PV Crystalox Solar
Solar wafer manufacturer and supplier of multicrystalline silicon products for photovoltaic cell producers.
Last updated August 31, 2026
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Overview
PV Crystalox Solar plc was a United Kingdom-based photovoltaic materials company serving manufacturers of solar cells. Its principal product was multicrystalline silicon wafer, an intermediate component used in the production of solar electricity modules. Rather than selling finished consumer solar systems, the company operated within the upstream and midstream portions of the photovoltaic supply chain: silicon was purified and processed, crystallized into ingots, sliced into wafers, and then supplied to other companies for cell and module manufacturing. The business originated in 1982 as Crystalox, a private company established in Wantage, Oxfordshire. Its initial activities were broader than photovoltaics, concentrating on the design and manufacture of equipment used in the purification and crystal growth of metals, alloys, semiconductors, and electro-optic materials. This engineering and materials background provided the technical base for its later move into solar silicon. In 1990, Crystalox began developing industrial-scale systems for the directional solidification of multicrystalline silicon for solar-cell applications, marking a decisive shift toward the photovoltaic sector. A management buy-out involving six senior managers took place in 1994. The company subsequently expanded its capabilities through a German connection. PV Silicon AG was incorporated in Erfurt in 1997 as a specialist silicon-wafer producer, and Crystalox entered a strategic partnership with it in 1999. The relationship developed into a merger in 2002, resulting in the creation of PV Crystalox AG and combining Crystalox's process and equipment expertise with PV Silicon's wafer-manufacturing specialization. The group pursued greater vertical integration during the 2000s. In 2006, it decided to construct a silicon-production facility in Germany. Its operating model encompassed polysilicon production at Bitterfeld in Germany, the melting and crystallization of silicon into ingots at sites in the Abingdon area of the United Kingdom, and wafer conversion at its Erfurt facility. Additional wafer production was carried out through subcontractors in Japan. The resulting wafers were sold to photovoltaic-industry customers, which processed them into solar cells and incorporated those cells into modules. PV Crystalox Solar became a public company on the London Stock Exchange in June 2007. The flotation was intended to raise funds for in-house silicon production and to support further international expansion. From September 2007 through March 2010, the company was included in the FTSE 250 Index, placing it among the larger companies represented in that UK equity-market benchmark during that period. The brand's industrial positioning was therefore that of a specialized solar-materials supplier rather than a consumer-facing renewable-energy brand. Its value proposition rested on materials engineering, silicon purification, crystal growth, ingot production, and wafer processing. Publicly available reference material identifies operations in the United Kingdom, Germany, and Japan, but does not establish the company's current operating status, ownership, website, management team, or present product portfolio. Those fields remain unconfirmed in this dossier.
History
PV Crystalox Solar developed from Crystalox, a private limited company established in 1982 in Wantage, Oxfordshire. The original business specialized in equipment for purification and crystal growth across several technical-materials fields, including metals, alloys, semiconductors, and electro-optic materials. Its early identity was consequently that of a process-equipment and materials-technology company rather than a dedicated solar manufacturer. The strategic direction changed in 1990, when Crystalox began developing industrial production systems for the directional solidification of multicrystalline silicon. Directional solidification enabled silicon to be formed into multicrystalline blocks or ingots suitable for subsequent wafer slicing, and the work connected the company to the rapidly developing solar-cell industry. This move laid the foundation for the company's later role as a supplier of photovoltaic wafers. In 1994, six senior managers completed a management buy-out. Three years later, PV Silicon AG was incorporated in Erfurt, Germany. The German company specialized in silicon-wafer production, complementing Crystalox's process and crystal-growth capabilities. A strategic partnership between the two businesses began in 1999. The partnership ultimately progressed to a merger in 2002, when PV Crystalox AG was incorporated. The combination brought together technical production expertise and a dedicated wafer-manufacturing operation. The group continued to build an international and more vertically integrated production network. In 2006, management decided to construct a silicon-production plant in Bitterfeld, Germany. The operating chain described for the group included polysilicon production in Germany, melting and crystallization into silicon ingots at locations around Abingdon in the United Kingdom, and wafer conversion at the Erfurt facility. Production was also carried out through external subcontractors in Japan. This arrangement allowed the company to participate in several stages between silicon feedstock and the finished wafers purchased by photovoltaic cell manufacturers. PV Crystalox Solar made its London Stock Exchange debut in June 2007. The listing raised capital intended to support in-house silicon production and international business expansion. The company subsequently formed part of the FTSE 250 Index from September 2007 until March 2010. Its listed-company phase reflected the strong investment interest in photovoltaic manufacturing and silicon supply during that period. The company's products were not finished solar panels or consumer energy systems. Its wafers were sold to other photovoltaic companies, which converted them into solar cells, connected the cells into strings, and laminated them between glass and plastic layers to make durable modules. PV Crystalox Solar therefore occupied a specialized industrial position in the photovoltaic value chain, with its competitive identity tied to silicon processing, crystal growth, wafer quality, manufacturing scale, and supply relationships. The available reference material does not provide reliable information about later corporate events, current ownership, current executives, a confirmed official website, or whether the company remains active. The present-status field is consequently marked unknown rather than inferred from its historical listing or manufacturing footprint.
