Become a fan of Slashdot on Facebook

 



Forgot your password?
typodupeerror
×
Earth

Can Solar Power Compete With Coal? In India, It's Gaining Ground (wsj.com) 93

Electricity from sunlight costs less, a hopeful sign for developing nations building out their power grids. From a report: In a dusty northwest India desert dotted with cows and the occasional camel, a solar-power plant is producing some of the world's cheapest energy. Built in 2018 by India's Acme Solar Holdings, it can generate 200 megawatts of electricity, enough to power all the homes in a middle-size U.S. town. Acme sells the electricity to distributors for 2.44 rupees (3.4 cents) a kilowatt-hour, a record low for solar power in India, a country that data trackers say has the world's cheapest solar energy. More remarkable, the power costs less to generate in India than the cheapest competing fossil fuel -- coal -- even with subsidies removed and the cost of construction and financing figured in, according to the Indian government and industry trackers. Price-conscious Indian utilities are eager to snap up that power. "We are infamous for low cost," says Sandeep Kashyap, Acme's president.

Solar power has entered a new global era. The industry was long dependent on subsidies and regulatory promotions. Now, technological innovation and falling solar-panel prices have made solar power inexpensive enough to compete on its own with other fuel sources in some regions [Editor's note: the link may be paywalled.], when it comes to newly built plants. That could turbocharge growth of renewables in the global energy industry, especially in fast-growing Asian markets where much of the world's energy infrastructure expansion will take place. Governments in many solar markets -- including China, the biggest -- are phasing out or reducing supports. Solar-plant development is going mainstream, with finance provided by global investors like Goldman Sachs Group, Singaporean sovereign-wealth fund GIC and huge Western pension and private-equity funds.

This discussion has been archived. No new comments can be posted.

Can Solar Power Compete With Coal? In India, It's Gaining Ground

Comments Filter:
  • Let me guess, the solar plant has a secondary function as a death ray?

  • by Anonymous Coward

    ... Super Genius!

    Sure... the plang works just fine until anvils start raining on it.

    As for Solar vs. Coal. For all the 'extras' in creating solar panels - I'll take them over coal any day.

    There is no free lunch - we just need to make sure that the lunch we do buy is as environmentally friendly and economically viable as possible.

  • by retroworks ( 652802 ) on Tuesday February 18, 2020 @05:04PM (#59740624) Homepage Journal

    China mass produced them, putting USA energy efficient bulb manufacturers out of business, and everyone complained for 10 years about it. In the meantime the cost of energy efficient bulbs (and LEDs) dropped massively due to the scale of production, and they were adopted by emerging cities, and it was basically much better than if Americans had produced them in smaller numbers at higher costs. That is what the article says is happening to the cost of new solar panels.

    WSJ is one of the best researched journalism sources on the planet (though this article swings a bit between euphoria and impossibility of energy storage). But the paper's "comment trolls" are rabid, anything which is pro-solar gets savaged.

    • by necro81 ( 917438 ) on Tuesday February 18, 2020 @05:53PM (#59740822) Journal

      WSJ is one of the best researched journalism sources on the planet (though this article swings a bit between euphoria and impossibility of energy storage). But the paper's "comment trolls" are rabid, anything which is pro-solar gets savaged.

      I particularly grow tired of the strawman "well, solar can't supply 100% of all use cases at all times, therefore it is total crap and can never be of any use to anyone, anywhere!"

    • by AmiMoJo ( 196126 )

      Philips still makes LED bulbs. They mostly go for the high end of the market, particularly smart bulbs.

      Japanese manufacturers still make them too on the same basis. Panasonic, Mitsubishi etc.

      There's always a race to the bottom and it's best not to be in it.

    • OH NO, not all the light bulb jobs! What ever will we do! ;)
  • From the link (Score:2, Informative)

    by binkless ( 131541 )

    "Solar’s big problem: It generates power only when the sun shines. Wind power, similarly, works only with wind. So displacing fossil fuels could require cheaper ways to store energy. And the more renewables in the power-transmission grid, the more the grid will need to be rebuilt to accommodate those special characteristics.

    That inefficiency is why the IEA forecasts the amount of power solar generates to rise to only 11% of the world’s total by 2040, around half that of coal or natural gas."

    • There are options that allow us to bank the sun's energy so it can be used when the sun isn't shining on the focus. For instance, concentrated solar arrays that use molten salt to store the heat energy of the sun can be used to drive steam turbines around the clock. If you build these sites in coordination with LTFR plants, they can both generate molten salt to drive steam turbines and create safe and relatively inexpensive power at any time of day.
    • by Shotgun ( 30919 )

      There are other design other than a field of solar cells.

