DelSolar
Corporate brand
UnclaimedDelSolar is a Taiwan-based solar-energy company associated with Delta Electronics, producing photovoltaic cells and modules and developing photovoltaic systems.
Last updated August 31, 2026
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Overview
DelSolar is a Taiwanese photovoltaic company established in 2004 through an alliance between Delta Electronics and the Industrial Technology Research Institute (ITRI), a Taiwan-based applied-research organization supervised by the Ministry of Economic Affairs. Its name combines “Delta,” referring to its parent group, with “solar,” reflecting the company’s principal business. DelSolar’s activities have covered research, design, manufacturing and distribution of solar cells and solar modules, together with photovoltaic-system development and installation. The company began producing solar cells in 2005, initially with a reported annual capacity of 25 megawatts. It entered module production in 2009, when it introduced a first series with output of up to 230 watts. The company’s manufacturing footprint subsequently expanded beyond its original Hsinchu base. Facilities were associated with Hsinchu and Jhunan in Taiwan and Wujiang in China, while representative operations were described in Taiwan, China, the United States and the Netherlands. By the end of 2010, DelSolar was reported to have 11 production lines and aggregate capacity of 436 megawatts. Its Wujiang operation later reached a reported module capacity of 1 gigawatt in 2013. DelSolar also pursued corporate and project-scale photovoltaic installations. Its project references included a 1-megawatt system at the World Games Stadium in Kaohsiung, a 120-kilowatt rooftop system at River of Life Christian Church in California, a photovoltaic installation at the company’s Wujiang plant, and larger or planned projects at the Taichung power plant in Taiwan, Caserta in Italy and Vrapice in the Czech Republic. These installations illustrated the company’s attempt to combine component manufacturing with complete photovoltaic-system development. The business supplied both monocrystalline and polycrystalline silicon cells and modules. Its documented cell portfolio included six-inch formats using two- or three-busbar designs, with wafer thicknesses in the 180-to-200-micrometer range. Its module portfolio included conventional monocrystalline and polycrystalline products as well as black modules. DelSolar described positive power tolerances of up to plus 3 percent for some modules, positioning them around predictable system output and energy yield. DelSolar was listed on Taiwan’s Emerging Stock Board in 2007 and reported substantial international exposure during its expansion period. In 2009, the company reported shipments of 90.8 megawatts and revenue of approximately US$135 million; those figures belong to the 2009 reporting period and should not be treated as current performance. Europe accounted for roughly 60 percent of sales at that time, and the company also began developing its module business in the United States. The available reference material documents DelSolar primarily as a solar-cell, solar-module and photovoltaic-system business within the Delta group. It does not establish a current standalone website, present executive roster, current listing status, or definitive operating status. Those details therefore remain unconfirmed in this entry.
History
DelSolar was created in 2004 through cooperation between Delta Electronics and Taiwan's Industrial Technology Research Institute. The partnership connected Delta's industrial and electronics capabilities with ITRI's applied research base and was intended to establish a Taiwan-based business focused on photovoltaic technology. The brand name joined “Delta” and “solar,” directly expressing both its corporate affiliation and industrial focus. Initial solar-cell production began in 2005. The company was reported to have started with capacity of 25 megawatts and developed products based on monocrystalline and polycrystalline silicon technologies. Its cell products included six-inch formats, two- and three-busbar configurations, and wafers approximately 180 to 200 micrometers thick. DelSolar subsequently expanded from cell manufacturing into module production. In 2009 it introduced its first solar-module series, with reported output of up to 230 watts. This broadened the company from an upstream component supplier into a provider of finished photovoltaic modules. DelSolar reached Taiwan's Emerging Stock Board in 2007. During its expansion period, the company developed a manufacturing network associated with Hsinchu and Jhunan in Taiwan and Wujiang in China. The company reported 11 production lines and total capacity of 436 megawatts by the end of 2010. A Jhunan plant announced in 2010 was completed and began mass production in the second quarter of 2011, with plans described as capable of taking solar-cell production toward 3 gigawatts. A second plant, intended primarily for modules, was expected to be completed by the end of 2012. The Hsinchu and Wujiang facilities were described as having module capacities of 45 and 70 megawatts respectively at one stage, while the Wujiang site was later reported to have reached 1 gigawatt of total module capacity in 2013. The company's commercial development was international. In 2009, DelSolar reported shipments of 90.8 megawatts and approximately US$135 million in revenue for that year. About 60 percent of sales were attributed to Europe, and the company began building a module business in the United States. Because these figures are historical, they do not describe present financial performance. Alongside component manufacturing, DelSolar developed and supplied photovoltaic systems. Its documented projects included a 1-megawatt installation at the World Games Stadium in Kaohsiung, a 120-kilowatt rooftop system at River of Life Christian Church in California, a 115-kilowatt system at the Wujiang plant, and projects associated with the Taichung power plant, Caserta in Italy and Vrapice in the Czech Republic. The Wujiang installation combined standard modules with light-through building-integrated photovoltaic modules, demonstrating the brand's interest in applications beyond conventional roof-mounted arrays. DelSolar's module range included monocrystalline, polycrystalline and black modules. The company promoted positive power tolerances of as much as 3 percent for its modules, emphasizing stable and higher system output. The available reference material identifies DelSolar as a Delta Group subsidiary, but does not provide reliable current information on its standalone corporate status, leadership, website or continuing operations. Those matters require further verification.
