Ever Heard “Solar Panels Are Too Unreliable”?

by Climate Reality, climaterealityproject.orgNovember 4 11:11 AM

Despite the tremendous source of energy shining in the sky, some keep debating the merits of solar power and other renewable energies, asking the same questions over and over again: How effective is solar energy? Is it more expensive? Where and how does solar fit in the larger energy grid?

Many of the arguments against solar are based on outdated or incorrect information. That’s why we’re setting the record straight on some of the most common solar energy myths. First up: solar energy and reliability.

Myth: "Solar Panels Are Too Unreliable."

Fact: Most solar panels produce electricity for over 20 years or more.

If you’ve heard solar panels are unreliable, you’re getting outdated information. In fact, the truth is the exact opposite. Most solar panels produce electricity for over 20 years or more as their parts do not wear out easily. In fact, many of the first solar systems installed over 40 years ago are still active today.

Additionally, using solar power diversifies our energy sources, making the entire grid more dependable. We have more tools available to make solar and other variable renewable technologies more reliable than ever, such as larger and more integrated grids, better resource forecasting, and more use of energy storage technologies. What will need to be replaced in the next 30 years are aging fossil fuel infrastructures like outdated coal-fired power plants.

Over a million! Retweet if you think every home can be solar home https://t.co/GpG0dSmzzF #PutSolarOnIt pic.twitter.com/z3YzEMYb38

— Climate Reality (@ClimateReality) November 4, 2015

If we make the switch and rely on renewable sources of energy like the sun, we can save billions of dollars by avoiding not only the costs of replacing these plants, but also the increasingly higher costs of climate change in areas like healthcare expenses and damage from extreme weather.

The future of solar is bright! Join Climate Reality to demand a clean energy future: http://bit.ly/1WpKIld

Posted by on Saturday, September 12, 2015

Scientists estimate that more than enough solar energy strikes the earth every hour to power our whole society for an entire year.

So next time you hear that solar panels aren’t reliable – just let them know that as long as the sun will rise, solar panels will generate clean, renewable energy.

Want to Bust More Solar Myths?

"It doesn’t work when it’s cloudy." "But it’s too expensive. "We can use clean coal instead."

If you’ve had it with these excuses, download our free Solar Myths Ebook now to learn how solar energy can not only meet our energy needs, but can even help solve climate. More

 

©

New Energy Outlook 2015

EXECUTIVE SUMMARY

By 2040, the world's power-generating capacity mix will have transformed: from today's system composed of two-thirds fossil fuels to one with 56% from zero-emission energy sources. Renewables will command just under 60% of the 9,786GW of new generating capacity installed over the next 25 years, and two-thirds of the $12.2 trillion of investment. • Economics – rather than policy – will increasingly drive the uptake of renewable technologies. All-in project costs for wind will come down by an average of 32% and solar 48% by 2040 due to steep experience curves and improved financing. Wind is already the cheapest form of new power generation capacity in Europe, Australia and Brazil and by 2026 it will be the least-cost option almost universally, with utility-scale PV likely to take that mantle by 2030.

• Over 54% of power capacity in OECD countries will be renewable energy capacity in 2040 – from a third in 2014. Developed countries are rapidly shifting from traditional centralised systems to more flexible and decentralised ones that are significantly less carbon-intensive. With about 882GW added over the next 25 years, small-scale PV will dominate both additions and installed capacity in the OECD, shifting the focus of the value chain to consumers and offering new opportunities for market share.

• In contrast, developing non-OECD countries will build 287GW a year to satisfy demand spurred by economic growth and rising electrification. This will require around $370bn of investment a year, or 80% of investment in power capacity worldwide. In total, developing countries will build nearly three times as much new capacity as developed nations, at 7,460GW – of which around half will be renewables. Coal and utility-scale PV will be neck and neck for additions as power-hungry countries use their low-cost domestic fossil-fuel reserves in the absence of strict pollution regulations.

• Solar will boom worldwide, accounting for 35% (3,429GW) of capacity additions and nearly a third ($3.7 trillion) of global investment, split evenly between small- and utility-scale installations: large-scale plants will increasingly out-compete wind, gas and coal in sunny locations, with a sustained boom post 2020 in developing countries, making it the number one sector in terms of capacity additions over the next 25 years.

• The real solar revolution will be on rooftops, driven by high residential and commercial power prices, and the availability of residential storage in some countries. Small-scale rooftop installations will reach socket parity in all major economies and provide a cheap substitute for diesel generation for those living outside the existing grid network in developing countries. By 2040, just under 13% of global generating capacity will be small-scale PV, though in some countries this share will be significantly higher.

• In industrialised economies, the link between economic growth and electricity consumption appears to be weakening. Power use fell with the financial crisis but has not bounced back strongly in the OECD as a whole, even as economic growth returned. This trend reflects an ongoing shift to services, consumers responding to high energy prices and improvements in energy efficiency. In OECD countries, power demand will be lower in 2040 than in 2014.

• The penetration of renewables will double to 46% of world electricity output by 2040 with variable renewable technologies such as wind and solar accounting for 30% of generation – up from 5% in 2014. As this penetration rises, countries will need to add flexible capacity that can help meet peak demand, as well as ramp up when solar comes off-line in the evening. More

 

 

©

Micropower’s Quiet Takeover

In a cover story and article 14 years ago about the emergent disruption of utilities, The Economist’s Vijay Vaitheeswaran coined the umbrella term “micropower” to mean sources of electricity that are relatively small, modular, mass-producible, quick-to-deploy, and hence rapidly scalable—the opposite of cathedral-like power plants that cost billions of dollars and take about a decade to license and build.

His term combined two kinds of micropower: renewables other than big hydroelectric dams, and cogeneration of electricity together with useful heat in factories or buildings (also known as combined-heat-and-power, or CHP).

