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Tag Archives: PV

The green power switch – all to solar

By Dave Elliott 

A new book ‘The Switch’ (Profile Books) by Chris Goodall suggests that the combination of cheap solar photovoltaics and cheap batteries will be a global winner. It is certainly true that the cost of PV solar has been falling rapidly, outstripping predictions, and even confounding most of the PV optimists, as the technology has improved and markets for it have built. Goodall sees this as a continuing process, at maybe up to a 40% annual growth rate, with PV soon becoming the dominant energy source globally, a view that he notes even some conservative oil companies now share. Lithium ion battery costs have also fallen significantly. So, with wind also providing inputs when there is no sun, we are all set!  A similar line was taken in Tony Seba’s book ‘Clean Disruption of Energy and Transportation’. PV and batteries are going to boom worldwide, and electric vehicles too.

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Solar PV and energy storage

By Dave Elliott

Some say that the vision of households and businesses moving largely off-grid by storing solar power generated during the day for use overnight is close to becoming a reality. The prospects for moving entirely off grid may be limited – most projects will still need grid links to allow for top-ups when solar input is low for long periods and the stores are exhausted. However, that still leaves a significant potential for self-generation and storage.                                                                                        (more…)

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Which way for solar?

By Dave Elliott

‘The Future of Solar’, a major report from the Massachusetts Institute of Technology, US, looks at solar photovoltaics (PV) and also concentrated solar power (CSP). On balance it backs solar PV, advanced thin film systems especially, but says that, even with just current crystalline silicon, ‘material inputs for c-Si PV generation are available in sufficient quantity to support expansion to terawatt scale’: http://mitei.mit.edu/futureofsolar (more…)

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The end of the FiT

By Dave Elliott

DECC’s consultation document on the Feed In Tariff (FiT) says: The future and size of the scheme will be determined by affordability criteria’, with the Levy Control Framework limits clearly being central. It goes on: ‘If following the consultation we consider that the scheme is unaffordable in light of these criteria, we propose ending generation tariffs for new applicants from January 2016 or, alternatively, further reducing the size of the scheme’s remaining budget available for the cap. This consultation seeks views on the impacts of scheme closure, whether implemented in the immediate term or as a phased closure over several years’. This seems not so much a consultation as an ultimatum: accept interim cuts or the whole thing goes now, but it will end anyway with, they say, their proposed ‘more stringent degression mechanism and deployment caps leading to the phased closure of the scheme in 2018-19’.

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Down on solar farms

By Dave Elliott

Solar, wave and tidal farms represent new ventures, adding to the renewable energy repertoire. But they are facing problems, in terms of finance and government support priorities, as I report in this two-part review of the UK situation, looking first at solar PV.

The good news is that PV solar overall is doing well in the UK, with more than 5GW in place, including roof-mounted arrays on private houses and the first wave of solar farms in fields. DECC says 10GW may be possible by 2020, perhaps even 20GW: https://www.gov.uk/government/publications/uk-solar-pv-strategy-part-1-roadmap-to-a-brighter-future  But DECC- and DEFRA -are  less keen on solar farms. (more…)

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Facts and fiction

By Dave Elliott

Is the truth out there? An extended Xmas Whimsy

It’s usual for there to be a spread of viewpoints on most issues, and it’s always worth looking at a range views, including ‘outlier’ ones! On that, this is fun: www.xonitek.com/press-room/company-news/the-stone-age-didnt-end-because-they-ran-out-of-stones/

However at times you can get weary of obsessive time wasters and yearn for clarity! Sadly that may not be easy to achieve.

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Prosumers – social innovation

By Dave Elliott

One of the big innovations in 2014 has been the rise of prosumers, consumers who generate their own power, fleshing out the vision Hermann Scheer outlined in his 2005 Solar Manisfesto:   ‘Since everybody can actively take part, even on an individual basis, a solar strategy is ‘open’ in terms of public involvement… It will become possible to undermine the traditional energy system with highly efficient small-technology systems, and to launch a rebellion with thousands of individual steps that will evolve into a revolution of millions of individual steps.’

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UK Solar boom leads to cuts

By Dave Elliott

PV solar is expanding fast in the UK, with over half a million buildings already using PV, and heading for 3GW in total. In addition to roof-top domestic units, over 120 utility-scale projects recently receiving planning approval, many of which are targeting completion within the next 12 months, according to the new NPD Solarbuzz UK Deal Tracker report. More than 325 solar farms in the MW class were scheduled to be completed mid year, over 60 with installed capacity above 10 MW. And an additional 444 large-scale ground-mounted solar PV farms are currently at various stages of planning: www.renewableenergyworld.com/rea/news/article/2014/05/uk-set-to-lead-utility-scale-solar-market-in-2014?cmpid=WNL-Friday-May2-2014

However, there are worries about visual intrusion, with Energy Minister Greg Barber saying ‘I do not want solar farms to become the new onshore wind. I do not want to see unrestricted growth of solar farms in the British countryside’ and that ‘We don’t want the whole solar sector damaged by a few solar farms that communities don’t want’. Instead, backing a new DECC Solar strategy, he announced plans to turn the Government-owned buildings, as well as factories, supermarkets and car parks, into ‘solar hubs’. He said: ‘There is massive potential to turn our large buildings into power stations and we must seize the opportunity this offers to boost our economy as part of our long term economic plan’. It was estimated that there were 250,000 hectares of south facing commercial rooftops.

In a further initiative, the Dept. for Education is working on ways to improve energy efficiency across the 22,000 schools in England and solar is one option. Education Secretary Michael Gove said: ‘Solar panels are a sensible choice for schools, particularly in terms of the financial benefits they can bring. It is also a great way  for pupils to engage with environmental issues and think about where energy comes from.’

