The Chinese National Energy Administration has announced via the state run newspaper China Daily that they will be seeking to produce around 15 per cent of all the country’s energy by renewable means within the next 10 years.

China, despite being criticised for its heavily industrialised, polluting economy and images of Beijing obscured by dense smog during the 2008 Olympic Games, the government is taking proactive steps towards reducing carbon emissions with measures that would shame certain other attendees of the Copenhagen climate summit.

With the growing realisation of the fallibility on basing the huge Chinese economy on fossil fuel imports which could become untenable within the next 25 years, the Beijing government is planning to spend billions of dollars in investing in solar and wind farm sites in addition to research projects which could keep China at the cutting edge of green energy generation.

Renewable energy generation grew by 1 per cent in China in the last 12 months with the government hopeful that figures will grow from the present 9.9 per cent to 15 per cent by 2020. The Chinese government is keen to diversify its economy as well as its means of energy generation with the dual purpose of slowing the effects of climate change and making the economy more robust in the face of any potential fuel crises which could arise in the near future.

In spite of passing legislation designed to have an immediate impact on renewable energy uptake such as the feed-in tariff, a mechanism to incentivise investment in green technologies, government spokesman Zhang Guobao is realistic about the timescales involved in such projects. Speaking to China Daily, Zhang commented that,

“Power projects take a long time to be up and running, and we are basically allowing five years to complete them although it is a 10-year program, otherwise, the facilities cannot be put into use by 2020.”

Zhang added, “It appears that some local governments approved energy-guzzling projects during economic crisis so only by fully implementing our energy saving regulations can we realize economic growth with less energy consumption.”

The winter months have brought lots of snowfalls, or as they are known in the world of solar energy, ’shading events.’ You might be forgiven for wondering what exactly happens to the performance of solar panels when they are covered in snow, or anything else for that matter.

Shading is a big issue for solar arrays. A small amount of shading on one solar panel can result in a big power loss for the entire system. This is because of how they are connected together; a solar panel is made of a number of solar cells connected in series. Each solar cell has a current of around 8 Amps and a small voltage of 0.6V or so when under full sunlight. For those who remember their physics classes from school, this means that when they are connected in series the voltages add up but the current stays equal. Solar panels are then connected together in series to make a string, so the current still stays the same (on large arrays multiple strings are connected in parallel).

What this means is that if one solar panel, or even one cell of one solar panel is affected, it will affect all the others. When a cell is shaded its output current decreases, which means the current for all the other cells and modules is also limited. So one small patch of shade can disproportionately reduce the power output of the whole system.
This effect can be limited by a number of means.

The best way is to make sure your solar panels are not going to be shaded in the first place. This should be checked as part of the site survey, conducted by your MCS accredited installer. You should ensure that nothing will shade the modules during the middle of the day, when your system should be producing the most energy. Shading can be checked using a special design tools that show the path of the sun behind various shading objects. This can be either a lens that shows the horizon and path of the sun in front of you, or a full design software package that uses photographs of the surroundings.

With snow it does help to clear it off. But there isn’t usually much sun when its snowing, and if the sun does come out, the snow melts pretty quickly.

If you cannot eliminate shading as is often the case in built up areas, there are several technologies that can limit the effect of it. Many solar panels now include bypass diodes that disconnect groups of solar cells if they are shaded. It is fairly crude but often works well. When you buy solar panels make sure to ask about bypass diodes.

A second technology that is not available yet in Europe but soon will be is distributed conversion. Here, rather than have power electronics (like the inverter) positioned all in one place, you have some electronics placed on each module. This allows each module to operate independently. One company in the US called Enphase claims this technology increases power output by upto 25 percent.

These are all things to bear in mind when buying a photovoltaic system.

Solar thermal heating systems could be something of a common sight on south-facing roofs in the UK with the introduction of a feed-in tariff. Previously, the high cost of solar thermal kits has put off householders wishing to invest in renewable energy generation but with the announcement of the introduction of feed-in tariffs for solar thermal in the UK in April 2011, solar thermal installation is set to become much more attractive.

