We calculate the carbon-intensity of the grid electricity based on the US Environmental Protection Agency's (EPA's) eGRID data and report, which reflects the state of emissions as of 2019.
We calculate the carbon-intensity of the grid electricity based on the US Environmental Protection Agency's (EPA's) eGRID data and report, which reflects the state of emissions as of 2019. We use the state-specific carbon intensity of the grid, and a general transmission-and-distribution-loss assumption for the whole United States.
We then simply calculate the greenhouse gas emissions savings as:
Note: These are the avoided emissions per kWh produced by behind-the-meter solar. To calculate the avoided GHG emissions for a commissioned installation, we multiply this by the annual solar production. In addition, it is also important to note that we are currently not taking time of day or seasonal variations into account with these calculations.