I got 99 problems, but a bill of materials isn’t one

In BISOL team, we were absolutely thrilled when we came across the article in pv magazine, written by John Fitzgerald Weaver, that we are sharing below, since it truly emphasizes what we stand for. BISOL Group aspires to the top-notch quality since its beginnings in 2004.


It is obvious that there is a major difference between solar manufacturers, as we have examples of solar power plants working since the 80s, but on the other hand, we have clients who ask us to help them with their revamping project on a 7-year-old power plant.


The answer to the top-notch quality that BISOL Group sticks to religiously is the absolute quality control across the full bill of materials, which is accessible only by rigorous testing. If only one of the subcomponents in your solar module performs badly, it will drag down the performance of your solar power plant and lower your energy yield.


This is exactly why we use only the top of the heap EVA foil, why our lamination is longer, why we invested in our own climate chamber, why our R&D tested every single material we ever used, why we perform peel test on every module and also why we developed our tailor-made BISOL tracking system, which offers us monitoring the most detailed-oriented monitoring of the module on all working stations.


While we invite you to really make sure which solar manufacturer you choose and why, we share this essential message from pv magazine.


Press picture: Kyocera Solar Solar installation in Huvudsta, Stockholm from 1984.

DNV GL reveals how important it is that solar power project developers consider the full solar module bill of materials when choosing a product.


Utility scale solar power purchase agreements have been increasing in length: 25 years and longer, with 25 year extension options. Utilities are obviously seeing value in decades of predictable electricity at a fixed price.


Kyocera, back in 2011, showed off a 1991 installation which it says ran with a “near-constant” efficiency level. The company has another solar power plant, recently verified, that’s been running since 1984 in Japan. SunPower’s modeling – backed by field research – suggests that 99% of their products have a 40 year useful life (meaning above 70% of original output). And SolarCity has suggested that standard solar modules from the big, cost focused players can run just fine for 35 years.


pv magazine sat down with Tara Doyle, head of business development at DNV GL, and Tristan Erion-Lorico, head of PV module business, at Intersolar North America to get their thoughts on the factors behind longevity – or lack thereof – in PV modules.


If you aspire to make great solar modules, DNV GL would suggest absolute quality control across the full bill of materials as their research shows that degradation decades out – or sometimes just months – is heavily dependent upon a discerning eye at the finest level. The company released these thoughts in their 2018 PV Module Reliability Scorecard (in browser viewer).


DNV GL – a global quality assurance and risk management company – puts solar module manufacturers through a broad suite of product examinations that takes many weeks, and demands up to 43 solar modules in the process. The company, whose origins stretch to 1864, generated $2.3 billion in revenue in 2017, from its 350 offices in 100 countries.