Next, all surfaces of buildings must have solar panels.
This hotel in India makes money from selling to the grid, in addition to their own electricity use: https://www.youtube.com/watch?v=V-AuPpqLO-o
South Korea Mandates Solar Panels for Public Parking Lots
121–130 of 229 posts
Re: South Korea Mandates Solar Panels for Public Parking Lots
#122Earlier quoted context omitted.
There's a lot of entirely unsupported statements here that seem to be nothing more than uneducated opinion. You assume there's still a lot of rooftop space that doesn't already have solar on it. SK has very high population density and long started moving toward "less efficient" installs like balcony solar because most 'easy' rooftops already have solar on them. Remember: the rest of the world is way ahead of the US o…
> You ignore that solar on-site coupled with EV chargers on site eliminates a lot of grid transmission losses. In theory a residential complex, employer, retail, or commercial site could set up something like this, pumping most of the energy into the cars parked underneath, and have a fairly small connection to the grid. How many square yards of panels would one EV charger need an a typical afternoon / evening?
A Solar panel produces about 250W peak per square meter. A parking spot can thus produce maybe three kW. A whole parking lot is probably enough for one or two chargers.
Re: South Korea Mandates Solar Panels for Public Parking Lots
#123Re: South Korea Mandates Solar Panels for Public Parking Lots
#124Earlier quoted context omitted.
> You ignore that solar on-site coupled with EV chargers on site eliminates a lot of grid transmission losses. In theory a residential complex, employer, retail, or commercial site could set up something like this, pumping most of the energy into the cars parked underneath, and have a fairly small connection to the grid. How many square yards of panels would one EV charger need an a typical afternoon / evening?
A Solar panel produces about 250W peak per square meter. A parking spot can thus produce maybe three kW. A whole parking lot is probably enough for one or two chargers.
People would be unhappy with a charger that only worked slowly and during the day, even if it was free.
Re: South Korea Mandates Solar Panels for Public Parking Lots
#125In Phoenix, Arizona, there are solar panels over the parking lots at since of the grocery stores. Makes a huge difference in survivability when you get back to the car. (Without huge infrastructure dedicated to car welfare, Phoenix is uninhabitable.)
Phoenix is uninhabitable precisely because it's entirely optimized for car life from what I heard? (i.e. massively spread out, no walkability, etc)
I suspect they were mostly referring to it being uninhabitable due to the extreme heat and duration of 100ºF+ days.
Re: South Korea Mandates Solar Panels for Public Parking Lots
#126Earlier quoted context omitted.
I’d love to not have a car, but I’ve lived in five us cities - one (nyc) had public transportation that was usable - the rest public transportation was massively less efficient than driving. Until that gets fixed people are driving…
massively less efficient is definitely the word, LA has some residents that swear by our trains, but do they go faster than the 1 hour 5 minute commute in traffic? Nope!
The speed of traffic will always be equal to the speed of public transit. To reduce traffic jams you speed up transit. I do not remember what this always-observed effect is named.
Re: South Korea Mandates Solar Panels for Public Parking Lots
#127Earlier quoted context omitted.
Top of my head thought: Depends on the colour of the cars and pavement. A PV will send ~20% of the light energy hitting it down the wire, the rest = heat. PVs don’t really reflect back much light for obvious reasons. The increased surface area might help it radiate more heat at night on a clear day, unless the panels are flat and then it’s no change really.
Is that 20% of the solar energy, or 20% of the visible light, or some other spectrum fraction? It's easy to lose track of what part of the spectrum you're discussing.
> The conversion efficiency of a photovoltaic (PV) cell, or solar cell, is the percentage of the solar energy shining on a PV device that is converted into usable electricity
https://www.energy.gov/cmei/systems/solar-performance-and-ef...
Re: South Korea Mandates Solar Panels for Public Parking Lots
#128I'd probably be okay with a law that mandated parking lots have almost anything on top, whether parks, panels, buildings, or agriculture.
Re: South Korea Mandates Solar Panels for Public Parking Lots
#129The solar covered parking lots near me are great because they also serve as cover for your car when it’s hot and sunny. It’s not the most cost effective way to install solar, though. A tall structure designed to put the panels high up in the air and leave a lot of space for cars is a lot more expensive than normal rooftop solar or even field setups. This is basically a way to force some of the cost of clean energy as…
A better version for shade and city beautification is to force trees around/within the parking lot.
That's not possible in most of the parking lots of South Korea. It's extremely dense and no space for big enough trees to shade cars.
Re: South Korea Mandates Solar Panels for Public Parking Lots
#130In Phoenix, Arizona, there are solar panels over the parking lots at since of the grocery stores. Makes a huge difference in survivability when you get back to the car. (Without huge infrastructure dedicated to car welfare, Phoenix is uninhabitable.)
Phoenix is uninhabitable precisely because it's entirely optimized for car life from what I heard? (i.e. massively spread out, no walkability, etc)
It's car optimized because the 110F weather makes it un-walkable in the first place. When I lived in a walkable city, I would prefer to walk 30 minutes than drive. When I lived in Phoenix, I did not want to spend more than 30 seconds outside in the summer.