The TLG-500
12 volt output chart

The chart below is based off of customer data, not TLG. 
It cannot be used to compare output from this turbine to another.  Please keep in mind that many factors effect output results such as length of wire, size of wire, battery bank size (amp hours), and more so the output depends on how drained or how charged your batteries are.
Wind generators charge a battery in the same manor as your battery charger in your garage does.  A drained battery pulls mores amperage at the beginning of the charge than it does when it is almost full and that is the reason this chart cannot be used for turbine comparison.

By no means does this chart reflect the highest reported output for this model, it only shows the state of charge of this customers battery bank.

Many customers report much higher output than what is shown here, but this chart does provide an honest representation of the least amounts of output you should see.

12 Volt Battery Bank Environment
Volts x Amps = Watts

Wind Speed MPH +/- 2 Amps into Battery Bank +/- 1.0 Battery Voltage +/- 1  Average Watts
5 MPH 1 Amp 12 Volts 12 Watts
8 MPH 2.5 Amps 12 Volts 30 Watts
9 MPH 3 Amps 12 Volts 36 Watts
11 MPH 4 Amps 12.5 Volts 50 Watts
12 MPH 5 Amps 13 Volts 65 Watts
18 MPH 10 Amps 13.5 Volts 135 Watts
24 MPH 15 Amps 13.7 Volts 205 Watts
28 MPH 20 Amps 14 Volts 280 Watts
30 MPH 25 Amps 14.4 Volts 360 Watts
34 MPH 30 Amps 14.7 Volts 441 Watts
38 MPH 35 Amps 14.8 Volts 518 Watts
45 MPH 40 Amps 14.8 Volts 592 Watts
50 MPH 50 Amps 14.8 Volts 740 Watts

In the graph below you can see the furling effect on the output.
Without the furl the output would continue on upwards.

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