jandrese
15 hours ago
Generally the problem with carpark solar is the mounting solutions are low volume niche products that cost way more than traditional ground mounts. My biggest hope is that this policy creates a marketplace with actual competition that comes up with more cost efficient mounting solutions that make it practical worldwide.
Parking lots are horrible. They're butt ugly heat islands that take up way too much space. While adding solar on them doesn't solve the last issue, it does help mitigate the heat island effect and solar panels are no less ugly than asphalt. Plus it is power creation right next to where it is being consumed for minimal transfer losses. It's also much nicer for the vehicles parked there to be in the shade.
testing22321
14 hours ago
I’d much rather look out across a city and see solar panel islands rather than a coal smoke stack belching smoke, a nuke cooling tower or a massive dam.
Just because old school power generation is often out of sight, it shouldn’t be out of mind
ACCount37
13 hours ago
I don't mind things like huge cooling towers or massive dams. They're majestic in the same way ancient pyramids are majestic. On top of being useful infrastructure and not just oversized landscaping pieces.
JoeAltmaier
12 hours ago
Trivial national production compared with a single dam.
bobthepanda
10 hours ago
The problem with dams is that for the most part in the West all the good sites near population centers have been taken. In developing countries you have the issue of new dams potentially making older downstream ones less useful, which is now a real conflict point with Egypt vs Sudan vs Ethiopia, Afghanistan vs Iran, China vs India and SEA, etc.
In addition, because silt will back up in reservoirs there are an increasing amount of old dams where removal makes more sense than spending more money on dredging and maintaining the dam; and with droughts becoming more common hydro is not as reliable for baseload anymore.
thelastgallon
13 hours ago
The asteroid that hit the planet and made dinosaurs go extinct was pretty majestic too! It was a sight to behold: https://www.youtube.com/watch?v=vq3nWnTkFbk
1.1 to 1.2 billion tons of coal ash are produced each year globally from 9 billion tonnes. These are pretty majestic for kids to roll in and have fun.
Forbo
13 hours ago
ACCount37 expressly left out the coal smoke stacks from their description, so I'm not sure why you chose to focus solely on that and throw it back in?
thelastgallon
12 hours ago
What are cooling towers for if not for coal smoke stacks?
ascorbic
12 hours ago
Nuclear
cultofmetatron
11 hours ago
the clouds comming off nuclear towers is literally just steam. not radioactive steam. just.... steam
hvb2
9 hours ago
That's not even unique to nuclear. Gas and coal can have them too. Typically they're only used if the other source of coolant is not sufficient.
For example, you take in cooling water from a river. When the river gets too hot in summer you want to use that cooling tower to evaporate water to provide additional cooling.
Which also explains why it's steam
wakawaka28
9 hours ago
What about the billions of tons of solar panels that turn to toxic garbage every 20 years or so, and can't yet be recycled? Not to mention the huge amount of land consumed by solar farms.
tomrod
14 hours ago
I don't mind nuclear. Good for base load.
boshomi
13 hours ago
Base load becomes very expensive under free and fair market conditions. The reason is simple: wind and PV are extremely cheap, and surplus capacity costs little. PV module price in EU is just 0.086 UDS/W fob. Wind turbine price in China ~2200Yuan/kW inclusive tower.
In a free market, this leads to attractive conditions for batteries, and that is where the problem of base load begins: there is a lack of real demand, and base load then remains unused because its OPEX cannot compete with wind and PV.
