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Inverters supply reactive power
Photovoltaic systems require an inverter. This converts the direct current generated by solar modules into alternating current. The power can then be fed into the public grid. If inverters also supply reactive power in addition to active power, they can stabilise the power grid by compensating for minor voltage fluctuations in the grid. This function is increasingly demanded by network operators. Active power describes the proportion of electrical power that can be converted into other forms of power, such as mechanical power.