Analysis of electricity

The environmental burden posed by electricity may differ strongly from one year to the next, especially with larger companies, if one or more of the situations below occur:

• The company purchases a limited quantity of power.
• In some years, the company purchased green power, in other years, it did not.
• The company generates the larger part of its power in its own CHP-installation.
• The company sells part of the CHP-generated power back to the net (and enters it under ‘of which sold back’.)
• In some years, the quantity of power sold back is larger than the quantity of power purchased, while in other years the situation is reversed.

The Envirometer chart depicts these changes in the following manner:

• The power that is purchased contributes to the environmental burden.
• If it concerns green power, the environmental burden is compensated for the larger part and the graph will approach zero. 
• The environmental burden of CHP-power is attributed to the natural gas that is used by the WKK installation, and is therefore invisible in the electricity chart.
• If power is sold back, the environmental burden is lowered (by the value of regular power).

The charts are affected in the following way: 

• Without green power, the electricity chart will follow the difference between purchased and sold back.
• With green power, the electricity chart will follow the amount of power sold back.