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Johan Empa

This solar panel is about 200 cm times 40 cm and 2 mm thick. Made by Heliatek. It's pretty neat. With glue on the back it's just a matter of pressing it onto the wall and plug it in.

Probably falls off 😅, unless it's superglue? 🤔

Because it's soft, glued and light it can be installed in other places than normal panels.

On curved roofs and walls for example.

Solar panels and solar film will change the world.

There are laws around electricity but anyone can install a solar panel.

Attaching a panel to a roof or glueing a film onto the wall is on a whole other level than installing a nuclear power plant.

Adding solar capacity could be extremely much faster than adding nuclear capacity. There are billions of people capable of installing solar panels. Billions, and the panels can be installed everywhere.

@JohanEmpa that is neat, do you know how efficient it is at generation?

@buerviper @Ruth_Mottram @JohanEmpa I had no idea they were that good already! I remember when the best crystalline cells in a lab were just 17%.

How good are commercially available organic cells?

@JohanEmpa The REALLY neat thing about solar future, is the combination with EVs. Since solar only powers when sun is up, storage of electricity is important.

And then we get EVs with bidirectional charging, and the storage problem is solved...

Peoples dependency on grid companies can be drastically reduced.

@TomSwirly @JohanEmpa An EV "require" 7.2kW to charge, where do you get that from? Mine is happily pulling 1.3kW right now. My panels can deliver a max of 3.6kW, I only have 9 panels on ,y roof. Guy down the road has some 20 of them. Even my 9 is plenty to charge the car.

Anyway, this was about using EVs bidirectional charging capabilities to store solar energy and put it back when needed to balance grid. An EV isnt charging all the time...

@panduck @JohanEmpa

> Where do you get that from?

I did post the source in my answer.

---

More technology will not fix the problems of too much technology.

I posted this article before on this thread: thehonestsorcerer.medium.com/s

We cannot continue our exponential growth in consumption and waste by simply consuming something else. People are emotionally attached to buying new stuff to solve old problems.

Degrowth, reducing consumption, is the only solution.

@TomSwirly @JohanEmpa Well, since my car is currently pulling 1.3kW, I would say your source is wrong. And producing EVs instead of gas cars is not growth, is change of technology. And while we need to replace cars with public transport as much as we can, we are not able to stop sale of cars now, this is simply not doable.

I am getting so dang fed up with this "degrowth is the solution" ANY TIME EV is mentioned.

Gas cars must die. EVs is the only short term option we have.

@TomSwirly @JohanEmpa Your source is using logic equal to "a power outlet requires 2400w", and that becomes a bit silly, sorry. The charge plug I have can provide 11kW, but I rarely ever pull more than 1.3kW to 3kW, depending on how much my panels are producing. As a result, me charging my car is barely affecting network load at all.

@panduck @JohanEmpa

There are a billion cars on the planet. Building a billion EVs will not fix the problem of exponentially increasing consumption and waste.

Oh, I don't think anything will change or that degrowth will ever happen.

We'll continue to consume at an exponentially increasing rate until everything comes down.

Instead of being "fed up", perhaps you could answer the question of how unbounded exponential growth is possible in a finite world?

@TomSwirly @JohanEmpa So, you rather them build billions of gas cars instead? Because that is what will happen.

We need to replace cars with public transport as much as we can.

What we cannot, we need to replace gas cars with EVs.

We are not talking about building a billion EVs in addition to a billion gas cars. We are talking about building EVs instead of gas cars.

That we need to reduce the size of and amount of cars is a different debate. Take that seperately.

@panduck @JohanEmpa As I said, replacing (note that word) one billion gasoline cars with one billion electric cars will not solve the issue of exponentially increasing growth of resource consumption and of waste.

How, exactly, is unbounded exponential growth possible in a finite world?

I remember hearing your arguments almost 50 years ago and believing them: but statista.com/statistics/276629

Producing more but different things will not fix this. Our only hope is to produce fewer things.

StatistaGlobal CO2 emissions by year 1940-2023 | StatistaAnnual global carbon dioxide emissions have increased by more than 60 percent since 1990 and are now at their highest ever levels.

@TomSwirly @JohanEmpa We have two options: When a gas car has lived its life and need to be replaced with a new car, it can be replaced with an EV or it can be replaced with a gas car.

Those are your two optuions.

Pick one, please. One of those two.

Because for all the people that sadly depend on cars, there is no other option.

None.

Give them an alternative first, and they can pick that.

Right now, the alternative is not there.

@panduck @JohanEmpa

> Give them an alternative first,

"First" implies that something will then change. But your plan prevents that change.

Building a billion electric cars will increase people's dependency on private transportation.

A car lasts 20 years, so another way to see this is 50 million cars a year for the rest of time.

You have a plan to continue exponential growth in consumption and waste, but simply change what's being consumed and wasted.

@TomSwirly @JohanEmpa ""First" implies that something will then change. But your plan prevents that change."

No.

We can do two things at the same time

1) Build better public infrastructure so more people can use public transport.
2) Build EVs instead of gas cars, so that cars that are sold, are EV instead of gas.

You are acting like you cannot do 1 and 2 at the same time.

We are talking about cars that would be built regardless.

Your argument is that it is better that they are gas cars.

@panduck @JohanEmpa

Unbounded exponential growth is impossible on a finite planet.

But your plan calls for continuing unbounded exponential growth indefinitely: the same plan as 50 years ago, which has completely failed.

----

> Your argument is that it is better that they are gas cars.

Well, you have passed the bounds of politeness with that last claim. Shame on you.

I will not be communicating with you further.

You seem young: I hope you remember this in thirty years.