    • That's how far you can efficiently transport solar power, or wind power, East-West, or North-South, using high-voltage DC power transmission lines.
      It's always windy somewhere on (or off the shores of) your continent. It's probably sunny somewhere in a 2385km radius from you for a good half of the 24 hour day.
    • In a country like India, Air conditioning is a massive load during the day which falls during the night so India needs a lot more power during the day where Solar power fits in beautifully. Noone is talking about going to a zero carbon economy. India creates way less carbon per capita than any Western country so all India has to do is hold onto the current carbon per capita number while increasing energy usage to improve living standards while western countries can reduce their energy usage to come down to

      • Also from the linked article:
        "In India, which has some of the world’s best conditions for generating solar power, the mismatch is pronounced because demand for electricity swells after people go home and switch on air conditioners in the evening, when solar plants aren’t working."

        • by ghoul ( 157158 )

          I call bullshit on that. People use way more airconditioning during the day when temperatures are higher than in the evening unless the author is stupid enough to think people who can afford air conditioning at home would ever work in offices without airconditioning

    • The land in question is India.

      Sporadic power is better than no power.

      We all know that the sun does not shine at night, why you bore us with such arguments is beyond me ...

    • That WAS the problem, but energy storage got cheap enough now that's not really the problem. The problem now is people just being dumb and not enough lithium ion factories/solar/wind for everyone to immediately upgrade. We are building tons of solar though, we've gotten fairy good at that so the cost isn't a problem and continues to go down. Wind is a good choice too, but really only works here and there, but when it does it's awesome. Like sky hydro without all the marine life issues since the sky is reall
  • Duh? (Score:4, Interesting)

    by Solandri ( 704621 ) on Tuesday February 18, 2020 @05:29PM (#59740728)
    India sits a lot closer to the equator, so the sunshine is stronger (less oblique angle through the atmosphere, so less atmospheric absorption) and more consistent (less variance between summer and winter). If you look at their solar power stats [wikipedia.org]
    • India had 21.651 GW of capacity in 2018, 28.181 GW in 2019, for a 2018-2019 average of 24.916 GW
    • This works out to nominal annual production of (24916 GW)*(8766 hours/yr) = 218414 GWh per year
    • Their actual production for 2018-2019 was 39268 GWh
    • This works out to a capacity factor of (39268 GWh) / (218414 GWh) = 0.1798. That is, a solar panel in India on average generates 17.98% of its rated capacity.

    Compare to, say, Germany [wikipedia.org], which has an average of a 10%-11% capacity factor. In other words, the exact same solar panel will generate about (17.98 / 10.5) = 71% more electricity in India than in Germany. (And if you're curious, the continental U.S. has about a 0.145 average capacity factor for solar; though the desert Southwest can exceed 0.18.)

    • Re: (Score:2, Troll)

      by necro81 ( 917438 )
      and let us all not forget: Germany gets more sun than the U.S. [youtube.com] It's true because Fox News said so!
    • by Ogive17 ( 691899 )
      We have friends that run a small hotel/restaurant outside Bremen, Germany (which is in Northern Germany). They installed solar panels which offset about $5k in costs per year (and is convenient to charge their 2 Tesla vehicles).

      It's not going to be as beneficial this time of year but the amount of light they get in the summer was surprising to even me during our visit last July. I'm not advocating solar farms in Northern Germany but widespread residential adoption would significantly reduce the need for
      • The winter in Germany was/is very sunny at the moment.
        We had five or six storms in the last six weeks, but they mostly only brought wind and no clouds or rain.

        Climate change, you might have heard about it. On the other hand, winters never were really particular cloudy in Germany. When it used to be really cold, we had clear sunny skies.

    • Solar panels aren't so expensive than you need MAX sunlight, you just install more panels. What matter is scale and cost, not efficiency of the panels so much.
  • A full-scale system based on a mix of solar wind and microhydro can easily achieve 99.99 percent uptime, and the addition of other forms of energy storage such as pumped water up an incline, pulley storage (rocks), and flywheels can meet needs that batteries might otherwise fill.

    Coal is more expensive than all of these.

    Fossil fuels are over.

    A combination of industrial and commercial solar and wind with residential solar wind and microhydro for decentralized grids are really all you need.

  • It's solar power pulling into the lead!
    But wait! Coal just spewed a big grey cloud in front of solar's collectors. And now they are in the lead again.

  • but as soon as you have to pay for the dirty air, the health problems from it, and the run off from the mines plus treating miners well (e.g. no black lung, and healthcare when they hit 50-55 and can't work anymore, mining kills ya) then heck yeah! It doesn't compete, without cost externalization it blows coal out of the water. Which you can now drink because it's not polluted with coal mine run off.
  • Solar is as cheap or cheaper than natural gas in many places and will soon be cheaper in most places. There are some places that have poor renewable potential. Now that energy storage is cheap enough you will see a more rapid decline of fossil fuels, though it have to ramp up to speed over 10-20 years just like Shale Gas and Oil ramped up for about 10-20 years and then coal plants started dropping like flies. Except now you don't need shale you just need solar/wind/other renewable and lithium ion storage w
  • So... they're fucked!

    Those are the literal corporate equivalents of a serial murderer and torturer, and several pimps.

  • Gaining ground. I see what you did there. Nice one.

Arithmetic is being able to count up to twenty without taking off your shoes. -- Mickey Mouse

Working...