The government’s feed-in tariff scheme to be called the Renewable Heat Incentive, will work by offering small-scale producers of renewable energy premium rates over a period of around 25 years for units of energy fed back into the national grid. Feed-in tariffs have been successful in countries such as Germany where they have proved to be an extremely effective way of off-setting the high costs of investing in solar power equipment.

Germany saw a massive uptake in all types of solar energy generation with tariff schemes rendering investments viable in the face of competition from traditional fossil fuel sources. For more information on how the tariff legislation is broken down year by year all of the information is available on solarfeedintariff.co.uk

In the UK, the essential figures are that homeowners wishing to invest in a typical £5000 solar thermal kit for their properties can hope to expect healthy returns on investment of around £500 p/a over a period of around 25 years not including the average £100 saving on utility bills per year. Such returns and savings are the basis of the tariff scheme and solarfeedintariff.co.uk is hopeful that these incentives will be sufficient to help the UK solar industry take off.

Through the installation of roof mounted solar panels, the sun’s energy is absorbed by the panel’s in-built technology which in turn is used to heat the water. The hot water is pumped through storage cylinders where it is heated further, providing households with south-facing roofs a good supply of hot water through the summer months and a contribution to water heating energy through the gloomier seasons.

Households aside, the government is also hopeful that the tariff legislation will bring about a grassroot change in attitude towards green energy as a whole and see technologies such as solar thermal become commonplace rather than an exceptional sight in the UK.

Solarfeedintariff.co.uk is already hopeful that with the obvious environmental benefits of utilising renewable energy sources along with the financial incentives built in to green energy schemes, the UK is set to follow in the footsteps of what are generally regarded to be the ‘greener’ nations such as Germany and Sweden. Households and community projects will all be set to capitalise on the feed-in tariff in the coming years with cash savings, investment yields and carbon emission reduction providing ample rewards for investors and communities.

When thinking about renewable electricity for your home, two options spring to mind; photovoltaic panels and small wind turbines. But which one should you choose? The government has introduced a feed-in-tariff that pays a subsidized amount for the electricity they produce and the amount paid for small wind turbines is similar to that paid for small PV systems (34p/kWh compared to 41p/kWh).

The key criteria to deciding which technology will be the most profitable is the cost of producing a unit of energy from each one. For this you need to factor in the up front costs such as equipment and installation, and then look at how much energy they will produce once out there over an average year. Without going too heavily into numbers my argument is that in some instances, micro-wind turbines will have a lower cost of energy than solar panels, but for the majority of cases solar panels will be better and this can be explained by some basic science.

Without a doubt, on a large scale, wind energy is cheaper than solar. The cost of energy from large-scale wind farms is somewhere around 10p/kWh whereas the cost of energy from large-scale solar is three to four times greater at present. Big wind turbines are now very well designed products and many years of industry development means that the costs have fallen dramatically and continue to do so. Big solar farms are also rapidly reducing in cost and make a lot of sense in some locations, particularly in the many regions where wind farms are not suitable, but for now they do not compete.

On the small scale however, the economics are drastically different. As the size of a solar installation decreases, the performance falls linearly with the amount of area used, and therefore the cost of energy does not change so dramatically. In contrast, as wind turbines get smaller their performance gets disproportionately worse. This is for two mains reasons:

The first reason is that as the turbine blade length gets shorter, the ‘swept-area’ decreases quadratically. This means that if you decrease the length of a blade from 80 meters to 40 meters, the area covered by the blade decreases from 20 thousand square meters to just 5 thousand. The ‘swept-area’ determines how much wind energy the turbine can use. So when you decrease the blade length you still need all the expensive moving parts like the generator, but you get disproportionally less energy – for one big wind turbine you would need thousands of smaller ones to cover the same area. The second reason is that where you use micro-wind turbines the wind speed is generally slower. This is because most of us live in built up areas where there are other buildings nearby. These buildings disrupt the wind, making it irregular and slow. Wind speed is crucial to the effectiveness of a wind turbine, again because the energy contained in the wind is disproportional to its speed. If the wind speed drops by a factor of 2, the energy produced by a wind turbine decreases by a factor of 4. Comparing most built up areas, the average wind speed is much lower than half the wind speed found high-up in open spaces where you find most wind farms.

