D.11-09-015 adjusted this 437 kgCO2/MWh factor downward by 20% to reflect the fact that the utilities’ electricity resource mix includes renewable resources required under the RPS statute. D.11-09-015 stated that ARB’s emissions factor of 437 kgCO2/MWh was on the [weighted average] emission rate of gas-fired power plants from “based 2002 to 2004, and it does not reflect the lower emission rate of newer gas-fired units that SGIP projects may avoid going forward.” D.11-09-015 adopted a 7.8% average transmission and distribution line loss factor to account for the electricity and associated emissions saved by serving load with on-site generation. D.11-09-015 adopted a time frame of 10 years for evaluating whether SGIP projects reduce GHG emissions and an assumed degradation in electrical conversion efficiency of 1% per year. Storage technologies do not directly emit GHGs; they may cause emissions to occur when they charge and displace emissions when they discharge. In resolution E-4519 the Commission determined that a minimum round-trip efficiency for storage technologies of 63.5% was required for a storage device to be GHG reducing. SB 861 extended SGIP from January 1, 2016 to January 1, 2021 and added § 379.6(b)(2). Insufficient data was provided to merit changing the assumed 1% per year degradation in conversion efficiency. No party provided compelling reasons to revise the 10 year time frame for evaluating whether GHG emissions reductions occur.
D.11-09-015 adjusted this 437 kgCO2/MWh factor downward by 20% to reflect the fact that the utilities’ electricity resource mix includes renewable resources required under the RPS statute. D.11-09-015 stated that ARB’s emissions factor of 437 kgCO2/MWh was “based on the [weighted average] emission rate of gas-fired power plants from 2002 to 2004, and it does not reflect the lower emission rate of newer gas-fired units that SGIP projects may avoid going forward.” D.11-09-015 adopted a 7.8% average transmission and distribution line loss factor to account for the electricity and associated emissions saved by serving load with on-site generation. D.11-09-015 adopted a time frame of 10 years for evaluating whether SGIP projects reduce GHG emissions and an assumed degradation in electrical conversion efficiency of 1% per year. Storage technologies do not directly emit GHGs; they may cause emissions to occur when they charge and displace emissions when they discharge. In resolution E-4519 the Commission determined that a minimum round-trip efficiency for storage technologies of 63.5% was required for a storage device to be GHG reducing. SB 861 extended SGIP from January 1, 2016 to January 1, 2021 and added § 379.6(b)(2). Insufficient data was provided to merit changing the assumed 1% per year degradation in conversion efficiency. No party provided compelling reasons to revise the 10 year time frame for evaluating whether GHG emissions reductions occur.