Solar Panel not heating heat 30 AWG SS304 Wire
THe maximum power will be about 80% of the short circuit current and 80% of the open circuit voltage, ( more or less) at whatever ratio of resistance that works out to be.  Since motor resistance (DCR) starts at 10% of full power impedance, its a poor match without a battery. An impedance matching MPPT optimizes the charge current according to input solar power by tracking or some other algorithm based on Voc and/or Isc.

Consider solar power as a current source, limited by some Voc voltage just the opposite of a zener which acts like a voltage sink. Both have a knee in their curve and ideal for PV is 72% to 82%Voc  from morning to mid-day full direct sun, with some variations for PV chemistry etc.

Looks like a smoggy day or overcast at least. Try a battery like with a Schottky diode to protect the PV so you can run 3 White Power LEDs in series with a series R or  LM317 current limiter at night.  WHite LEDs are like 3V zeners. The higher the power rating, the lower the Zzt where Zzt or ESR ~1/Pd rated.