Besides being cost-competitive and rapidly scalable, why does micropower matter? First, as explained below, its operation releases little or no carbon^.[1] Second, micropower enables individuals, communities, building owners, and factory operators to generate electricity, displacing dependence on centralized, inefficient, dirty generators. This democratizes energy choices, promotes competition, speeds learning and innovation, and can further accelerate deployment—because “vernacular” technologies accessible to many diverse market actors, even if individually small, tend to deploy faster in sum than a few big units requiring specialized institutions, complex approvals, intricate logistics, and hence long lead times.

Thanks to Bloomberg New Energy Finance, which tracks investments and generating capacity, and the global expert network REN21.net, which tracks capacity and (where known) electrical output, global progress in renewables has become rather transparent. Starting in 2005 and updated with a fifth edition in July 2014, RMI’s Micropower Database added a third source: industry sales data for cogeneration equipment. Tracking renewables, minus big hydro, plus cogeneration, this database documents the global progress of distributed, rapidly scalable, and (as we’ll see) no- or low-carbon generators.

The update’s most astonishing finding: micropower now produces about one-fourth of the world’s total electricity (Fig. 1).

MICROPOWER’S CLIMATE IMPLICATIONS

Operating modern renewables is essentially carbon-free, except for minor subsets fueled by biomass grown using unsustainable practices that gradually deplete soil carbon.[2] Of the estimated 3–5 percent of cogeneration fueled by biomass, most is in the forest products industry, whose biomass wastes produce most of its electricity and process heat.

Cogeneration in refineries often burns waste fuels that would otherwise be uselessly flared. Similarly, much industrial cogeneration harnesses waste heat previously thrown away. Where extra fuel is burned to make electricity as well as heat, typically far less is burned than when making them separately. If cogeneration also produces cooling and other services, it can convert as much as 93 percent of fuel energy into useful work, both in industry and in buildings. Moreover, the natural gas that fuels most cogeneration is only about half as carbon-intensive as the coal-fired power-only generation it often displaces.[3]

Big hydroelectric dams and nuclear power are also carbon-free in operation. Thus in 2013, nearly half of the world’s electricity was produced with little or no carbon release: 8.4 percent by modern renewables [4], 10.2 percent by nuclear power (set to be overtaken by modern renewables in 2015), 15.5 percent by cogeneration [5], and 13.5 percent by big hydroelectric dams (excluding the 2.8 percent small hydro classified under modern renewables).

The other half came from power-only plants, burning mainly coal. Those plants cost more to build, and often more just to run, than their competitors, so their orders are fading, their operations are dwindling, and over decades, they’ll retire in favor of cleaner, cheaper substitutes—both micropower and efficient use.

WINNERS AND LOSERS

Far from recognizing that they’re being rapidly overtaken, many advocates of coal or nuclear power stations don’t even acknowledge micropower as an important competitor—even as it grabs their markets and destroys their sales. In 2009, a senior strategic planner for a major nuclear vendor told me micropower was trivial—having failed to find it in official databases of utility-owned central power stations, without understanding the difference. And even at minor market share, micropower can have major effects. The solar 4.7 percent of Germany’s 2013 generation destroyed the incumbent utilities’ business model and wiped a half-trillion Euros off their market cap. More

 

© 2014

Solar energy: a sunflower solution to electricity shortage

Computer giant IBM last week revealed the prototype of its advanced solar electricity generators: a 30ft-high concrete “sunflower” fitted with wafer-thin aluminium mirrors and a maze of tiny tubes for carrying coolant through the heart of each device.

The machines, which will be built in conjunction with the Swiss company Airlight Energy, can convert 80% of the sun’s radiation into electricity and hot water, it is claimed, with each generating 12 kilowatts of electricity and 20kW of heat on a sunny day, enough to supply several homes.

At the device’s official unveiling in Zurich, executives for both companies said they hoped that by 2017, when their sunflower generators should be ready for the market, they could be manufactured for half to one-third of the cost of comparable solar converters today. According to IBM, the machine’s secret lies with the microscopic tubes that carry water through the cluster of photovoltaic chips at the heart of each device. This system has already been adopted by IBM to cool its high-performance supercomputers. “We were inspired by the branched blood supply of the human body,” said Bruno Michel, from the IBM Research laboratories in Zurich.

The sunflower operates by tracking the sun so that it always points in the best direction for collecting its rays; these are then focused on to a cluster of photovoltaic cells that are mounted on a raised platform. The cells convert solar radiation into electricity. However, without the microchannel cooling system, which carries distilled water through the chips, temperatures would reach more than 1,000C. With the microcooling system, which carries water to within a few millimetres of the back of each chip, temperatures are kept down to 90C – a far safer, and far more efficient, operating level. Electricity is generated while the system also produces large amounts of hot water from the cooling system. “That hot water is a game changer,” added Michel. “Electricity is obviously vitally useful but so is the heat – for we can use it for desalinating water.”

At present, about 1.3 billion people have no access to electricity. However, that figure is dwarfed by the number – 2.5 billion – who have no access to proper sanitation. And according to figures supplied by Airlight Energy, that latter number is currently increasing at a rate of 9% a year. However, the IBM-Airlight sunflower is designed to tackle both problems. The electricity will have numerous uses while the hot water can be pumped through desalinators that use porous membranes to boil salt water and distil the result into pure, drinkable water. A large installation made up of several generators could provide enough fresh water for an entire town, it was claimed at last week’s launch.

Apart from sites in Africa, the Middle East and Australia, it is hoped the sunflower system will be used for remote hospitals, hotels and holiday resorts. IBM says it will instal its first two devices for free in 2016 and has asked towns around the world to put their names forward to be the first to have a solar sunflower erected on their land. More

 

© 2014