Why the electric motor does not rotate: voltage

Measure the maximum voltage generated by the solar panel and compare it to the voltage required to run the electric motor.

What are we dealing with here

So, our solar panel does not start the electric motor under room conditions. Why?

The physicist's way of dealing with the matter is to study the physical quantities that are important in the given context. In the case of electrical equipment, as the electric motor undoubtedly is, the voltage and current should be measured in the first place.

We're dealing with tension here. We measure the voltage at the terminals of both the solar panel and the battery. In addition, let's check if the electric motor still spins at low voltage. Then we try to analyze the results.

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We measure the voltage at the terminals of the solar panel and the battery

Measurement results

Voltage at the terminals of my solar panel		$V$
Voltage at my battery terminals		$V$

Let's try if the electric motor works with a lower voltage than the battery gives it

What happens to a 1.5V battery when it "runs flat"? Do an experiment to test your hypothesis.