Risen Energy has released a technical white paper for the Jäger high-efficiency mono-crystalline Half-cut Module series, which have captured much attention since the end of last year.
The white paper deciphers the new product’s innovative technology and also makes a well-rounded introduction to Jäger series product type, features, advantages and power roadmap.
Jäger series were born in response to some of the key industrial pains and customer concerns: how to reduce LID（Light-induced Degradation), LeTID (Light and elevated Temperature Induced Degradation), internal loss, shadow shading and BOS cost.
As a new generation of high performance, high cost-effective and reliable products, Jäger series have a total of four types of products: RSM120、RSM132、RSM144and RSM156, of which the highest module conversion efficiency can reach up to 20.6% and the highest power output can reach up to 440Wp.
Jäger Series 4 types of Modules
Jäger high-efficiency mono-crystalline cells deploy the world leading two-side-stack-passivation technology, SE (Selective Emitter) technology, low-temperature firing technology and enhanced current injection technology, which can increase the cell conversion efficiency and at the same time reduce LID and LeTID. Jäger cell conversion efficiency can reach up to 22.51%， with the efficiency of mainstream bin between 22.1% and 22.2%.
The reduction of module inner power loss can efficiently increase the module actual power output. This loss is caused by several negative factors such as the light reflection loss, the conductor/cable resistance loss, and the inter-electrical connection loss and so on.
To decrease these negative affections, various methods have been researched and used in PV industry, Jäger series products also use some advanced methods to decrease this inner loss. The Half-cut cell technology is one of the methods which can decrease the inner electrical connection loss. This kind of Half-Cut design not only improves the power output of the module, but also effectively reduces the adverse effects of shadow shading to the minimum.
At the same time, the working temperature of the Half-cut Cell module is 2 to 3 ℃ lower than that of the Full cell module due to the reduction of the current. In the case of shading, the highest temperature of the module is about 20 ℃ lower than that of the Full cell module, which greatly improves the stability of power output and the long-term reliability of the module.
As a cost-effective product, the application of Jäger products can effectively reduce the BOS cost of PV system. The BOS cost of a 50 MWp ground-mounted power plant is simulated and compared by Risen Energy engineers and technicians in the White Paper, using the 335 Wp module and Jäger 400Wp module.
The results show that the use of high power modules can reduce the quantity of modules, giving rise to the reduction of construction and installation costs of ground piles, brackets, DC cables, shunt boxes and photovoltaic field areas.
Not all Half-cut Modules are called Jäger. Jäger series of high-efficiency Mono-crystalline Half-cut modules can be described as “half” work but “double” efficiency.