Comparing Renewable Plans in Duquesne (Pittsburgh) Region

The ESCOs in the Duquesne (Pittsburgh) region also offer another option when switching electricity - choosing if a customer wants a certain percentage his or her electricity to be generated via renewable sources (most use wind and/or solar). Here I have graphed another time series (Oct 2010 - Jul 2013), this time comparing the average rates of plans that have renewable generation. Plans offered in the Duquesne region offer 2%, 12%, 20%, 50%, and 100% renewable options. Observations: 1 - On average, renewable plans through ESCOs are competitive to Duquesne's price to compare (PTC). While the 100% Renewable plan was initially higher than the PTC, it stayed consistently lower for over a year (Apr 2012 - May 2013). 2 - As expected, the lower the percentage of renewable generation, the cheaper the tariff. The average rate for 50% renewable plans, however, strayed from this trend - it was the lowest rate offered between May 2012 - Dec 2012. I will follow up with re