How can the inverter manage high-temperature conditions effectively

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As the scorching summer approaches, it’s common for users to assume that the intense sunlight will lead to higher power generation in photovoltaic power stations. However, the reality is more nuanced. The power output of a photovoltaic system depends on various factors, with irradiance and ambient temperature being among the most crucial. While summer brings soaring temperatures, it doesn’t necessarily translate to increased irradiance.

Solar modules exhibit a negative temperature coefficient, meaning their power generation efficiency decreases as temperatures rise. Consequently, the peak power output of photovoltaic systems often occurs during periods of moderate temperatures, such as late spring or early autumn, when both irradiance and ambient temperatures are favorable.

Moreover, the inverter, typically installed outdoors and exposed to direct sunlight, experiences a rise in internal temperature during hot summer days. This heat buildup can lead to over-temperature conditions, compromising load protection and ultimately impacting the performance of the power station. Thus, the heat dissipation capability of the inverter becomes crucial, affecting both power generation efficiency and longevity. So how should the inverter cope with high temperature weather.

How high temperature affects inverter’s performance

Efficiency Reduction: Solar inverters typically have a temperature derating curve, meaning their efficiency decreases as temperatures rise. This reduction in efficiency is due to increased internal resistance within the components, resulting in higher power losses and decreased conversion efficiency.

Power Output Limitation: To prevent damage to internal components, solar inverters may reduce their power output as temperatures increase. This temperature-induced derating limits the maximum power that the inverter can deliver, potentially reducing overall energy production

Component Degradation: Prolonged exposure to high temperatures can lead to the degradation of electronic components within the inverter. This degradation can include decreased performance, increased failure rates, and shortened lifespan of critical components such as capacitors, semiconductors, and power electronics.

Reduced Lifespan: High temperatures accelerate the aging process of electronic components, leading to a shorter lifespan for the solar inverter. Components may degrade more quickly under prolonged exposure to elevated temperatures, resulting in increased maintenance costs and earlier replacement.

How should the inverter cope with high temperature

First of all, Ensure proper air circulation around the inverter by avoiding installation in confined spaces. Maintain adequate spacing between multiple inverters on the same plane to facilitate ventilation, heat dissipation, and ease of maintenance.

Additionally, while the inverter’s protection level may be IP66 or IP65 , protecting the inverter from wind, sun, and rain can extend the service life of the inverter. Choosing to install it at the bottom of the module or under the eaves. On the roof of the color steel tile, it is recommended to install an awning for the inverter, which can not only provide shelter from wind and rain, but also reduce direct sunlight, lower the temperature of the inverter, avoid load reduction due to overheating of the inverter, and ensure power generation efficiency.

After the installation of the inverter, diligent attention to subsequent maintenance is essential. Regular cleaning of the fan, fan cover, or heat sink is necessary to ensure efficient heat dissipation and cooling. The inverter employs intelligent air-cooling technology, wherein the fan adjusts its speed intelligently based on internal temperature fluctuations. This feature proves invaluable in high-temperature environments, effectively minimizing the risk of load shedding and promoting stable operation. Furthermore, it contributes to prolonging the fan’s service life.

Moreover, the inverter incorporates a fan fault alarm function. This feature notifies operation and maintenance personnel of any issues via the monitoring background,enabling swift and accurate fault localization. Such prompt identification facilitates timely intervention by maintenance personnel, minimizing power generation losses and safeguarding revenue from power generation.

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