There's just one problem. There is virtually no free and fair market in the electricity market. Utilities lobby very successfully for highly regulated markets to protect their monopolies. Nuclear power requires massive government protection from competition, which makes it attractive to utilities.
tbrownaw
13 hours ago
This is a prediction of the future, not an observation about the present / past like it's phrased as.
boshomi
12 hours ago
no, this are real world prices
https://www.infolink-group.com/spot-price/ https://wind.in-en.com/html/wind-2462559.shtml (chinese example)
BESS 5MWh 52 USD/kWh: https://www.metal.com/Battery-Cell-And-Module/202407100001
Yes, electricity is becoming very cheap in China, and it will be difficult for the West to keep up here. Exorbitant US tariffs are also counterproductive, as they only serve to secure monopoly profits for old utilities.
hinkley
12 hours ago
We are already cresting that hill. It’s happening now. It’s not happening everywhere, but it’s already happening.
fellowmartian
13 hours ago
Nuclear is attractive? Are we living on the same planet? I wish it was attractive but it’s quite obviously the opposite.
Reason077
12 hours ago
> ”I don't mind nuclear. Good for base load.”
Everyone who has an electricity bill or pays taxes should be against new-build nuclear power because it is pretty much the most expensive way to produce electricity. You should instead lobby for wind, solar, and even closing coal power plants in favour of modern natural gas plants. All of those will cut more emissions, more quickly, per dollar spent.
seb1204
12 hours ago
Base load is something of the past. Base load does no longer exist as such as during daytimes the solar curve will / should push it to zero as surplus capacity is cheap. Running base load plays at night is then also no longer sensible.
jama211
3 hours ago
Given the trend line of the cost of renewables + storage, by the time you’ve built one if you start now we could’ve done it cheaper and easier with renewables in most locations in the world.
rayiner
12 hours ago
What’s wrong with a nuke cooling tower?
rainsford
9 hours ago
I admit this is subjective, but they're giant ugly concrete chimney-like structures spewing stuff into the air. Sure, intellectually I know it's just water vapor and they're form is dictated by their function, but they look like they belong in some pollution riddled dystopian hellscape.
I'm actually pro-nuclear power, but the cooling towers are a pretty significant eyesore and a non-trivial downside. But apparently some people hate the way wind turbines look while I think they're sleek and futuristic looking, so taste as ever is subjective.
rayiner
6 hours ago
They’re elegant structures venting water vapor into the atmosphere. It looks like clean power. Way nicer than solar panels, which take up a lot of space.
Tade0
13 hours ago
Let's also not forget about the haze of photochemical smog everywhere there are combustion vehicles.
Today I walked by someone dropping off people from his diesel VW Passat B6. You could smell that thing from afar and it bothers me that it's still considered roadworthy.
DANmode
11 hours ago
Diesel particles are heavy.
hk1337
14 hours ago
Do you see any of those things now?
testing22321
14 hours ago
Personally, no. My brother does. My sister does.
Hundreds of millions of people do, and their health would improve if they didn’t.
dvdkon
13 hours ago
I understand the complaint against coal power plants, but you're not saying that nuclear power plant or large dams cause health issues, right?
testing22321
an hour ago
Nukes don’t often cause health issues, but from time to time…
bad_haircut72
12 hours ago
large dams do have pretty big environmental effects
lazide
11 hours ago
None of them that impact people’s health.
dredmorbius
10 hours ago
Not even remotely true.
<https://en.wikipedia.org/wiki/1975_Banqiao_Dam_failure>
<https://en.wikipedia.org/wiki/Dam_failure#List_of_major_dam_...>
And that's just the direct impacts from failure. Long-term environmental costs are real, if indirect.
I write this somewhat reluctantly as hydro is carbon-neutral,* and affords one of the better energy-storage options, as pumped hydro. Even allowing that dam failures tend to occur under regimes with significant organisational issues (low trust, low public concern, low levels of organisation, conflicted interests), dams have a pretty horrific track record for direct fatalities. Almost all those risks are mitigatable, and the underlying root cause (organisational dysfunction) would likely create similar risk patterns for other energy modalities. But we have a direct history to point to.
I've written on this topic a few times at HN should you or others be interested, I do hope my thoughts come across as nuanced, as they in fact are:
<https://hn.algolia.com/?dateRange=all&page=0&prefix=false&qu...>
lazide
8 hours ago
‘Health’ is generally used to refer to things like pollution, etc. that cause long term chronic impacts.
