WEIQI ELECTRIC
Relay Applications in Photovoltaic Power Generation
2025-07-03
In recent years, the solar power industry has seen significant shifts in demand, particularly as the need to mitigate risks from natural disasters has become increasingly urgent. When facing challenges posed by harsh natural conditions such as earthquakes and floods, solar power systems must demonstrate exceptional stability and reliability to ensure a continuous, uninterrupted supply of electricity.
Therefore, power companies need to adopt a more comprehensive and robust energy supply strategy, gradually shifting from the traditional centralized model to a more flexible, efficient, and adaptable distributed approach. Naturally, this also places higher demands on electronic components—relays are no exception.
First, let’s examine the challenges we’re currently facing. Today, global electricity demand is steadily rising, and solar power systems—being among the most environmentally friendly and renewable energy sources—have emerged as a crucial solution to meet this growing energy need.
However, given the frequent occurrence of natural disasters such as earthquakes and floods across multiple countries and regions, enhancing the stability of solar equipment and reducing its failure rates has become particularly critical. Only in this way can we effectively prevent the severe consequences that arise from power-generation outages. Moreover, as electricity demand continues to rise year after year, improving the power-generating capacity of individual devices and machines has also emerged as an urgent challenge that needs immediate attention.
There are two main ways to improve equipment performance. On one hand, adopting high-capacity, high-current configurations can significantly boost power generation efficiency. On the other hand, pursuing miniaturization and lightweight design strategies can help reduce equipment investment costs. These innovative technological approaches have injected fresh energy and vitality into the solar power market.
Although the existing measures have already yielded significant results, several challenging issues still require further research and discussion. As devices continue to evolve rapidly toward miniaturization and higher capacity, the heat generated within the devices themselves has become an increasingly prominent concern. This is because internal thermal energy often leads to energy losses, ultimately impacting the lifespan of the equipment.
How to effectively manage internal device temperatures—preventing energy loss and extending service life—is a critical issue that urgently needs to be addressed in the field of photovoltaic power generation today.
The barrier to miniaturization and higher capacity development is heat generation inside the device. When capacity increases, causing current to double, heat output actually quadruples. This overheating can lead to operational malfunctions or significantly shorten the lifespan of the circuit board. As a result, relays handling large currents in the 200A range often require cooling mechanisms such as fans or heat sinks—measures that, unfortunately, tend to make the devices themselves bulkier and more cumbersome.
In response to this challenge, relay manufacturers have developed a high-capacity power relay—G9KA. Featuring an ultra-low contact resistance of just 0.2 mΩ, the G9KA minimizes heat loss and is perfectly suited for high-capacity applications. This innovative design effectively addresses the critical issue of heat generation, which remains a major hurdle in achieving miniaturization and higher capacity. Additionally, compared to contactors with equivalent current ratings, the G9KA boasts a remarkably compact size—approximately one-third that of its counterparts—making it an ideal solution for reducing device bulk and optimizing space efficiency.
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2025-07-03
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