- 2010
End of FTSE 250 constituent period
[1]The company ceased to be a constituent of the FTSE 250 Index in March 2010 after having been included since September 2007.
- 2007
London Stock Exchange listing
[1]PV Crystalox Solar debuted on the London Stock Exchange in June to raise funds for in-house silicon production and international expansion.
- 2006
Decision to build German silicon plant
[1]The group decided to build a silicon-production plant in Bitterfeld, Germany, supporting a more integrated manufacturing model.
- 2002
Merger created PV Crystalox AG
[1]The Crystalox and PV Silicon relationship progressed to a merger and the incorporation of PV Crystalox AG.
- 1999
Strategic partnership with PV Silicon
[1]Crystalox and PV Silicon formed a strategic partnership that later developed into a corporate combination.
- 1997
PV Silicon AG incorporated in Germany
[1]PV Silicon AG was incorporated in Erfurt as a specialist silicon-wafer producer.
- 1994
Management buy-out
[1]Six senior managers completed a management buy-out of Crystalox.
- 1990
Entry into industrial multicrystalline silicon development
[1]The company began developing industrial production systems for directional solidification of multicrystalline silicon for solar-cell manufacturing.
- 1982
Crystalox established in Oxfordshire
[1]Crystalox was established as a private limited company in Wantage, Oxfordshire, initially focusing on equipment for purification and crystal growth of technical materials.
Products and positioning
Specialist upstream and midstream photovoltaic materials supplier focused on silicon purification, crystallization, ingot production, and multicrystalline wafer manufacturing.
Photovoltaic materials
Multicrystalline silicon wafers
Thin multicrystalline silicon wafers were the company's core commercial product. Photovoltaic cell manufacturers used them as semiconductor substrates, processing the wafers into solar cells before assembling those cells into modules. Production was associated with the company's German facility in Erfurt and with subcontracted manufacturing in Japan.
Silicon intermediate
Silicon ingots
The group produced silicon ingots by melting and crystallizing silicon at sites in the Abingdon area of the United Kingdom. These ingots served as intermediate forms that could be converted into wafers for photovoltaic applications.
Solar-grade silicon · 2006
Polysilicon production
PV Crystalox Solar's described production chain included polysilicon manufacture at Bitterfeld in Germany. This activity represented an upstream step in the supply of silicon used for photovoltaic wafer production and formed part of the group's effort to develop in-house silicon capability.
Brand decisions
2007
Public-market flotationOtherBackground
The company required capital to support in-house silicon production and to expand its international business.
Action taken
PV Crystalox Solar listed on the London Stock Exchange in June 2007.
Aftermath
The company became a publicly traded UK solar-materials supplier and was later included in the FTSE 250 Index until March 2010.
2006
Move toward in-house silicon productionStrategyBackground
The company sought to expand its role in the photovoltaic supply chain beyond wafer production.
Action taken
Management decided to build a silicon-production plant in Bitterfeld, Germany.
Aftermath
The planned facility became part of the group's vertically integrated manufacturing network, alongside UK ingot production and German and Japanese wafer conversion.
2002
Combination with PV SiliconM&ABackground
Crystalox had partnered with German wafer specialist PV Silicon since 1999, combining complementary expertise in silicon processing and wafer manufacture.
Action taken
The partnership progressed to a merger and the incorporation of PV Crystalox AG.
Aftermath
The combination created an integrated group with activities spanning silicon processing and photovoltaic wafer production.
Sources1 sources
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