Live data from Hacker News

New Record Low Solar Price in Abu Dhabi – Costs Plunging Faster Than Expected

rameznaam.com

21–30 of 95 posts

Re: New Record Low Solar Price in Abu Dhabi – Costs Plunging Faster Than Expected

#21
post #3

This whole machination thing will collapse as soon as the solar panel prices, along with the inverter and battery costs drop low enough to be part of every house. Once everyone generates and stores their own electricity, the residential market will go away. This might be another 20 to 30 years off, but it is inevitable. And once factories start building Stirling engines and solar facilities into their designs, the in…

More and more people live in dense cities where they only rent a small place in a large building. Such places make solar irrelevant. For metropolitan spaces you need power plants anyway.

Re: New Record Low Solar Price in Abu Dhabi – Costs Plunging Faster Than Expected

#22
post #3

This whole machination thing will collapse as soon as the solar panel prices, along with the inverter and battery costs drop low enough to be part of every house. Once everyone generates and stores their own electricity, the residential market will go away. This might be another 20 to 30 years off, but it is inevitable. And once factories start building Stirling engines and solar facilities into their designs, the in…

Only for people that own their house; renters won't be able to take advantage of this because it's a lot of capital outlay that the home owner gets no benefit from. Same for anyone in an apartment. So the residential market for purchased electricity will never go away, but a significant reduction would still be a huge win.

If rooftop solar is profitable it doesn't matter too much who owns the house. The owner still could sell the electricity to the renters.

Re: New Record Low Solar Price in Abu Dhabi – Costs Plunging Faster Than Expected

#23
post #18

Earlier quoted context omitted.

Renters can buy solar from those producing it via virtual net metering or community solar garden projects. Doesn't have to be on your own roof to opt in.

Plus if you offer me a place where I don't have to pay an electricity bill, I'm able to contribute that money towards a higher rent than otherwise.

I dont know where you live but in 3 different countries where i have lived till now the electricity bill was never high enough for me to take it in account for the choice of a place.

Re: New Record Low Solar Price in Abu Dhabi – Costs Plunging Faster Than Expected

#24

This will create massive pressure on the price of oil. Why would anyone in their right mind not try to sell it off as fast as possible as it won't be worth much in a few years.

Solar doesn't really compete with oil. It competes with coal, natural gas, and nuclear power to power homes.

What happens when transportation starts to shift over to electricity?

Re: New Record Low Solar Price in Abu Dhabi – Costs Plunging Faster Than Expected

#25
May be a noob question, but if we can lay down cables for internet across the ocean floor connecting the entire world, why not lay down cables to connect all electricity grids. Half the earth always faces the sun. We shouldn't need batteries at all then, right? And we always have the traditional power stations (renewable and non-renewable) to augment the load. (At least in theory?)

Re: New Record Low Solar Price in Abu Dhabi – Costs Plunging Faster Than Expected

#26

May be a noob question, but if we can lay down cables for internet across the ocean floor connecting the entire world, why not lay down cables to connect all electricity grids. Half the earth always faces the sun. We shouldn't need batteries at all then, right? And we always have the traditional power stations (renewable and non-renewable) to augment the load. (At least in theory?)

There are technical and economic challenges.

To get started, read https://en.wikipedia.org/wiki/Submarine_power_cable

Re: New Record Low Solar Price in Abu Dhabi – Costs Plunging Faster Than Expected

#27

May be a noob question, but if we can lay down cables for internet across the ocean floor connecting the entire world, why not lay down cables to connect all electricity grids. Half the earth always faces the sun. We shouldn't need batteries at all then, right? And we always have the traditional power stations (renewable and non-renewable) to augment the load. (At least in theory?)

There are technical and economic challenges. To get started, read https://en.wikipedia.org/wiki/Submarine_power_cable

Slightly off-topic, but I stumbled across this fascinating documentary about the massive challenges of laying the first submarine transatlantic cable (1858) a few days ago:

https://www.youtube.com/watch?v=z_ErFUv8HYs

Re: New Record Low Solar Price in Abu Dhabi – Costs Plunging Faster Than Expected

#28

May be a noob question, but if we can lay down cables for internet across the ocean floor connecting the entire world, why not lay down cables to connect all electricity grids. Half the earth always faces the sun. We shouldn't need batteries at all then, right? And we always have the traditional power stations (renewable and non-renewable) to augment the load. (At least in theory?)

It's a very good question. I always thought that it's because of technical difficulties when transmitting electricity over long distances, but it turns out we already do it well (HVDC). When you think about it on a continent scale: why not move all PV panels from Germany to sunnier regions of Europe like Spain or Portugal where you can generate twice more power with them (in average 200 W/m² instead of 100 W/m²). The answer is simple: we'd need to have a common grid across EU member countries, but such a thing doesn't exist and it's unlikely to happen anytime soon. It turns out the biggest issue on this planet is always politics.

Re: New Record Low Solar Price in Abu Dhabi – Costs Plunging Faster Than Expected

#29

May be a noob question, but if we can lay down cables for internet across the ocean floor connecting the entire world, why not lay down cables to connect all electricity grids. Half the earth always faces the sun. We shouldn't need batteries at all then, right? And we always have the traditional power stations (renewable and non-renewable) to augment the load. (At least in theory?)

Power transmission on large distances is a very difficult subject. To put it simply, wires have a non-zero resistance to current, increasing with its length.

For instance, Morocco plans to put solar panels in the Sahara. The solution that is considered in order to transmit power was that the solar station would charge batteries and the batteries would be carried by trucks.

Re: New Record Low Solar Price in Abu Dhabi – Costs Plunging Faster Than Expected

#30

May be a noob question, but if we can lay down cables for internet across the ocean floor connecting the entire world, why not lay down cables to connect all electricity grids. Half the earth always faces the sun. We shouldn't need batteries at all then, right? And we always have the traditional power stations (renewable and non-renewable) to augment the load. (At least in theory?)

Because power losses will be absurd (unless you manage to find a room-temperature superconductor)

Pretty simple math, if you cable has 1 Ohm/km then the distance between the Northeastern most point in Canada to Ireland is around 3000 km (or 3x10E6m)

So suppose you have this very long extension cord, plug it on Canada (100V there to help the math) and plug a lamp on Ireland (an old incandescent 100W bulb, because it dims)

Your lamp is going to have 100 Ohms. Current is going to be 100V/(6100 ohms) = 16mA, making your lamp glow with 1.6W

Post reply on HN