You cannot "make energy" but you can convert energy from one form to another. To make electricity you can convert heat, light from the sun, a water fall or nuclear energy to turn generators or use other methods like photo-voltaic cells . Energy is delivered to the customer in the form of electricity. Electric power is a function of volts and amps and the power consumed is known at watts . Energy companies send electricity over wires to homes and businesses which they convert for lighting, cooling, heating, electronics and other uses.