- 2013
Wujiang module capacity reached reported 1-gigawatt level
[1]The Wujiang plant was reported to have reached total solar-module capacity of 1 gigawatt.
- 2011
Jhunan plant began mass production
[1]The Jhunan facility was reported to have been completed and to have begun mass production in the second quarter.
- 2010
Jhunan plant expansion announced
[1]DelSolar announced a Jhunan plant ceremony and expansion plan intended to support future high-volume solar-cell production.
- 2009
First solar-module series launched
[1]DelSolar launched its first solar-module series, with reported output of up to 230 watts.
- 2008
Kaohsiung World Games Stadium photovoltaic system completed
[1]A 1-megawatt photovoltaic system using 8,844 solar panels was completed at the World Games Stadium in Kaohsiung.
- 2007
Emerging Stock Board listing
[1]The company was listed on Taiwan's Emerging Stock Board under ticker 3599.
- 2005
Initial solar-cell production
[1]DelSolar began producing solar cells, initially with reported capacity of 25 megawatts.
- 2004
Company founded through Delta–ITRI alliance
[1]DelSolar was established through an alliance between Delta Electronics and the Industrial Technology Research Institute in Taiwan.
Products and positioning
A vertically oriented photovoltaic brand combining solar-cell and module manufacturing with photovoltaic-system development, backed by the technology and industrial resources of Delta Electronics.
Solar cells
Monocrystalline silicon solar cells
DelSolar's monocrystalline cell products formed part of its silicon-based photovoltaic portfolio. The documented range included six-inch cells and two- or three-busbar configurations, with wafer thicknesses of approximately 180 to 200 micrometers.
Solar cells
Polycrystalline silicon solar cells
Polycrystalline silicon cells were another core product family. They supported DelSolar's role as a photovoltaic component supplier before and alongside its expansion into finished solar modules.
Photovoltaic modules · 2009
Monocrystalline and polycrystalline solar modules
DelSolar produced finished modules using both monocrystalline and polycrystalline silicon technologies. Its first module series, introduced in 2009, was reported to offer output of up to 230 watts. The company emphasized positive power tolerance of up to 3 percent for certain products.
Photovoltaic modules
Black modules
Black photovoltaic modules were included in DelSolar's module portfolio, providing an appearance-oriented alternative to conventional module designs for architectural and rooftop applications.
Building-integrated photovoltaics
Building-integrated photovoltaic modules
DelSolar supplied light-through building-integrated photovoltaic modules for at least one documented installation at its Wujiang plant. These products integrated electricity generation with architectural surfaces rather than relying exclusively on opaque conventional panels.
Photovoltaic systems
Photovoltaic systems
Beyond cells and modules, DelSolar developed photovoltaic systems for stadiums, commercial rooftops, industrial sites and utility-scale applications. Documented projects ranged from small rooftop systems to installations measured in megawatts.
Brand decisions
2010
Manufacturing-capacity expansion centered on JhunanStrategyBackground
DelSolar was expanding production capacity as photovoltaic demand and international sales developed.
Action taken
The company announced the Jhunan plant and described an expansion plan capable of supporting substantially greater solar-cell output.
Aftermath
The plant was reported to have entered mass production in the second quarter of 2011; a further module-oriented plant was planned for completion by the end of 2012.
2009
Entry into photovoltaic-module productionProduct launchBackground
After beginning solar-cell production in 2005, DelSolar sought to expand into downstream photovoltaic products.
Action taken
The company launched its first solar-module series, reported at up to 230 watts per module.
Aftermath
The move broadened DelSolar's offering from solar cells to finished modules and supported its subsequent photovoltaic-system activities.
Sources1 sources
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