@TomSwirly "You seem young: I hope you remember this in thirty years"

Thirty years from now when I watch the planet burn, I'll remember a person trying to shame me for doing what little I could with the options that were available to me, because they were not enough.

If you think being called out for being abelist and privileged, and feel that this is passing "bounds of politeness" then boy do I have news for you.

Now, get off the internet, you are using more resources than you need.

@TomSwirly @JohanEmpa My plan is at least a plan. We do not replace the current cars with EVs, we replace a production of a gas car with the production of an EV.

You have no other plans other than being upset with this plan.

That does not sound like much of a plan to me.

@panduck @JohanEmpa A plan would involve treating the climate crisis as an existential emergency, redirecting some of the trillions the US spends on fossil fuels and war into public transportation, and moving aggressively to get rid of private cars in the next two decades.

You're quite right that none of this will happen. We'll just keep consuming and die.

@TomSwirly "You're quite right that none of this will happen. We'll just keep consuming and die."

So what is your plan? Sitting there griping at a "better than nothing" plan because it is not "good enough" for you?

Present a plan, or you are nothing but a troll griping about "your not being good enough".

I am not going to be shamed for having a car so I can transport my disabled mate.

People like you talk from an abelist point of privilege, but offer no real solution.

@TomSwirly At least "my plan" removes dependency on the worst companies in the world: the oil companies.

This is a major important step towards degrowth.

Your plan is to go along like nothing because "the other plans are not good enough anyway."

@TomSwirly @JohanEmpa Your "EVs are not the solution we must degrowth!" argument anytime EVs are being debated is a song the gas companies love to hear. Because to them, it simply means "buy a gas car instead".

PLEASE STOP THIS!

You can argue why we need to build better public transport to get as many people away from cars as we can, but ANY CAR MADE SHOULD BE AN EV EVEN SO! That does not equal "exponential growth", that is NONSENSE.

@panduck @JohanEmpa

It would be better to address my arguments, rather than to use the CAPS KEY.

@TomSwirly @JohanEmpa I pointed out how your arguments are not really arguments, but flawed assumptions, and caps keys are a result of being somewhat frustrated with having to repeat this over and over any times EVs are mentioned and people like you show up.

We are not REPLACING gas cars with EVs, we are asking them to build and sell an EV instead of buying and selling a gas car, and if they dont build it as an EV they will build it as a gas car. No matter how much you talk about "degrowth"

@TomSwirly @JohanEmpa As a result, all you do, is defend the position of the gas companies, since way too many people are totally dependant on cars, and the option is either to buy gas or to buy EV.

You ignored everything I wrote about this and focused only on the fact that I used caps to convey my frustration.

@panduck @JohanEmpa

Oh, I don't think degrowth is going to happen, as I said.

No, we're going to keep exponentially consuming and exponentially wasting all the way.

What are my "flawed assumptions" exactly?

Unlimited exponential growth is impossible in a finite world. I have mentioned this half a dozen times. You might consider addressing this key point.

@TomSwirly @JohanEmpa "What are my "flawed assumptions" exactly?"

That people will be able to pick an option that is not available to them.

That we somehow by saying "we need degrowth!", we suddenly remove our dependency on cars.

You argue like we are not capable of scaling down production of cars, while at the same time producing EVs instead of gas cars.

It is easy to toss out "degrowth", but you have so far not provided any means as to how.

@panduck @JohanEmpa

I do entirely understand your argument, you know.

You're saying this: "We will never have public transportation, so we should continue to build exponentially increasing number of private cars."

It's the same argument I've heard for 50 years. It has been leading Americans not to build public transportation for 70 years, and I'm sure you're right that this will continue until the collapse.

Unlimited exponential growth is mathematically impossible on a finite planet.

@TomSwirly "You're saying this: "We will never have public transportation, so we should continue to build exponentially increasing number of private cars.""

No.

Nowhere did I say that.

I said we need to reduce our dependency on cars.

I said that the cars we still need to build, has to be EVs.

You are talking from a point of privilege. Many people dont have an option, we need a car to take us where we have to go.

We need to build options.

@panduck @TomSwirly @JohanEmpa it's all about battery capacity and time to charge.

A typical ev battery has 50kWh capacity
So it would charge from zero to full in a little over 2 hours on a high speed 21kW charger, or that same charge would take 7 hours at 7kW.

In practice batteries are rarely empty and rarely need a full charge. Also their charging circuitry often limits charging rate (kW). So if I had a standard 3.6kW domestic array I could happily use it to opportunistically charge my EV

@TomSwirly @panduck The size of the solar panels doesn't matter, the difference is covered by the grid.

@JohanEmpa now that I leave in an apartment this would be a nice way to block the sun in the warmer days and generate electricity at the same time, instead of just having to use blinds and reflect that light away. So I'll put it in blinds, or canopies.

@adelgado The combination of canopies giving shade and generating electricity would be pretty good.

@JohanEmpa Spaniards were talking on how installing canopies in their windows helped keeping the house cool allowing air to flow across the house without letting the sun get in, making AC not totally necessary, but adding power generation could make it even for when AC is needed (>40º in the shade). But that company doesn't talk about cost. Canopies are affordable, but a expensive canopy won't be a good option for an average household in warm areas

@adelgado I assume these solar films are too expensive for everyone except companies pioneering it, but they seem to have the potential to be mass produced.

On the same theme, having regular solar panels on the roof and running the AC on that will become common. It's amazing how we invented a way to solve the problem of too much sun by using the sun to remove the heat.

@JohanEmpa I like the potential of the flexible panels been installed without full building permissions and infrastructure, it has potential for the small installation once the price goes down. Big buildings can have normal installations and probably with better return of investment

@JohanEmpa looked on their website but can't find energy output. i use a thin stiffer panel in my car to trickle charge the battery - claims 20w @ 12v