Question: how do you make solar shingles exciting? Answer: Stick one in Elon Musks hand, and a microphone in the other. The fanfare generated by Tesla Motors Energys latest product unveiling could well power a Model S from San Francisco to New York. Were not talking column inches here; were talking front pages, going viral, even appearing on the Facebook feeds of middle-aged soccer moms who think its "A super cool idea! x".
How does Musk do it? Its not as though the entrepreneur has struck upon some secret marketing or technical formula. Rather, it is the strength of his and his companies convictions that consistently serves them well.
But with great visibility comes great scrutiny, so pv magazine duly looked under the hood of Musks latest unveiling with solar industry veteran Barry Cinnamon to ask just what the promise and challenges of Telsas solar roof really are.
Cinnamon said: "BIPV is the holy grail for rooftop solar installations. I commend Tesla for launching such an innovative product in this category. From what I have seen so far, Tesla has done an admirable job of improving the aesthetics of solar shingles, certainly much better than any similar products I have installed or evaluated over the past 15 years. However, without more detail on their solar shingle costs and UL certifications it is difficult to evaluate the ultimate potential of this product.
"Ultimately, the biggest obstacle relates to total installed cost of solar shingles. Hopefully Tesla can overcome some of the following limitations of these solar shingle products:
· High cost of shingles on a per watt basis
· Since shingles run hotter, power output is typically less than conventional modules (effectively increasing per watt cost)
· Uneven shingle surfaces are not optimized to capture incident sunlight, reducing efficiency (effectively increasing per watt cost)
· Each shingle (or group of shingles) needs a pair of wire connections. These connections are expensive to purchase and install.
· Dummy shingles are needed to meet fire setbacks (typically 3? around roof), and to install in shaded areas."
SolarWorlds African adventure
Germanys SolarWorld is another clean energy company that is adept at securing headlines, but in recent times has tended to attract bad press following its controversial stance on the EU and U.S. trade tariffs imposed against China.
So it was somewhat heartening to learn that the companys 20 MW supply deal to a solar farm in Senegal was so well received online. Senegal has been beset by energy problems for many years, exacerbated by frequent droughts in many regions that have led to a rural exodus, thus piling demand on to already-overstretched city grids.
For Senegal and many other nations in West Africa, solar PV energy offers a cost-effective and environmentally friendly means of meeting these challenges, creating much-needed jobs in the meantime.
"With this project, we are once again documenting that PV represents a safe, clean and affordable solution for millions of people," said SolarWorld CEO Frank Asbeck. "It is a wise decision that the customer has bet on sustainability with durable products."
JA Solar settles up
But now back to more serious matters. While SolarWorlds legal battle with polysilicon producer Hemlock Semiconductor rumbles on, Chinese Tier-1 company JA Solar this week opted for a settlement on its own $1 billion lawsuit with Hemlock.
The lawsuit was originally filed by Hemlock in January 2015 but earlier this year the complaint was updated, pertaining to an alleged breach of polysilicon supply contracts. JA Solar was on the hook for close to $1 billion, but todays settlement saves the firm the hassle and expense of becoming embroiled in the type of legal battle currently facing Germanys SolarWorld, which was hit by Hemlock for a similar claim.
Details on JA Solars settlement are scant, but suffice to say an agreement has been struck that suits both parties: the Chinese firm avoids the threat of a $1 billion payout, while Hemlock has tied JA Solar in to a solar grade polysilicon supply agreement until October 31, 2026.
pv magazine understands that polysilicon is currently selling at around $15 per kilogram (kg) on the market, and it is highly likely that Hemlock has locked JA Solar in to a commitment to purchase polysilicon above that price. However, given that polysilicon prices can fluctuate wildly, locking in a price for the next decade may in fact be a sensible step by the Chinese firm.
EU dont want to do that
Some worrying news emerged from Europe this week after the Guardian newspaper reported that the priority dispatch status enjoyed by solar and wind power on European electricity grids could soon be over.
The newspaper reports that it has seen documents modeling four confidential impact assessment scenarios that could see carbon emissions rise by 10% if renewable sources lose their priority status.
The EUs renewable energy directive has been charged with becoming more flexible and cost-competitive, and is currently being redrafted to cover the period after 2020. According to the Guardian, one strong suggestion doing the rounds in Brussels is to strip priority dispatch for renewable energies in order to meet these cost-cutting goals a move that many see would be to the detriment of the EUs carbon reduction targets.