Building a solar-powered off-road truck (based on a 712M Pinzgauer)

Project Ecarus

New member
We wanted to let you guys know that we are currently developing a solar-electric Pinzgauer. Right now, Hannes and Francois Duez (of AVS, France, AKA tech mastermind behind the electric Pinz) are burning the midnight oil to start testing the first prototype as soon as possible. Once the base vehicle is electrified and fully kitted out, we will do a major overland test expedition. Imagine the kind of autonomy you could achieve with a solar-powered 4x4 or 6x6 (in our case), away from roads and electricity grids. That's the dream we are chasing. Is it possible? Only one way to find out
;)


You may be interested in the specs of our solar system: We have developed a rig that makes a massive 13Kw solar system portable and flexibly deployable when you are parked, but fits into the Pinz weight and size wise when rolling. Our ambition and hence the system size is to recharge the 85KWh battery pack in one single (sunny) day.

There's just over 1 Kw permanently exposed (roof and one side) for a nice trickle charge and auxiliary power, and ca. 12Kw fold-out when you set up camp. Assembling this design, testing and integrating it with other charging/BMS software is the challenge we embark on right now. The panels arrived safely last week, which is a big step in the right direction.

Of course, travelling on sunshine will mean embracing a new kind of travel and really finding out the meaning behind the old saying "the journey is the reward". We'll need to plan carefully and select our camp sites accordingly, as we'll need natural "real estate" that can accommodate our chunky solar plant.

Last but not least, in case you are into automotive history: we just posted an interview with one of the "fathers" of the Haflinger and Pinzgauer - Dr. Rudolf, who was at Steyr-Puch 1955-1987 and was key to the development of both of these legends, as well as the G. (In fact, one of the first drawings of the Haflinger was his!) Yes, the gentlemen is still alive and kicking at 92, and lives not far from us here in the home of Steyr-Puch in Austria.) Spoiler alert: he is pro EVs
;)


You can check out the interview here: https://projectecarus.com/blog/meeting-mr-pinzgauer

I'm attaching pics of the test vehicle, base vehicle and 3D model, and will keep this thread updated as progress continues. For more regular updates, you can check out our website at www.projectecarus.com and/or subscribe to our newsletter here: https://projectecarus.com/signup.

That's it for now, more to come. Please let us know what you think of Project Ecarus.

All the best,

Lisa & Hannes

PS: Please note that there are two vehicles on the pics – there's ECARUS, our yellow 712 (6x6), and there is a 710 (4x4), the test vehicle, used to configure the electric motor, battery and management system. This helps us make sure the kit will work seamlessly as a "plug and play" system in other Pinzis and also allows us to work on ECARUS' expedition shelter and foldable solar system while Francois works on the electric drive.

5_ECARUS_Prototype_FRONT.png7_ECARUS_Prototyope_DASHBOARD_LR.png6_ECARUS_Prototype_SIDE.png3_ECARUS_CABIN.png2_ECARUS_BASE.png
 

luthj

Engineer In Residence
85 kwhr is good about 125 miles (200km) of range at 50mph (80kph)? Could be even less with the Pinz Aero and drivetrain losses? The good news is you could recover that in a day with good sun. A larger pack would make more sense, but you are probably running into packaging issues with the current drivetrain, and limited contiguous space for battery modules.
 

luthj

Engineer In Residence
A 13kw system is going to be over 600 square feet. With glass faced panels you are looking at at least 1,000lb of panels. The only reasonable way to do this and have payload left for actual gear, would be some type of thin film panel, or plastic faced bare cells on composite substrate? Even then, you need a method to deploy 600 square feet of panels in a way that doesn't take days to setup, and can survive moderate winds.

I don't see any easy solutions...
 
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shade

Well-known member
Cool project. Travel time will have to be less of a priority than making it on time to scheduled events.


If a solar powered airplane can fly around the world, it's time to see what can be done on the ground. I know they're going full solar, but I wonder how quickly the battery can be charged by grid power for more flexible charging.
 
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Project Ecarus

New member
85 kwhr is good about 125 miles (200km) of range at 50mph (80kph)? Could be even less with the Pinz Aero and drivetrain losses? The good news is you could recover that in a day with good sun. A larger pack would make more sense, but you are probably running into packaging issues with the current drivetrain, and limited contiguous space for battery modules.
That's exactly it, we had to strike a balance between range and efficiency. At some point, the weight of the batteries offsets additional range they would bring, especially offroad. Also, though the Pinzgauer could carry a lot more weight, we also had to consider the cabin and the solar system. With this set-up, we are hoping to achieve a doable travel rhythm both on and off-road. We'll know more once we start testing in different kinds of terrain.
 

Project Ecarus

New member
The bad news is you could be stuck for days with no sun.

I'll be the pessimist and say this will not be a successful overlander. Hope I'm wrong.

Sent from my SM-G973U using Tapatalk
Yep, we know this may not work. I suppose it all depends on how you define successful overlanding. We are looking to maximise autonomy, while minimising emissions. Which entails not just new technology, but also a new approach to travel. More time + more freedom = more adventure?
 

Project Ecarus

New member
Details will be interesting to see for sure! Curious what they are planning for capacity and where they're carrying them all.
Hey, thanks! Here are more details about our concept, as it stands now: https://projectecarus.com/vehicle. The capacity of the solar rig will be 13 kw, consisting of light-weight panels that can be deployed flexibly. This will require some space, obviously, meaning we'll need to pick campsites accordingly.
 

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