The way I understood it is this. Keep in mind this is just from reading their propaganda, and my interpretation, so take it for what its worth.
Let's say they have windmills producing 100 megawatt/hours of power per month. Calgary Transit "buys" 20 MW/h so they have 80 left to sell to other customers. As long as they don't sell more than 80 MW/h to everybody else, then technically they are selling you green power. As the number starts to go over 80 MW/h they take the money that you and Calgary Transit has spent over and above regular electricity prices to buy themselves more windmills. Now they have 120 MW/h to sell which means another 40 customers at 500 KW/h per month.
Which to me is why they don't convert your entire bill to Greenmax, you buy blocks of it to ensure they aren't overselling it one month.
|