Photovoltaic Equipment Supervision-NOA Testing & Certification Group

Photovoltaic Equipment Supervision

As one of the most critical components of a photovoltaic power station, the quality of photovoltaic modules directly affects the station's power generation performance. During the construction of photovoltaic power stations, due to the large quantity of photovoltaic module equipment, susceptibility to damage and failure, and various environmental factors such as weather, it is necessary to perform full-process monitoring of module quality during production, delivery to the site, and installation. Photovoltaic projects typically have short construction cycles and require high-quality products to be provided in a short period. If the production line conditions do not meet the requirements, it can lead to a dilemma between quality and supply progress, impacting the overall operation of the power station. To ensure the stability and reliability of module equipment during later operation, a comprehensive tracking system for photovoltaic module supervision, delivery, and installation inspections has been established.

NOA provides comprehensive supervision services to ensure the safety and reliability of photovoltaic equipment production for its customers. By adopting a method involving full-time supervision at the factory, the supervising engineers oversee the entire process of equipment production, starting from raw material preparation and equipment fabrication to complete equipment packaging and shipment. The supervision primarily includes two main aspects: first, control over equipment production progress (mainly involving planning/implementation and analysis, improvement, and tracking in case of substandard equipment output); second, control over equipment production quality (including daily data collection/summation, analysis, improvement, and tracking of anomalies, daily initial inspections, quality process control, sampling inspection according to national standards, and shipment management)

Service Content

I.Factory Audit
Quality system, management manual, product equipment, production equipment, manufacturer of testing equipment, measurement, etc

II.Document Review
Management system, CDF documents

III.Raw Material Verification
Quality control of material components

IV.Process and Production Line Inspection
Quality monitoring of critical production processes during the manufacturing process

V.Finished Product Inspection
Performance testing, equipment consistency, outgoing inspection, etc

VI.Third-Party Laboratory Rechecking

VII.Supervision of Packing and Shipment

Service Process

1.Business Consultation
2.Providing Product Technical Specifications and Production Schedule
3.Contract Signing
4.Engineer On-Site Supervision
5.Daily Issuance of Supervision Logs
6.Issuance of Supervision Reports

Q&A

The photovoltaic power station system consists of multiple components such as photovoltaic modules, inverters, combiner boxes, brackets, etc. If there is a problem in any one of these links, it will affect the operation of the power station. This could lead to minor issues like reduced power generation or, in severe cases, reset everything by causing a fire.

What is the principle of power generation for photovoltaic modules?

Photovoltaic power generation is a technology that directly converts solar energy into electrical energy using the photovoltaic effect at the interface of semiconductors. The key component of this technology is the solar cell. Solar cells, when connected in series and encapsulated for protection, form large-area solar modules. When combined with components like power controllers, they constitute a photovoltaic power generation system.

What is the basic structure of photovoltaic modules?

(1) Solar cell - Its main function is to generate electricity;

(2) Tabbing ribbon - Its main function is to collect and channel the electricity generated by the solar cells to the junction box;

(3) EVA (Ethylene Vinyl Acetate) - Its main function is to bond and fix tempered glass and the main electricity-generating body, encapsulating the main electricity-generating body and the backsheet;

(4) Tempered glass - Its role is to protect the main electricity-generating body (solar cells);

(5) Backsheet - Its role is to seal, insulate, and waterproof (usually made of materials like TPT, TPE, which must be resistant to aging);

(6) Aluminum alloy frame - It acts as a protective compression part, providing certain sealing and support, enhancing mechanical strength;

(7) Junction box - It protects the entire power generation system and serves as a current transfer station;

(8) Silicone - Used to seal the junction between the module and the aluminum alloy frame, and the junction between the module and the junction box.

What are the main quality risk points of photovoltaic modules?

The main quality risk point is latent cracks:

(1) Latent cracks may lead to hot spot effects;

(2) They can accelerate the power attenuation of solar cells;

(3) They can affect the normal service life of the module;

(4) Under mechanical loads, they can expand and potentially cause open-circuit damage.

Other quality risk points include: virtual soldering, busbar breaks, light and dark areas, scratches on solar cells, and dark spots.

What are the quality control points for auxiliary materials during the module manufacturing process?

Main raw and auxiliary materials:

(1) Glass: dimensional accuracy, light transmittance, tempering, impact resistance, appearance;

(2) EVA (Ethylene Vinyl Acetate): dimensional accuracy, shrinkage rate, cross-linking degree, light transmittance after cross-linking, appearance;

(3) Backsheet: dimensional accuracy, interlayer peel strength, appearance;

(4) Busbars & Ribbon: dimensional accuracy, resistivity, elongation, coating melting temperature, tensile strength, appearance;

(5) Junction Box: adhesive strength to the backsheet, connection strength between leads and casing, high/low-temperature mechanical stability, appearance;

(6) Potting compound for junction box, sealing silicone: appearance, surface drying time, curing time, elongation at break;

(7) Aluminum frame: Vickers hardness, dimensions, riveting static load, appearance.

Our Advantage

Authoritative Qualification

NOA has been approved by Certification and Accreditation Administration of the People’s Republic of China（CNCA）(CNCA-R-2002-051), and has obtained qualification of China Inspection Body and Laboratory Mandatory Approval (CMA),and has passed the multiple approvals of China National Accreditation Service for Conformity Assessment (CNAS), International Accreditation Service (IAS), United Kingdom Accreditation Service (UKAS), Joint Accreditation System of Australia and New Zealand (JAS-ANZ). NOA has been approved by State Administration for Market Regulation of China, and has been recognized as inspection and testing institution of China's special equipment, as well as the qualification of China's national equipment supervision and engineering supervision. NOA-DCI is the notified body of the CE directive of the European Commission. NOA has been recognized by the International Electrotechnical Commission (IECQ) by obtaining Electronic Component Quality Assessment System. It is also a national inspection and assessment notified body of import and export commodity in China.NOA is a high-tech enterprise in Shanghai.

Improve Performance, Realize Asset Value Appreciation, and Service Throughout the Entire Value Chain

From pre-design to post-operation, NOA has the ability to guarantee the whole life cycle of the business. NOA, as an independent third-party inspection company, has a large number of domestic and international standards and specifications proficient in design, welding, non-destructive testing, painting, packaging and other fields The experienced team of professional engineers and inspection experts, with more than ten years of experience in the domestic market, is familiar with all aspects of the domestic industrial equipment supply chain, and can provide you with technical support services for the full life cycle of technical services in a timely manner, combining various products. Inspection, certification, testing, consulting, and auditing services can provide you with one-stop all-round comprehensive services.

Quality, Efficiency and Service

NOA has formed a mature and solid operation system in the development of more than 20 years. We let technical experts who are familiar with market regulations and testing standards and have professional industry experience to carry out inspection, evaluation and design review work. While meeting the requirements of domestic and international standards, we ensure that customers can obtain satisfactory service results in the first time with accurate time-sensitive management methods, and ensure that customers can seize the opportunity in the market competition.

Service Area

NOA inspection services currently cover Europe, Australia, Russia, some Middle East regions and most regions in China. NOA can ensure the consistency and continuity of customer service in different regions, and eliminate the impact of unfamiliar environments on customer quality. The guarantees and the impact of project implementation enable customers to participate in different markets across the country or around the world with flawless quality.

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