fan works great --the fan can handle over 20+v...the belt driven gens put out way more power than this setup..but i think it looks kinda cool...grandkids have a blast on it...they like the big sparks it throws out..when you short or drag the output wires togeather...does give you kinda of a jolt when your touching both wires..so i have to keep a close watch on them....i toss one on the back of my motorhome..saved me a few times..about 5 to 8 min. of charging gives me enough power to start....i was kinda surprized it didnt cog more than what it does..with steel flat bar in the coil holes--mounted to a steel ring...spins right around with ease..when theirs no load... as a hobby its been fun and agravating at times.................................