Why do many thermoelectric generator systems need a power conditioner?

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thermoelectric power generator Components of a thermoelectric generator.

In many thermoelectric power generator systems, a power conditioner is required to convert the generator's electrical output into a usable voltage.1

While these devices generate direct current (DC) by maintaining a temperature differential across semiconductor materials, the raw output may not match the specific voltage requirements of the intended electrical equipment or load. The power conditioner serves as an essential interface to regulate and transform this output, ensuring that the energy provided is compatible with the device being powered.213