APPENDIX OF SCOPE II
CALCULATION EXAMPLES
M A R K E T - B A S E D C A L C U L A T I O N S
Multiply 1000 MWh times 750 lbs of CO2e and count in 750 thousand pounds of
carbon dioxide equivalent
An Indiana-based company used 500 Mwhs and purchased 250mwh of RECs. The
recs only cover half of their consumption, and, assuming that they are associated with
0 emissions, you can apply 0 emissions to those first 250 megawatts.
However, if you have half of your MWH attributed to RECs, and the other half not,
there will have to be different methods of calculation for the renewable portion versus
the nonrenewable portion.
1. For this first example, while there is a subregional emissions factor that can be used, the
organization appears to have a supplier-specific emission factor they can use.
2. In the second example, this California organization used 500 mwhs, and again, you can
see the eGRID subregion factor here, but because the California organization opted into a
100% renewable green power program, their market-based emissions would be 0.
3. In the third example there are more specifics:
***This is an older example from the GHG protocol when at the time there was an absence
of a widely used residual mix in the US. Today, we would the Green-e residual mix instead
of the eGRID subregion factor (i.e. the location-based emissions factor) that you see here.
The residual mix will give you a better picture of your consumption in this case.
