Evolution of Solar Inverter Cooling System: From Air Cooling to
The leap in power density and the game of thermal boundaries are driving the four revolutions in solar inverter cooling technology.
In order to provide grid services, inverters need to have sources of power that they can control. This could be either generation, such as a solar panel that is currently producing electricity, or storage, like a battery system that can be used to provide power that was previously stored.
Inverters with active cooling technology have a clear advantage here, especially in the higher temperature ranges. Since the inverters are significantly cooler inside, they only start to reduce their output power at higher ambient temperatures. This has a positive effect on the yield.
The result is a highly efficient cooling system consisting of a heat sink and a fan that optimally cools the power electronic components inside the inverter. The heart of the cooling system is an innovative fan housing, which is integrated into a recess of a die-cast aluminium heat sink with specially arranged cooling fins.
Modern inverters can both provide and absorb reactive power to help grids balance this important resource. In addition, because reactive power is difficult to transport long distances, distributed energy resources like rooftop solar are especially useful sources of reactive power.
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