These two factors combine to mean that for most homeowners solar panels are the most sensible and safest option. Of course, if you live near an open space and get a lot of wind then a micro-wind turbine could be a great investment. However, if you do live near a windy open space, I would suggest trying to build as big a wind turbine as possible, as their cost effectiveness increases dramatically with size.

Solarfeedintariff.co.uk Needs You!

In our efforts to become a better information resource for people interested in the UK’s upcoming feed-in-tariff, we are looking for contributions from our own readership. Do you have experience with solar energy that you would like to share?

Perhaps you recently had a micro-generation system fitted and have inside information on what it really takes and what the benefits are?

Do you work in a field related to the feed in tariff? If so, and you would like to share your views, then please contact us at enquiries@solarfeedintariff.co.uk.

We are looking for articles of around 400-500 words, and these can be published anonymously or not, depending on your preference. We cannot promise to publish all articles but will do our best. You can also let us know beforehand if you would like to write something and we will provide some early feedback.

Thanks for your help and support!

The UK feed-in-tariff announcement has generated a lot of interest in solar energy for homeowners. But what of the interest for organisations such as farms, businesses or local communities?

Some in the press have criticised the government’s proposed feed in tariff plans because they do not offer specific incentives to businesses as well as private individuals.

I would argue that the feed in tariff as it stands applies equally well to enterprises as it does homeowners. Businesses are often able to think longer term about investments. The incentives for installations above 50kW are still attractive for commercial roofspaces, especially if businesses use the electricity they generate for themselves, meaning that installing solar would be a prudent investment to have on a balance sheet. That is not to mention the kudos that comes with being a net exporter of green electricity.

In Germany the commercial rooftop segment of the market is the largest by volume, and with a feed in tariff pricing that now looks rather similar to the UK’s. We may therefore expect that companies start to explore using their roof space for PV. In fact if they haven’t thought of it yet, someone else will soon be approaching them with an offer.

That’s not to say the governments plans are flawless however. The UK is still pitifully behind the rest of Europe when it comes to renewable energy generation and particularly microgeneration.

Still lurking in government policy the ridiculously low target of 2 percent of energy coming from microgeneration by 2020. This is incomprehensible given that Germany is already at 4 percent from solar and other countries like Denmark with biomass gain nearly 40 percent from microgen. Surely this target must be revised!

Speaking as a professional in the global solar industry, the new UK feed in tariff has put us on the radar (a bit). Rather than smirking when I mention the potential for solar in the UK, my colleagues are now starting to take some interest…

After the long wait we finally know for sure the amount to be paid to producers of solar electricity under the clean energy cash back scheme. The result of a consultation process lasting 6 months, the initial outlook for solar energy in the UK is positive.

In comparison with the provisional figures released last year, there has been an across the board increase in the generation tariff paid per kWh for all sizes of installations. The table below shows the feed in tariff as they stand now;

There some important new features of the arrangement;

-         The export tariff (the amount paid when energy is fed into the grid) is reduced to 3p/kWh. This will increase the motivation for generators to use the energy for themselves since retail electricity prices are normally significantly more than 3p/kWh.

-         The lifetime of the FIT is 25 years. This is in line with other feed in tariffs around Europe and increases the attractiveness of solar (compared with 20 years) as it increases the security of the investment.

-         The feed in tariffs are linked to inflation. This means payments will increase over time in absolute terms. This is something that we had been campaigning for as ‘inflation risk’ is a significant worry that we have encountered in prospective solar producers.

-         The feed in tariffs can be legally assigned to any party. This allows room for innovative leasing models that are popular in Europe and the US where the either a third party leases roof space or a home owner leases the solar panels system.

Our initial calculations show that this level of tariff should result in 7-8% annual returns for homeowners retrofitting PV systems under 4kW. This means solar will compete with the best investment funds out there for investors pounds.

