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A Solar Panel Quality Manifesto

Paula Mints, Navigant Consulting
September 06, 2012  |  10 Comments

Falling prices for PV technology – new average price for inventory, $0.65/Wp, off brand b- and c-grade modules, falling margins, failing PV companies, fraud, poorly installed systems and even counterfeit module product that carries a name brand and is really an off brand – good grief, what's an industry to do? Any day now we may encounter a guy on the corner with a pile of counterfeit modules, an armful of fake Rolexes and a pile of faux-Gucci purses all to be had at $9.99.

The PV industry needs to get back to its quality roots. This means it needs to stop making excuses for buying b- and c-grade modules.  These modules once were, and still should be rejected.  In past years, they would have been rejected.  Correction, they might have been used for a project in the developing world – and this is not okay either. 

Lower grade and thus lower quality PV modules are a recent phenomenon, just as bankability (a phrase developed by the people who brought us the former financial crisis and the current Libor crisis) is relatively recent.  Previously, industry participants knew that delivering high quality, clean, reliable electricity were the industry goals and that these goals were not mutually exclusive from the goal of profitability.  There are those who would laud the availability of low price b- and c-grade technology as progress – they are wrong. There are those who just want to get PV into the ground or up on the roof as fast as possible even at the risk of failure – after all, the modules are a commodity and can be easily replaced…right?  Wrong.

It is time we decided what business we are really in and what we want this business to be – are we part of the solution towards cleaner air for all and quality jobs, or are we simply developing a commodity that can be bought and sold with little or no moral imperative? Most of us got into solar to effect a change and to have careers that publically reflected our values.  Is it “touchy-feely” to want to change the world?  Maybe so, but perhaps we can marry the values of clean, reliable energy with profits. 

As manufacturer failures pile up like a massive traffic accident it should be impossible to deny that prices are too low, yet, sadly, many continue to claim that the low prices are progress.  In the U.S. the decision to apply tariffs (retroactively) to PV technology from China has divided the industry.  The common goal of deploying solar has been largely put aside in favor of industry infighting. Rhetorical question … can a small, emerging industry afford to expend its energy in this manner?  Meanwhile, acceptance of lower quality products at low prices has become commonplace and this will likely cost us dearly. 

So, as in the movie Network, rise up out of your seats, step away from your computers and refuse to accept any less than the highest quality PV – insist on support for R&D so that technology advancement (lower cost, higher efficiency) can continue.  Work together to standardize permitting costs because that alone would lower installation costs.  In sum, go back to solar’s roots, where changing the world was indeed the point of it all. 

                 Figure 1: Average Prices to the first point of sale and for Inventory

View larger version

Lead image: Grade A via Shutterstock

10 Comments

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chris sutor
chris sutor
September 10, 2012
A great article. Something that we've been promoting all through the recent "rush to the bottom" is to ensure that quality is not sacrificed. Choose your manufacturers wisely, and check your product quality carefully. We've seen many instances where there is a price competitive situation, but a careful examination of the facts means that the most cost effective (quality, at the right price) products win out.

The UK has the Microgeneration Certification Scheme. This is pretty much a ratification of the more widely recognised IEC standards and leaves plenty of scope for abuse, albeit less that would otherwise be the case if it were not there. And that's why we believe that key consultants, suppliers and installers should be bringing in the right advice to customers to help them make a decision that's not simply based on price. Note that this is not to say that a low price is indicative of low quality - in a developing industry we know that price advantages can continually be gained whilst maintaining costs, it's simply to say that care should be taken and an informed decision should be made.

Thanks. Chris (www.allecoenergy.co.uk)
Yotam Ariel
Yotam Ariel
September 8, 2012
Thanks. I agree with the article. Users have no idea, at the time of buying a solar module, whether it will deliver the promised performance. In the market segment we work, under-performance is tragic, since we focus on bringing solar to villager in Africa (and other developing countries). I often chat with importers in Africa, and they say they are getting suspiciously low price, and they actually proceed to buy those modules, then, sell to villagers who are full of hope to finally escape the cycle of poverty, only to find out a year or two later that they invested their hard earned money in a sub-standard product. (forcing them to, again, start buying kerosene, diesel..) But the solution is so simple. It has been used in many other industries (fighting fake medicines in Nigeria) (http://sproxil.com/) So, we have launched BennuValue, which is like sproxil but for quality solar products. Further more, we can get feedback from users even two years after they bought a product, and publish it. It will shine light on which factories are committed, and which are not. And villagers can easily, at the time of buying, verify the solar module quality by simply sending an SMS from their mobile phone, and receiving a confirmation from us (and after-sales support forever). Thanks, Yotam (http://bennu-solar.com/) (http://www.bennuvalue.com/)
Dick Maclay
Dick Maclay
September 7, 2012
The author contends that declining prices are not a good thing in a developing industry which is attempting to become economically competitive with grid power. In every industry that has reached a stable maturity only the best and most efficient companies have survived. We do not want some arrested development of the solar industry in order to keep the losers on life support.
Whit Elfner
Whit Elfner
September 7, 2012
WOW!

