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Depends. Are there lots of tall buildings around the parking lot? Solar panels are made of a lot of rare metals and so we have to be very selective about where we install them to maximize energy output. For this region large open spaces near the equator work well. Not that they can't work elsewhere, or couldn't work over a parking lot, but there's a lot of variables that have to be considered on each individual level.
Solar panels are made of a lot of rare metals
Rare Earth Metals aren't actually that rare, although they do tend to be concentrated in countries outside our traditional western sphere of influence. We're seeing a lot of political wrangling in South America and Central Africa, precisely because countries like Bolivia and the Democratic Republic of Congo have an outsized stock of these minerals. In fact, a big part of the conflict in Rwanda along their border with the Congo stems from illegal mining and black market export of minerals, and the subsequent criminal cartelization that's sprung up around this traffic.
there’s a lot of variables that have to be considered on each individual level
If you're talking about a globally coordinated geo-engineering project to maximize solar electricity production, then yes - building a big band of solar plants inside the Tropics zone would yield the biggest band for buck. But then moving that electricity out again becomes a challenge, particularly if you're trying to get it to mega-cities like NYC or Tokyo or London or Beijing.
If you're just trying to generate local green power in Ohio, without running massive HVDC lines all the way down to the Yucatan Peninsula, then covering the Browns Stadium or the JACK Cleveland Casino in solar panels is as good a use of solar infrastructure as anything.
Yeah like it's not always a bad thing to commit resources with less than perfect efficiency. Having renewable energy is better than having none every time.
It's not so much that they're rare as there is a known limited supply of them, and the means of harvesting them currently creates a lot of pollution. Fossil fuels are obviously worse in this regard. And even nuclear has a limited supply in terms of naturally available fuel sources.
Renewable energy should be operated in the manner that best protects the environment, and we should be trying to waste as little possible in operating it. For those reasons, I think efficiency and sunlight hours are important considerations. The fossil fuel industry is extremely wasteful and destructive. The renewable industry should be the opposite of that.
Small solar installations of a few panels, sure like they don't need perfect efficiency. But if we're committing hundreds or even thousands of panels to an installation? We should maximize efficiency.
It’s not so much that they’re rare as there is a known limited supply of them and the means of harvesting them currently creates a lot of pollution.
And this is where we get into the real economic problem of any industrial scale energy project. FFS, its not like labor abuses and property mismanagement were foreign to the coal or O&G industries. But when people talk about a Green New Deal, a bit part of the project is about building social infrastructure alongside energy infrastructure, such that you're not ending up with a bunch of strip mines and company towns doing what Standard Oil/Exxon and Peabody Energy were doing 50 years ago.
The fact that these rare earth metals are in countries with large native populations that westerners are dismissive of / openly hostile to doesn't help things either. How many American petrochemical CEOs would love to revisit King Leopold II's run through the Congo, if it meant profits on par with what Saudi ARAMCO generate?
Renewable energy should be operated in the manner that best protects the environment, and we should be trying to waste as little possible in operating it.
That would require a degree of political economy afforded to the folks living in and around the areas of resource extraction and labor exploitation. And that's where I think we run into real problems.
Even as we speak, the state of Georgia is gearing up for some serious labor conflicts around their EV battery plants. Labor groups are attempting to unionize the battery giga-factories being built there, while Atlanta's Cop City is being constructed to crack down on it. And that's in the relatively peaceful and post-industrial Atlantic Seaboard. Bolivia's on its second failed coup attempt in less than four years.
I could very easily see us doing an Iraq-style intervention into one of these big cobalt/lithium exporting countries, on the grounds that they're being oppressed by an evil government state nationalization program. Ask Gamal Abdel Nasser or Salvadore Allende what happens after that.
Solar panels don't use any "rare metals." Solar carport projects simply cost 3-4x more on a per watt basis than large "green field" ground mount projects. This is due to the increased structural, permitting, and install costs. Carports also cannot track the sun, which reduces their output by about 20%.
Nah, just give like Walmart and Target and other stores that have large parking lots a tax break or something.
FUCK THAT. Levvy additional taxes on any Corp that doesn't utilize their solar potential while subsidizing the cost of the panels.