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TCAAP Energy Integration Resiliency Framework Energy Source Implementation 32 3.1.6. Greenhouse Gas Emission Reductions Implementing a solar PV array in the Primer Tracer area will result in a reduction of greenhouse gas emissions. Electricity offset by the solar output would be reduced to zero tons of CO2 per year. The estimated greenhouse gas emission reduction is estimated to be 7,524 tons CO2/year, calculated by comparing the current Xcel Energy emission rates for the production of electricity in the Upper Midwest Region (1,041 CO2 lbs/MWh4) as detailed in Table 8. Solar PV Greenhouse Gas Emissions Reduction Solar Electric Generation 14,456 MWh Eliminated Electric Utility Emissions 1,041 lbs CO2/MWh Total CO2 Emissions Savings per Year 7,524 tons CO2/year Table 8: Estimated annual carbon dioxide emissions reduction 3.1.7. Community Solar Garden Program Approach The modeled subscription rate for solar PV assumes that solar garden developers would elect to sell the Renewable Energy Credits (RECs) to Xcel Energy, for subscribers to receive a $0.02/kWh enhanced bill credit. If the developer were to retain the RECs for this system, the bill credit would decrease by 2 cents/kWh. The estimated subscription rate is slightly less than the current Xcel Energy average Residential and General Service bill credits; however that difference will increase over time if Xcel Energy applicable retail rates increase and the subscription rate remains fixed. Table 9 shows how this estimated first year subscription price for the electricity generated by the solar garden compares to the Xcel Energy bill credit rates for three types of Xcel Energy customers. It is assumed that the economic benefits of the solar garden subscription would improve as the electricity rate increases over the life of the subscription. 4 https://www.xcelenergy.com/staticfiles/xe/Corporate/CRR2013/environment/emissions-reporting.html