Not individual sudden events which drown/murder massive numbers of people regardless of their general health status (except perhaps for their ability to run really fast and really far on no notice).
Those are referred to as ‘disasters’.
deadbabe
9 hours ago
What if we designed nuclear cooling towers to be more aesthetic? Maybe it would become desirable to see.
lazide
11 hours ago
I’m not aware of any sizable cities with coal smoke stacks, nuke towers, or visible large dams.
Are you?
testing22321
7 hours ago
Indeed. Both my brother and sister live in cities with those, and I’ve driving through literally hundreds on my way around the world
lazide
7 hours ago
Examples/cite?
I haven’t seen an active smokestack with actual smoke in a city in decades, dams are where mountains are - and usually require the opposite terrain for a city, and no one builds nuke plants in major cities. That would be silly.
awesomecomment
9 hours ago
I personally don't know but I feel like, we also need to think of the environmental changes of something like solar batteries if we store the energy
There was a michael moore's documentary regarding climate change and I personally think that the best solution climate-wise speaking is probably nuclear but the whole world's sentiment is so regulated by lobby-ists which is why the cost of production of them and regulations shot up to an unreasonable amounts but the world was already transitioning to nuclear energies.
There are some new modular approaches to it which aren't as efficient but feel safer to the general public but nuclear is one of the most safest and compact sources of massive amounts of energy generation compared to solar and wind.
Nuclear Energy is cool.
Now am I right/wrong in saying this, let me know, I think I am right but I maybe wrong too, but its just that every expert I have seen on this topic really prefer's nuclear and my own "research" on this topic makes me feel the same really.
Somebody should write more clearly as to why nuclear is superior to solar and the others as a comment as I feel like I have written similar things atleast once more and maybe if there could be a nice website like why.nuclear or why-nuclear.net etc. which could give points of why nuclear is a superior form, it could be really great and I would love to hear more arguments both good and bad comparison with nuclear (primarily) and maybe comparing it with solar if somebody's an expert on this topic as I would love to hear an expert about it as well.
csdreamer7
14 hours ago
> It's also much nicer for the vehicles parked there to be in the shade.
Pedestrians too.
hinkley
11 hours ago
I love the idea but execution will determine if this is better for pedestrians. Poorly executed parking solar could reduce sightlines and escape routes by crowding ground level.
Hopefully this will be the sort of thing where we try different strategies quickly and pick winners and losers.
India has done a lot of work with covering irrigation canals with solar, and in some ways that’s a simpler problem so it makes sense that this is happening now instead of earlier. Big successful systems start as small successful ones. Maybe there is some substantial knowledge transfer that can occur there.
Arrath
2 hours ago
>Poorly executed parking solar could reduce sightlines and escape routes by crowding ground level
There's certainly no need for the support superstructure to need more pillars and members than your typical multi deck parking structure and while yes some have bad sightlines a majority are totally fine.
Scoundreller
10 hours ago
Depends on the season!
In winter I'd park my car at a train station and be sure to have the windshield pointed west so the car would be a bit toasty when I got in.
Reason077
12 hours ago
> ”the problem with carpark solar is the mounting solutions are low volume niche products that cost way more than traditional ground mounts.“
Yes, but if you’re building shade canopies over the parking lot anyway (this is quite common in southern Europe, for example) the marginal cost to add solar to the design will be relatively small. And if the government is backing it, production volumes will rise so it’s no longer a niche product. Economies of scale.
hinkley
11 hours ago
Solar already has economies of scale. There are three types of projects called out in How Big Projects Get Done and what they all have in common is that what you do on day 25 is mostly refinement of what you were doing on day four. Those are roads, solar, and wind projects. The self similarity means you are more likely to hit your targets. Because you just go faster and faster as you figure out the choreography. And the known unknowns.
shermantanktop
13 hours ago
> solar panels are no less ugly than asphalt.
Matter of taste. But I find geometric rows of tilted rectangles much less noisy (visually) than a zillion random cars, or an acre of cracked asphalt.