For Solarfeedintariff.co.uk this announcement represents a positive move by the government. It shows that during the consultation process it has listened to voices in the solar industry (hopefully including ours) and taken note of what is happening in the rest of Europe. Germany has shown that microgeneration, in particular solar PV generation can contribute very significant amounts of the nation’s energy and that a feed-in-tariff is the best way to encourage this growth.

Claims that have recently been made in the press that solar panels are merely ‘eco-bling,’ exhibit complete ignorance of what is happening in the rest of the world. Unfortunately this is a common attitude in the UK, the last major European economy to implement a feed-in-tariff. Hopefully, now with the tariff announced, this will change. We fully expect strong growth in the UK solar industry. This is a good day for Britain and our hopes of achieving our emissions targets.

Stay tuned for more updates.

With the growing global trend towards renewable energy Britain is finally taking the first fundamental steps towards large scale micro-generation of electricity. With the UK government’s announcement that they will be going ahead with the development of a 100 billion pound wind farm in a giant off shore project, the UK is set to continue as Europe’s leading exponent of wind energy.

However, with wind representing a mere 0.5% of Britain’s energy generation, the future for wind and other important renewable energy means will come in the form of households producing their own electricity with small scale micro-generation kits, installed on their property.

These such small scale endeavours, while initially expensive, have been rendered viable through the announcement of the imminent introduction of a feed-in tariff which will offer homeowners ‘cash back’ for surplus renewable energy which is fed back into the national grid. In the UK, this financial incentive will come in the guise of the much anticipated ‘Clean Energy Cash Back’ scheme but elsewhere they have also proved successful at encouraging homeowners to install their own renewable energy kits.

Solar potential for UK households

Despite the gloomy skies and similarly murky outlook for the economy, the UK has the potential to become a competitive player in the world of micro-generation and emulate the leading light of renewable energy, namely Germany. Homeowners who may currently wish to invest in solar panels for their property have the twin hurdles of finance and confusion to overcome before parting with cash.

Fortunately, with regards to solar photovoltaic (PV) technology, investors will have the costs of installation (typically around 6000 pounds) softened through savings on energy costs; amounting to around 250 pounds p/a. Also, with cash back payments on surplus energy from the utility companies a typical household with a solar pv kit could hope to repay the initial outlay while at the same time saving around 1 tonne of carbon emissions p/a.

Similarly, solar thermal can prove costly to install with a typical homeowner having to spend around 4000 pounds on a kit but with the obvious advantages of tariff incentives helping to recoup capital outlay along with savings on energy bills. With the introduction of the Clean Energy Cash Back System in April, homeowners looking to make sound investments in their property will be investigating the potential of solar energy for their homes. The downside of new technology of course is the leap into the great unknown with unscrupulous agents, manufactuers and installers looking to capitalise on consumer naivity.

Fortunately solarfeedintariff.co.uk is seeking to make investing in solar micro-generation simpler by offering a quotation service designed to eradicate the need for time consuming market research by offerig the latest, expert advice on the best option for your home. For more information on the solar quotation service, please visit:

http://solarfeedintariff.co.uk/solar-installation/

If I had a pound for every time I’d heard that comment I’d be a rich man. That’s not to say it’s a dumb question though, it’s a perfectly reasonable question – it’s clearly sunnier in the south of Spain than in Blackpool. The question is by how much and does it matter?

At any given moment its not easy to predict how it’s going to be, but over the course of the year, the overall sunniness level can be accurately measured and predicted. This value is called the irradiation and can be defined as the amount of energy hitting a 1 square metre area pointed towards the sun over a whole year. In the south of England, according to the European Commission’s Joint Research Center, we get 1100 – 1200 kWh of irradiation per year (a kilowatt hour, kWh, is a typical unit of energy). In Devon and Cornwall you get between 1200-1300 kWh per year and in the North of England and Scotland its 1000-1000 kWh. In contrast, Barcelona gets 1700-1800 kWh of irradiation per year and in the very south of Spain and Italy it can get up to over 2000 kWh per year. So comparing London to Barcelona that’s 50% more irradiation for the Catalonians, which is significant but doesn’t mean we should give up hope for solar energy in the UK.

