You can choose to purchase two years’ worth of green power at occupancy, rather than pay monthly or yearly. In this case, you would purchase double the percentage of assumed annual electricity consumption to satisfy the credit’s two-year commitment. 

You can choose to purchase two years’ worth of green power at occupancy, rather than pay monthly or yearly. In this case, you would purchase double the percentage of assumed annual electricity consumption to satisfy the credit’s two-year commitment. For example, a LEED-CS project would purchase 70% (or more) of the core-and-shell assumed annual electricity consumption.