Energy charging apparatus, energy saving apparatus, energy consuming apparatus, and method of managing green energy

A method of managing green energy comprising:

• measuring an amount of input green energy received from a green energy source and an amount of saved energy;
• requesting issuance of a certificate for certifying the input amount of green energy;
• comparing the input amount of green energy to the amount of saved energy;
• issuing the certificate if the input amount of green energy coincides with the saved amount of energy, or not issuing the certificate if the input amount of green energy does not coincide with the saved amount of energy;
• acquiring the certificate;
• preserving the certificate;
• and
• discarding the certificate if the amount of green energy that is certified by the corresponding certificate is output.

A method of managing green energy comprising:

• measuring, by an energy consuming apparatus, an amount of green energy that is received from a green energy source and supplied from an energy saving apparatus if the green energy is supplied from the energy saving apparatus;
• acquiring a certificate managed in association with the energy saving apparatus and certifying the amount of green energy saved in the energy saving apparatus;
• comparing the amount (X) of green energy supplied from the energy saving apparatus and the amount (Y) of green energy certified by the certificate;
• and
• issuing the certificate for certifying the amount of green energy that corresponds to a difference (Y−X) between the amount (X) of green energy supplied from the energy saving apparatus and the amount (Y) of green energy certified by the certificate if the amount (X) of green energy is smaller than the amount (Y) of green energy, and not issuing the certificate if the amount (X) of green energy is larger than the amount (Y) of green energy,
• wherein the acquired certificate is discarded and the issued certificate is managed in association with the energy saving apparatus.