracked to enable maximum exposure to the sun.

Once drivers reach their destination, the app guides them to an open parking space that will fit their vehicle, even if it is a 4.6 meter-long carbon-fiber solar car. This feature is valuable in terms of the time and energy saved, but also as a way to connect service providers directly with drivers with an easy path-to-purchase.

connected traffic application

Breaking data out of darkened silos

Team Eindhoven’s main challenge was to deliver a practical family car that is energy efficient. Efficiency can be achieved when you have information from the road ahead of you, such as the behavior of the next traffic light. Much of this data exists somewhere, but it's not yet in our cars.

Today, there is a lot of data collected on how our roads, rails and waterways are being utilized. Unfortunately, a lot of that information is unused, or is used ineffectively.

Currently, various stakeholders have useful data stored in dark silos. Connected vehicle platforms integrate near real-time data from cars and the infrastructure to make travel safer and smoother. To achieve that, standardization is needed and silos must be eliminated.

The Netherlands serves as an example of how the cloud can become a meeting point for many different stakeholders in the traffic ecosystem. Stakeholders in the traffic ecosystem are beginning to understand the value of their data. With connected vehicle platforms, it is becoming easier for governments, transit authorities and authorities to better utilize the cloud and IoT.

Connected Urban Transport

The value of data in the traffic ecosystem

With a smart traffic solution, the public sector can optimize existing infrastructure and avoid the costs of expansion. By opening up the aggregated data collected in the traffic ecosystem, road and transit officials can also encourage third-parties to develop valuable apps and services.

By looking at driver and vehicle behaviors, software developers and service providers can find new market opportunities that make the entire ecosystem more profitable, and thus, more sustainable. Connected Urban Transport makes it easier to build symbiotic collaborations between private and public organisations, each with their own knowledge and skill sets.

With Ericsson’s Connected Urban Transport, the world’s growing cities have a tool to develop, rollout and monetize exciting new mobility solutions. We don’t need to wait for the perfect solar car to increase efficiency on our roads. By enabling secure data sharing across the entire transport system, we will soon see changes for the better.

connected traffic ecosystem

How the power grid fits in the connected traffic ecosystem

In the Australian outback, collecting solar energy is no problem. But In climates similar to STE’s home in the Netherlands, solar rays can be a scarce commodity during many months of the year. But according to STE’s calculations, their cars are capable of driving at least 40 kilometers, even in dark, rainy conditions.

40 kilometers is more than the average daily travel distance, but for longer journeys cars will need to switch between power sources. Vehicles must interact with smart power grids to recharge batteries when needed, and to feed electricity back into the grid when possible.

One feature of the solar navigator used in the Stella Vie shows drivers how much energy is saved using solar power, as compared to standard, fossil fuel-sourced power. In-car energy levels are continuously monitored to predict the range and energy levels at destination. In a real world setting, this feature can prompt drivers (or cars) to switch between fuel sources, and encourages the use of sustainable power.

Complex, multi-party payment models come into play when cars charge-up or share energy with the power grid. Energy providers, network operators, vehicle owners and other players need a fluid way to manage payment schemes.

The potential to make cars energy positive has huge implications on mobility. The car doesn't have to be a barrier to a sustainable society, it can become an enabler to a greener economy.

future of connected traffic

A win for the future of connected traffic

Of the 12 cruiser-class cars that started the World Solar Challenge, only six finished. Stella Vie came in first, proving that connected traffic applications like the Solar Navigator can produce real results in challenging situations.

The technology that helped Stella Vie succeed is already contributing to more efficient mobility in places like the Netherlands. The Dutch traffic authority has harnessed data to improve everyday life not just for commuters, but for everyone.

In essence, the Stella Vie’s victory is a win for all of us who look forward to cleaner, safer and more profitable cities.

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