Comment on ‘World’s first off-road solar SUV’ just drove across Morocco powered only by the sun
Ilovethebomb@lemm.ee 11 months agoYou wouldn’t, there is actually very little energy in solar for an array the size of a vehicle roof, and it would likely take days to recharge.
JJROKCZ@lemmy.world 11 months ago
I can’t YET, this is clearly early technology, in a few years who knows. Remember we went from not being able to fly to landing on the moon in a lifetime
vrighter@discuss.tchncs.de 11 months ago
nope. not “yet”. just not physically possible. even with 100% efficient panels.
There just is not enough energy in the sunlight hitting the car. You would have to somehow make the sun shine brighter. Which is not really possible.
Phen@lemmy.eco.br 11 months ago
The amount of power is limited, but can’t the tech improve to make cars that require less power?
vrighter@discuss.tchncs.de 11 months ago
you can make the engine more efficient, but at some point there is a minimum amount of energy needed to get the thing moving and they are already quite close to fully efficient. To reduce energy needed any further you can make the car lighter, but that obviously cannot be improved indefinitely.
Gsus4@mander.xyz 11 months ago
Wait wait, how are you calculating that? If you take a generic solar irradiance of 6kWh/day/m^2^ and let’s assume the car has a solar panel area of 3m^2^ with a solar panel efficiency up to 30% and the cosine for solar angle (say ~0.7), given the best 137 Wh/km around, that gives around 30km a day. That’s already enough for my commute.
All this neglects shade, won’t work for all latitudes…but it can also be upgraded with improved battery storage/weight, improved solar panel efficiency and maybe even the area of the car top and shape of panels can be improved (e.g. make them extendable). At worst, you just top it up to 500km from the grid every weekend and that will make up for the difference.
Waraugh@lemmy.dbzer0.com 11 months ago
I have a golf cart I use for most of my short drives. I’ve been thinking about putting solar on the roof and figuring out how to do all these calculations so I can decide if it would be worth it based on my use case. I like to keep it in my garage out of the weather when I’m not using it unfortunately. Feel like it will last me forever if I take care of it like that instead of leaving it outside and in not sure if Solar would be worth it for while I’m driving or out at the store or visiting someone.
Metacortechs@lemmy.world 11 months ago
Fuck, don’t give them ideas, climate change is bad enough as it is…
Ilovethebomb@lemm.ee 11 months ago
The problem is, there just isn’t that much energy in sunlight, so even a perfect solar panel that captured 100% of the sun’s energy wouldn’t get you very far.