Voltage output from wind turbine?

captlee

I have a wind turbine. light winds here are the norm during the summer if i am not getting the full 300 rpms or 12 volts from the generator will I get any usable voltage to the battery's perhaps say 6 volts?

Q2 how much voltage loss will have if I use a 100 ft 12 gauge cable from the generator to the batter bank.?

BB.

Re: Voltage output from wind turbine?

The problem is not just the voltage--It is Power = Voltage * Current = abc Watts

It is very difficult for any wind turbine to output much energy in less than ~7-8 MPH... There just is not much energy in that little wind.

You can put much longer blades on the turbine to get more "swept area"--But that will cause more issues in high wind (turbine "runs away", over heats, brake fails, bearings/structure fails, etc.).

Wind goes at the "Cube of the velocity":

7mph^3 = 343
12mph^3 = 1,728
1,728/343 = 5 times more energy in 12 mph vs 7 mph wind...

You can use a voltage drop calculator... Say you want 5 amps over 100 feet (one way wire run) @ 12 gauge wire. The calculator shows a 1.9 volt drop...

If you have a 14.5 volt battery + 1.9 volt wiring drop = 16.4 volts at the rectifier block in turbine. Power = 5 amps * 14.5 volts = 72.5 watts of "useful" energy into the battery bank.

-Bill

bill von novak

Re: Voltage output from wind turbine?

captlee wrote: »

I have a wind turbine. light winds here are the norm during the summer if i am not getting the full 300 rpms or 12 volts from the generator will I get any usable voltage to the battery's perhaps say 6 volts?

You will not get any usable _power._ If your turbine is rated for (say) 500 watts at 12mph wind, at 6mph you would get 8 watts. Power goes by the cube of wind speed.