Low Current Represents the Best Choice for PV Modules

By Jinko Solar
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Guangzhou Development New Energy Co., Ltd. recently began the bidding process for procurement of PV modules for 2021 and 2022. The procurement process is divided into two bidding sections with a total procurement scale of 1.08GW. The power threshold for the PV modules in the two bidding sections is set in advance, with module current not to exceed 15A, illustrating that system safety and high power are equally important. Limiting the current level of modules can effectively improve a project’s economic efficiency, also providing a strong guarantee of system safety and compatibility.

Low Current Leads to Low Cable Loss

In terms of economic efficiency of a project, module power generation is the biggest factor affecting LCOE. There is a trade-off between the selection of cables for high-current modules and the loss of power generation caused by high-current and how to find the best balance between these two options has become an issue generating widespread concern in the industry. Take JinkoSolar Tiger Pro as an example:

It can be seen that, if the same cable is selected, the higher the module current, the greater the cable loss. If a thicker cable is used to reduce cable loss, costs will increase.

Low Current Ensures Module Safety

In terms of current safety, the Tiger Pro module does not need to upgrade current protection, and there is therefore no need to increase costs by adding extra devices.

It can be seen that higher currents require protection devices of higher specifications to ensure module safety. The Tiger Pro module can not only ensure greater safety, but can also reduce the cost of such additional protection devices.

JinkoSolar is committed to continuously improving module safety. The JinkoSolar R&D team focuses on solving industry problems and actively promotes the quality of its R&D work. Through simulation analysis, product prototype verification, manufacturing process development and reliability verification, the company has launched a 30A high-current module split junction box, to ensure stable and reliable operation in a high-current environment. The company has applied for a national patent for the junction box, with the aim of enabling JinkoSolar Tiger Pro modules to become mature and high-quality products in the global PV manufacturing industry.

The data of an actual power plant project shows that the greater the current of a PV module, the more demanding the level of safety of the PV junction box becomes. The junction box connected with Tiger Pro modules has already fully taken into account the safety perspective, to the point where the 30A high-current module split junction box can achieve a 25% safety margin, leaving enough space for future applications such as battery efficiency improvement or new efficiency enhancement technologies.

Low Current Enables Global Deployment

In terms of compatibility of Tiger Pro modules with inverters, the maximum input current for mainstream inverters on the market has been upgraded to 15A, which can be fully compatible with Tiger Pro to ensure no “power brownouts” during the power generation conversion process from DC to AC. It also ensures high quality and stability of the alternating current that can be transmitted to the grid. Mainstream inverters compatible with the Tiger Pro series are already in mass production and the combination of inverter and module has been successfully deployed worldwide over the past year.

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