Fake news said that perpetuum mobile is not possible. Take that, naysayers!
So does it go forward or backwards or just creates a black hole
Yes.
I’ve done this… I had 700w of solar panels on my car, that fed a 2kwhr portable battery, that fed the car charger. It’s only bought to get 15-20 mile/day, but it’s something.
I used it when I was cross-country traveling and was off-grid camping. It was mainly way I could get back to civilization after a week out in the middle of nowhere. Also made enough power to run my air fryer and computer/starlink setup.
Does the 2kWh battery go 0% to 100% in a single day? Or can you simultaneously charge it while discharging it by feeding a level 1 inverter to the car?
It depends on where you are and what the sunshine is like. I was in a place that got 9-10 hours of good sunlight and had clear days, so I was able to get 3 full charges and most of a 4th, but I can usually get 2 full charges on a clear day in most places I’ve been. My 700watts of panels were getting over 5-600w of hourly production for a good 4 hours.
If you charge your car off of it, the car can take the full battery in about 2 hours. Set the charge rate on the lowest setting and trickle charge off the solar.
You could scale up solar panels, if it’s worth the hassle to setup and break down portable panels, but there isn’t enough real estate on the vehicle to get much more wattage . I have 250w mounted on the top of the car and a fold-out 450w panel that I put across my hood and windshield.
Oh… and I have an wcoflow delta 2 battery… the inverter is built into it and I can charge and discharge at the same time.
Ah yeah, the ability to pass power in both directions at arbitrary rates seems pretty important for that use case. Otherwise you’d have to charge the battery with the sun, discharge the battery into the car (while presumably wasting good sunlight). The setup you have sounds like it avoids most of that.
So a good sunny day is good for what, 3 kwh into the car?
I’ve gotten as much as 4, but 700w of panels can vary… shade and heat play a big part in it. I also wasn’t super vigilant of putting up my portable panel, unless I knew I needed the power. When it was up, I generally got about 2.5, but it performed better when I was in places like the Mojave desert and the sun was completely unobstructed all day.
I also charged at a lot of level 2 chargers across the country, that are usually free, and could put power back on the 2kwhr pack from the cigarette lighter outlet in the car, so I generally stayed topped off before the sun even started shining. That’s why I didn’t always use the panels. Not necessarily something to plan into a daily routine if you aren’t traveling. It was a trade-off from having a level 2 chargers at my house.
It seems like electric cars are commonly parked outside in the hot sun all day, and so should have solar panels - it wouldn’t be all the power you need, but for the average driver it would be about a third of their total driving. Plus that if you do run out the solution is just wait a couple hours it a powerful (though in reality not useful) message. Solar panels could easially be shaped to the roof of the car and thus not affect aerodynamics (in quantities of the auto manufactures this is an option).
I want a retractable panel that covers my wind shield so my car doesn’t get so hot while I’m inside - this is a feature I’d pay for even if it isn’t cost effective.
We should be putting solar panels over parking spaces anyway, rather than over places where plants could grow. Combine that with electric vehicles that could plug into that infrastructure.
Agrivoltaics can be a net benefit for plant productivity depending on the region and field type. Pasture for sheep does fairly well, for instance, as grasses do better with some shade in a lot of cases. It reduces water requirements and simulates a lightly wooded or scrub area.
Devil, details, etc.
Putting solar panels over parking spaces is a terrible idea - it’s far more expensive, makes it far more liable to be smashed by some idiot, and requires high-embodied-emissions steel/concrete to car-proof your solar panels as a result (technically just car-resistant).
Meanwhile, car parks are a stupid symptom of car-centric design and should be phased out. Putting solar panels on a car park isn’t smart use of space, it’s just putting lipstick on a pig.
So… my 2kwhr battery provides about 6 miles of range.
You can use solar to get a little bit of mileage, but you aren’t talking much more than 20-25 miles a day under optimal conditions.
I’m not saying that putting solar panels and a battery/inverter/charge controller isn’t worth it, but it’s not good enough for most people to use to power travel. It would take a lot of charging to offset the purchase cost. I think I generally spend about $10-20 a month on electricity when I’m not traveling and charging at home and my setup cost around $1200 and an afternoon of install. The only reason it was a good solution for me was that I was working remotely and traveling all across the country. I spent most of my time in national or state parks, so I was stationary for 4-7 days at a time and it powered all of computer and cooking electronics.
The Fisker Ocean had that (they went bankrupt)
Or you may be interested in the Aptera which can add up to a claimed 40 miles a day on solar in ideal conditions.
I thought this was someone using the V2L function and running a gaming rig inside.
lol, who knows
Outta here with your FACTS and LOGIC! I’m glad mine has internal 120V outlets.
Usually the bones inside are limited to not many amps. The V2L would allow for a much higher draw.
I hope it’s not a gas generator inside…
dies from carbon monoxide poisoning
you can just put solar panels at the roof
Like big sails with wind power while you use the solar for air conditioning
Wat
Watt*
They’re pulling juice from a portable power station that’s being kept inside the car. The thing is that they’d better have a strong juice-generating build or else the weight of the battery itself quickly nullifies how much benefit it provides.
Actually I think they had an adapter for 220V outlet in the car or something similar since there was another cable out of the front door that looked like you usual home 220V/10A cable.
