Surprised to find my diy solar panel driving bigger geared motor for solar 4

I was stumped in finding the right relays and power source for my solar oven tracker. My diy solar panels are 1.5v, 3.5 amps so a higher voltage is needed for the relays to work. I had a bigger 12 volt geared motor on hand which I had used as a wind turbine. I hooked the dc motor to the 1.5v solar panel and was surprised to see it turning the motor. This discovery means that I might not have to use relays and an external power source for the tracker. The model solar tracker works with 2 solar panels with one set of the terminals wired normally to the motor and the other set wired with the polarity reversed. Click on the link below to see the model tracker I made in pt 3.
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