If I wasn't such a lazy ass I would do the exact calculations on how much power it takes to compress 650 CFM of air to about 5 PSI.

If my memory serves me correctly I think it takes between 5 and 10 horse power to do so.

If any of you are familiar with electric motors you can imagine how big the electric motor required to do this would be. It would also require over 4,000 watts of electrical capacity to power that motor.

I prefer to use my waste gasses to power my compressor.