Overall, the Government aims to install 1GW solar PV generating capacity on the Government estate through a major programme led by DECC and Cabinet Office. As part of this, the Government will lead an initiative specifically targeted at England and Wales’ 24,000 schools. It will identify the first 500MW of deployment this year and seek private finance partners to incentivise installation.

The new Strategy follows the “Roadmap to a Brighter Future” which was published last October. Like that, it is very positive, talking of the possibility of getting up to 10GW of PV in place by 2020, and maybe 20GW. It showcases ‘how the UK is at the forefront of innovation in solar PV and its importance in driving further cost reduction, meeting the challenges of balancing the electricity system, securing carbon lifecycle benefits, and identifying new financial models to help households invest’. But as the Roadmap had noted ‘new solar installations will need to be appropriately sited, give proper weight to environmental considerations such as landscape, heritage and local amenity, and provide opportunities for communities to influence decisions that affect them’. https://www.gov.uk/government/publications/uk-solar-pv-strategy-part-1-roadmap-to-a-brighter-future

Issues like this obviously worry the likes of the Daily Telegraph, which pointed out that solar farm deployment had expanded from 46 large-scale solar farm projects at the end of March 2012 to 184 at the end of February this year. It noted that further 48 were due to start operating in March and an additional 194 projects have planning permission and are awaiting construction. And, as noted above, many more were envisaged. Its clearly an issue, although the  RSPB and the National Trust have come out in support, saying that, if well planned, solar farms can be better for wildlife than traditional farming and have lent their support to new guidance from the industry.  Even so, DECC has seen fit to propose cutting  Renewables Obligation support levels for large solar farms, its ostensible justification being that, with the cost of solar panels falling, growth had been ‘much stronger than anticipated in government modeling.’

DECC said that, left as it was, large scale PV might reach 5GW by 2017, well above the 4GW maximum by 2020 they thought could be afforded, given the cap on spending on low carbon options designed to protect consumers from undue price rises. So DECC proposed that the Renewables Obligation (RO) for new solar PV capacity above 5MW be closed entirely from 1st April 2015, across England, Wales and Scotland, although with a grace period to protect developers who have already made significant financial commitments. The RO is in any case to close down completely for all new renewable projects from 2017, with the new Contracts for a Difference system taking over, and DECC say this is likely to be a more cost effective path for larger PV.

That may be true, but it’s as yet uncertain and quite complex, and understandably the Solar Trade Association was not pleased with the news of a new review : ‘We are disappointed that DECC is launching another review on the solar industry. Investor confidence and market stability is absolutely essential in order to deliver sustained cost reductions for consumers and a healthy solar industry for UK plc. We are also concerned that any excessively hasty push for cheap solar will come at the cost of achieving quality in the solar farm industry, which is essential to retain public support.

More aggressively, PV installer Solar Century said  ‘Large-scale solar is already significantly cheaper than offshore wind and will be competitive with onshore wind by 2017. In deliberately setting out to strangle the growth of cheaper solar from 2015, Secretary of State Davey can no longer claim that government policy will deliver the most cost-effective mix of technologies by 2020.’

The RO cut reflects the wider issue of overall allocations to renewables. They are constrained by the low carbon  project budget limit, and DECC says that rapid acceleration of solar farm deployment had ‘the potential to affect the financial incentives budget under the Levy Control Framework’ which caps overall spending on green energy. So other projects could suffer. The issue is that, although PV costs are falling, that may not be sufficient to allow unconstrained growth, although of course it has been growth in PV markets around the world that has helped to cut costs. Much of that expansion has been due the Feed-In Tariffs around the EU (including the FiT for small domestic projects in the UK), but the FiTs have all been cut back and, in much of the EU, may soon be replaced by more market orientated auction systems, a bit like the UKs new Contracts for a Difference (CfD), following a new policy proposed by the European Commission.  A version of that is soon to be adopted in Germany. You can see that either as a disaster or as evidence that PV is becoming economically viable.  Be that as it may, domestic-scale PV is unlikely to get any support from the CfD in the UK, mainly just from the FiT system, if that survives, but as DECC says, larger projects can get support from the CfD, although there were none in the first interim CfD round.

Can large PV get its cost down?  DECC says ‘Solar is anticipated to be the first large-scale renewable technology to be able to deploy without financial support at some point in the mid-to-late 2020s’.   If that is true for large projects too, then even before 2020, it could be that the cost of larger expansion may be much less than feared. Or was it that they just wanted to inhibit large, allegedly intrusive, solar farms? But then what happens if large schemes do succeed under the CfD and come in at low cost?

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Burning Answer

By Dave Elliott

In his powerful and eloquent new book, The Burning Answer, which seems to be a response to Mike Berners-Lee’s book on climate change, The Burning Question, Imperial College Professor of Physics Keith Barnham contends that, despite our much higher energy demands now than in earlier periods of human evolution, our sun can provide all our primary energy needs again. Solar technology can save us from the threats of global warming, diminishing oil resources and nuclear disaster, if we take the necessary action.

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Green energy for Africa

By Dave Elliott

The International Renewable Energy Agency says that Africa has the potential and the ability to utilise its renewable resources to fuel the majority of its future growth with renewable energy. It adds ‘doing so would be economically competitive with other solutions, would unlock economies of scale, and would offer substantial benefits in terms of equitable development, local value creation, energy security, and environmental sustainability’.

That seems a bold claim both technologically and economically, and also politically. But the renewable resource is very large (for solar especially) and the technologies are getting cheaper fast. However, with 54 very unevenly developed countries on the huge continent, whether the political and institutional cohesion is there for a co-ordinate push is  less certain. (more…)

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