Energizing the world since 2005
A large-scale, vertically integrated solar energy company — from monocrystalline cells and modules to complete solar systems and PV projects.
Established in 2005 in Shanghai, COTECH SOLAR designs, manufactures and distributes high-quality solar cells, modules and complete systems — and develops PV projects. 20 GW shipped to around 800 customers in 120+ countries.
A key subsidiary of COTECH SOLAR GROUP LIMITED, with annual module production capacity exceeding 1.2 GW, internationally advanced equipment and robust management systems.
Certified to ISO 9001:2015 and ISO 14001:2015, with product certifications including UL, TÜV, IEC, VDE and CE.
20 years of milestonesThe record so far
Two production bases, four branches and a Top-50 position among global PV module suppliers.
What sets COTECH apart
Vertical integration
A leading solar module manufacturer with an integrated chain across wafers, cells and modules — comprehensive solutions for the renewable energy industry.
International team
Professionals from over a dozen nations bring deep management and PV industry experience.
Research & development
Continuous innovation in cell, module and system-integration technology, with several high-tech products holding independent IP rights.
Strict quality control
Validated by UL, TÜV, IEC, VDE and CE, plus ISO 9001 quality and ISO 14001 environmental management.
Support that
outlasts the sale
Expert support from installation to troubleshooting, proactive maintenance guidance, and industry-leading warranties behind every product.
15-year product warranty and 30-year linear power warranty on TOPCon, HJT and back-contact dual-glass modules — at least 87% output at year 30.
10-year warranty on residential ESS; 5-year product plus capacity LTSA on container systems.
Up to 25-year structural warranty, with project structural calculation provided.
Pumps, lights, fans and robots: 2 – 5 years by product line.
ISO 9001 · ISO 14001 · TÜV · UL · IEC · VDE · CE
Quality and environmental management certified; product certifications by line — see each datasheet for the applicable marks.