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Calculate the motor efficiency.

Calculate the generator efficiency.

Calculate overall efficiency.

Ok soo I went forward and did this.

Since 1hp = 745.7Watt I assumed that the motor would be going at 2x745.7W = 1491.4W .

So if you take the P = I.V and you insert 15A.120V = 1800W

So using n = Po/Pin for Efficiency 1491.4/1800 *100 = 82.85% efficiency.

Not sure if this is correct but now?

I can say P = I^2 / R and get the Watt but to what comparison? Which Po and which Pin ??

Please help