There are some other factors to consider here; irradiation doesn’t correspond exactly to the amount of solar energy you get out of a PV system. The best solar panels on the market today are only around 18% efficient under good conditions. At high temperatures for example, solar panels become less efficient. If the temperature of the solar panels increases by 20oC, they will only produce around 90% of the energy they would at room temperature. This means that on a clear but cold day in London, solar panels could produce more energy than a hot and sunny day in Spain.

Another factor is the difference between clear days and cloudy days. In the UK we get a lot of cloudy weather which blocks the sun and leads to ‘diffuse’ sunlight (meaning from all directions) rather than ‘direct’ sunlight. The four sunniest months of the year in the UK (May-August) deliver 5 times as much solar energy as the four winter months of the year (Nov-Feb). Solar panels can still turn diffuse light into electricity though, and there is evidence to suggest that some types of solar panels are better at collecting it that others. This means we may be able to improve the difference between London and Barcelona by using different technologies.

Despite these factors though, solar panels in Spain will of course still produce more energy than solar panels in the UK, which makes energy from solar cheaper in Spain than over here. But in some ways what happens in Spain is irrelevant, the question that really matters is whether solar energy makes sense or not in the UK.

I would say it does. With the feed-in-tariff, installing solar panels in the UK instantly becomes a highly profitable exercise yielding significantly better returns than most savings accounts (discussed in a previous article). Much of Germany, where over half the world’s solar panels were installed in 2009, is on the same latitude as the UK (northern Germany is in-line with Newcastle). So if it works over there, it should work over here.
The second point is that prices of solar energy systems are falling and electricity prices are due to rise, leading to so called ‘grid parity’ – the point at which solar electricity costs the same as regular electricity and can flourish without government support.

Because Spain is sunnier, grid parity is expected to happen there sooner than here (some claim it may have already happened in certain cases). Several predictions indicate however (in particular those from the EPIA – European Photovoltaic Industry Association), that we can expect grid parity in the UK as early as 2013 or 2014. In just a few years solar energy will be competing on real terms with retail electricity prices, hardly a waste of time in my opinion.

So the next time someone greets you with incredulity at the prospect of using solar panels in the UK, you at least have some numbers to back yourself up…

Solarfeedintariff.co.uk, the group of solar energy specialists dedicated to green issues and leading exponents of solar energy has announced that it will be offering a solar installation quotation service via its website.

To request a quote CLICK HERE

The service will help both businesses and homeowners navigate the often complex world of green investments by offering advice as to the best solar packages available.

With a broad range of experience in the solar photovoltaic sector, solarfeedintariff.co.uk is aware that many investors in solar panels are put off by the all too confusing array of products and technology available in the market.

Solarfeedintariff.co.uk will seek to eradicate any confusion and clarify doubts by offering the right product to customers depending on their needs.

Ian Spencer, Managing Director of Solarfeedintariff.co.uk stated that,

“Ever since the website was launched, we have had enquiries requesting quotes for Solar Installation, especially with the Feed In Tariff (FIT) due to be launched in April. WE are now delighted we can offer this services, using one of the leading Solar Installation firms in the UK”

With great opportunities available to reduce energy costs and of course, help slow the process of global warming solarfeedintariff.co.uk will be rolling out a service which will help both households and businesses save money, also taking advantage of the UK government’s Clean Energy Cash Back System, designed to incentivise investments in green energy through cash rewards.

With a vast array of products on the market, often from far away manufacturing bases in the far east, it can often be difficult for first time solar panel purchasers to discern the good companies from the… not so good and to calculate whether attractive looking offers are actually as great value as they first appear.

With a sharp eye on the market and with a passion for promoting solar installation in the UK, Solarfeedintariff.co.uk is keen to make the whole process of solar panel purchase and installation as smooth as possible, offering peace of mind to customers and promoting customer friendly, ethical companies.

Ian Spencer added,

“We expect the demand for Solar Installation quotes to rapidly rise the nearer we get to April and the dramatically increase on the Feed In Tariff is more widely recognised and known about. Therefore, we are pleased to be able to offer this service now for all of our site visitors”

To request a quote CLICK HERE