A solar charge controller can be adapted to accept output from 16 piezo transducers, specifically 20mm buzzer-type disk piezo elements. However, it is important to note that solar charge controllers operate with direct current (DC) and that the power output from a single piezo transducer is minimal. To achieve power levels comparable to a solar panel, tens of thousands of piezo transducers may be necessary. For further information on energy harvesting, the Wikipedia article on the topic provides insights into piezoelectricity and other methods. Understanding these limitations is crucial for effective implementation.