Scoundreller
9 hours ago
No matter what, the canopy solar system will be more expensive than ground mounting. You have to build for more wind loading. For a car to crash into it and not fall over. And now that the public is around, build that much stronger to never fall over. And secure the wiring that much better against the public.
Better to replace some farmland, which you can make a strong argument for if you're growing crops for biodiesel or fuel-ethanol were the sun-to-wheel efficiency is terrible.
> Parking lots are horrible. They're butt ugly heat islands that take up way too much space.
I've got bad news about nearly black PV panels... it might be cooler under them, but around them is a different story.
My personal thought is to saturate rooftops before going for the poorer ROI parking lot PV canopies.
tpm
6 minutes ago
> No matter what, the canopy solar system will be more expensive than ground mounting.
> Better to replace some farmland
South Korea is very hilly, farmland is too precious to replace with PV and I don't think they have been growing biofuel crops there.
wakawaka28
9 hours ago
>Better to replace some farmland, which you can make a strong argument for if you're growing crops for biodiesel or fuel-ethanol were the sun-to-wheel efficiency is terrible.
Yeah, who needs to eat anyway? Lol it is perfectly fine to put this shit in parking lots. In hot climates, it's a benefit to customers to have covered parking. The wiring should be no more fragile than, say, power lines or lighting fixtures in the area. Parking lots are also better because it doesn't matter as much if water leaks between or around the solar panels. Putting them on rooftops tends to cause roof leaks and it presents problems for roof repairs.
>I've got bad news about nearly black PV panels... it might be cooler under them, but around them is a different story.
Higher temps around black PVs should be similar to black asphalt. Also, the thermal mass of the PVs is lower, so they will not stay as hot in the evening.
There are probably issues with PVs related to ice buildup and hail. They probably don't make sense in places with those issues.
Dylan16807
4 hours ago
> biodiesel or fuel-ethanol
> who needs to eat
You, uh, don't eat those.
hinkley
12 hours ago
Some stores build parking for peak traffic days and a few people have suggested that it would be better if the outer bits of your lot were built using permeable pavement to reduce the amount of runoff that has to go onto the storm sewers. The little rain gardens we see now do something but not much.
cyberax
8 hours ago
> Parking lots are horrible. They're butt ugly heat islands that take up way too much space.
Wait until you hear about public transit...
> Generally the problem with carpark solar is the mounting solutions are low volume niche products that cost way more than traditional ground mounts.
Not really. You don't need anything unusual, just regular flat panels. The main expense is building the canopy itself to conform to all the requirements for hurricane/seismic resistance.
jakelazaroff
2 hours ago
Subways and buses are vastly more efficient, both in terms of energy cost and rider throughput.
cyberax
an hour ago
Nope. A large city might have 1-2% of it's entire population just working on supporting transit. It's _that_ wasteful.
Transit also destroys entire lifetimes worth of time every day by forcing people to wait or to suffer through inefficient routes.
That's why parking lots are the most beautiful structures in cities.
Permik
28 minutes ago
You seem to forget that all the people on public transit essentially get their time back. It's so much more efficient than everyone having to use their own time to all individually make that effort.
I made some calculations like a year ago using public data from Finland in the year 2023, the people lost collectively 55k years to driving cars. If we could take all that time back by doing minimum wage work in Finland, that'd add 4,841,511,500.55€ to the GDP and add approximately 16,400,620,208.11€ of taxable income to the state.
Of course that's just an approximation which presumes everyone could do their jobs while commuting and that you could get 100% efficiency. (But many of the values in the data were rounded down, so this is technically just a lower bound on the value ROI)
apparent
11 hours ago
Will self-driving cars cut down on parking lots? Seems like they'll be much smaller/denser once the car can even just self park (don't have to leave room on left/right for opening doors, and can even stack tighter/front back as long as you're smart about shuffling them).
And of course, once more people are using self-driving cars instead of owning their own, cars will have less idle time spent in lots.