Which is more powerful, a 24-volt DC motor or a 10-watt motor?

Question:I'm comparing two makes of solar-powered attic vents. One lists the motor power in volts, the other in watts.

Answers:
There really isn't enough information to make a comparison. You really need to know the horsepower (HP) of the motor to determine it's power.

Amperage would be a good indication as well, but you need to know both the voltage and wattage to calculate the amperage.