The Blemished panels I purchased were Evergreen Solar panels, 1st set were US made, 2nd set made in China. Both sets came with tested output and full warranty. They were delievered with the output results by serial number and carry full warranty and UL/ETL listing.

The 5 almost 6 year old panels are operating perfectly. And could (and would) have beeen returned if thay had not. Perhaps others sell blemished panels with out warranty, but in my years on Solar forums helping others, I haven't seen 'B' rated panels or Blemished panels that did not have full warranty.
ANONYMOUS
September 7, 2012
I was asked by someone who has blemished modules installed if I had ever come across a situation where the modules turned black and ceased to function (these did). I said I haven't heard of it. I suspect that less than A grade could be a safety problem. Less than A grade may just have blemishes or they may have been rejected for electrical or power output problems. The company selling them to individuals doesn't know because the company that sold the modules to them don't say. Caveat Emptor.
Howard Barikmo
Howard Barikmo
September 7, 2012
Good subject matter, Paula:
Are you aware of the QA Task Force, sponsored by NREL of the US, AIST of Japan, and the EU JRC? It is addressing the conformity assessment of modules during the manufacture stages to assure good, quality product, with another goal of increasing reliability to get to the expected golden 30-year lifetime of PV modules.
The industry is in process of addressing the problem--and needs support from whomever can provide the support--to include Navigant and others who are keeping their fingers on the pulse of PV.
Best wishes,
Howard Barikmo
Alexandre Minuzzo
Alexandre Minuzzo
September 7, 2012
Some companies are taking action to get each panels tested independently, before it's even shipped.
a) Check out this Testing Center. You can get 100% of your panels checked for a fair cost (www.sts-certified.com)
b) To: will-sumner-170636, you can get some datapoints here about modules defects.
http://www.sts-certified.com/index.php?option=com_content&view=article&id=24&Itemid=138
Solutions are emerging, which a TUV/UL/MCS Certificate, relying on a factory inspection and sample modules testing aren't bringing a truly reliable solution when it comes to mass production.
Whit Elfner
Whit Elfner
September 7, 2012
The article makes no sense, unless there is some 'perfect world' that she wants us to live in, I guess she only buys perfect fruit from perfect store. The 'B' grade or Blemished panels I have purchased 5 years ago and last fall carry full warranty. They are simply panels that aren't cosmetically perfect but expected to have the same life expectancy.

If she has other things in mind she should state that. From what I have read and experienced 'B' or Blemished panels are just as safe, reliable a product as 'A' grade panels, just with a cosmetic blemish. If your suggesting these panels should be destroyed for these faults that's just NUTS!!!

Panels that have inherent safety issues I can support corrective action or recycling, but if a cell hasn't a safety issue, the added energy to recycle or destroy is counter productive and would increase the cost in stored energy(energy to create) as well as the finished products cost... Might even add to the view that the citizens of the United States are the most wasteful in the world...
ANONYMOUS
September 7, 2012
In the UK we have a certification scheme. This means everything used is supposed to offer some quality protection. Despite this I had a faulty DC switch on my installation and my installer told me whilst he was sorting this out that he had installed a faulty Chinese module (well known brand) that was leaking earth. However, I think the scheme offers some protection.

Neil http://www.theoillamp.co.uk/
Will Sumner
Will Sumner
September 6, 2012
I don't agree with you, you and I don't disagree with you. I felt like your paper was winding up to supply a litany of abuses and anecdotes against the offending panels, when instead it simply ended after having only stated a hypothesis. Ending the essay without evidence cuts your argument off at the knees. Please, why do you think that installing these panels is on the rise, why is it bad for the environment, and why is it bad for the industry - even in the developing world? I was very keen to know! Thanks!

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Paula Mints

Paula Mints

All Solar, All of the time -- I started my solar market research career with Strategies Unlimited in 1998, moved to Navigant in 2005 and am now I am excited to announce the founding of a new company, Paula Mints Solar PV Market Research....
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