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Rocks to Roofs

silicon_silstal_preREC – An All In One Solar Company

Headquartered in Oslo – Norway, the REC Group is the world’s largest producer of silicon materials for photovoltaic (PV) applications and PV wafers, as well as a significant producer of cells and modules.

Simply put, one stop shopping in the photovoltaic manufacturing world.

It is organized in three divisions: REC Silicon, REC Wafer and REC Solar.

multi_crystal_waferREC Silicon – Moses Lake, Washington and Butte, Montana – USA
Solar grade silicon is the raw material that goes into the production of solar wafers and cells. The process starts with metallurgical grade silicon that is already about 98% pure. The metallurgical grade silicon is purified into silane gas by means of several distillation processes. Some of the silane gas is sold to manufactures of semiconductors, flat panel displays and thin film solar cells. Most of the gas is utilized by REC Silicon to make solar grade silicon. The silane gas is solidified by being deposited on slim silicon rods under high temperatures. The slim rods grow into solar grade silicon material. The end result is solar grade silicon that is more than 99.999% pure, ready to be shipped to silicon wafer manufacturers.

cellREC Wafer – Glomfjord and Herøya – Norway
In this division REC turns the solar grade silicon into leaf-thin wafers used in solar cells. Solar grade silicon is first put into crucibles and melted in special furnaces. It is then cooled from the bottom, crystallization begins and multicrystalline silicon is formed. The resulting massive ingot is cut into 16 bricks, each again sliced into leaf-thin wafers. The wafer is now ready to be processed into a solar cell.

multicrystalline_siliconREC Solar – Cells: Narvik – Norway | Modules: Glava – Sweden
Wafers are the starting material for solar cells, and cells for modules. The silicon wafer is first chemically treated to etch away saw damages and increase light absorption. A dopant is introduced into or onto the surface to make an electric field. A thin layer of antireflecting material is applied to the surface. Finally, electrical contacts are applied, normally by screen-printing. The cells are tested before they are framed and sealed in modules. The solar modules are sold to distributors, project developers and system integrators in the international PV market. In addition, REC Solar is engaged in a small residential systems installation business in South Africa.

Note: NOT to be confused with the REC Solar that does solar installations and consulting in the western United States. Although I hear they are an outstanding company in their own right.

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11 Responses to “Rocks to Roofs”

  1. Says:

    Rocks to Roofs | Forced Green…

    Simply put, one stop shopping in the photovoltaic manufacturing world….

  2. Barbara Swafford Says:

    Hi Linda,

    You always find the most fascinating stuff to share with us.

    Ironically, when I saw this title, it reminded me of how where we live. We see (not real often, but it happens), roofs where the homeowners have placed lava rocks on their roofs. The heat of the sun warms the rocks and apparently that helps to keep the homes warm. I do wonder though, what happens in the summer when they would prefer to keep their house cooler. Maybe that’s why I’m seeing less and less of the rock roofs. Not to mention, I don’t know if they “meet code”.

    Barbara Swaffords last blog post..Be A Person Who Needs People

  3. wilson Says:

    I heard about the REC before, but I didn’t know its headquarter is based on Oslo, Norway, Linda! Thanks for the infos 🙂

    wilsons last blog post..You Shouldn’t Fasting Even You’re Having Diarrhea!

  4. Iip Albanjary Says:

    the article enrich my understanding.

    Iip Albanjarys last blog post..Global Green New Deal

  5. Linda Says:

    Hi Barbara … You know, you have a point there. I have always wondered whether they worked in the summer or not. If they were here in Texas, air conditioning would have to work mighty hard.

  6. Linda Says:

    Hi Wilson … The company has so much going for it and it’s story needed to be at least mentioned.

  7. Linda Says:

    Hi Iip … glad we could help you out. 🙂

  8. Barbara Says:

    Hi Linda,

    Another great idea. I too wonder how it would be when you want to cool down from summer heat?

    Barbaras last blog post..Become Green!

  9. Bhingie Says:

    Wow! I didn’t know about that stuff.. Thanks for sharing that information.. Interesting and fascinating at the same time! 🙂

    Bhingies last blog post..High School Graduation

  10. Linda Says:

    Hi Barbara … Well, since the solar modules are the only part of the process to actually end up on your roof, they do a double job. Not only generating electricity but also the added benefit of shading the roof.

  11. Linda Says:

    Hi Bhingie … It is really interesting and fascinating. I find neat stuff and cannot wait to put it here! Thank You! 🙂

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