Both Congress and the administration are ramping up their focus on a national clean energy standard. A CES is a sectoral approach to decarbonizing the power sector that requires increasing amounts of qualifying clean energy sources over a certain time period. By creating a market for clean energy credits, a CES drives the transition towards cleaner sources of electricity.
On April 21, 2021, the United States government set its “nationally determined contribution” (or NDC) under the Paris Agreement. The NDC establishes an economy-wide target of reducing U.S. net greenhouse gas emissions by 50-52 percent below 2005 levels in 2030. In developing the NDC, the United States considered sector-by-sector emissions reduction pathways and has set a goal to reach 100 percent carbon pollution-free electricity by 2035. A national CES is a key policy mechanism to achieve electricity emissions reductions.
Although the concept of a national CES is built upon similar policies successfully implemented at the state level, there are a set of key policy design decisions that must be made when developing a federal CES. There have been several legislative proposals introduced in the 116th and 117th Congresses that have included a CES, and the table below compares select design choices in these bills.
|Issue||Pallone CES CLEAN Future Act of 2021||DeGette CES Clean Energy Innovation and Deployment Act of 2021||Smith/Lujan CES Clean Energy Standard of Act of 2019||McKinley/Schrader CES Clean Energy Future Through Innovation Act of 2021|
|What is the target of the CES?||80% clean energy required in 2030 and 100% in 2035||100% clean energy to be achieved between 2035 and 2050, depending on the pace of innovation||100% clean energy by 2050 (based on rate of increase so all electricity suppliers may not reach 100% by 2050)||80% reduction in carbon dioxide emissions emitted by electricity generators, below the level of enactment, by 2050|
|What is the credit submission requirement between 2023 and 2030?||Requires every Retail Electricity Supplier (RES) to submit enough Zero-Emission Electricity Credits (ZEC) in 2023 to account for a baseline of clean energy generation -- the baseline being the average of the RES's levels of clean energy generation in 2017-2019. Each year from 2024 to 2030 will require an increase of 1/7th of the difference between 80% and the 2023 baseline. In 2030, each RES will be required to submit enough ZECs to cover 80% of its electricity sales.||The number of ZECs required in 2023 and 2024 will represent the average percent of zero-emission electricity sold by the RES from 2017-2019. From 2025 onward, the ZEC submission requirement will be a rolling average of the zero-emission electricity sold over the previous three years.||Utility compliance will begin second full calendar year after date of enactment. The necessary rate of increase in a retail electricity supplier's clean energy mix is 2.75% when the utility's proportion of clean energy sales (+ behind-the-meter consumption) is less than 60%. The necessary rate of increase in a retail electricity supplier's clean energy mix is 1.75% when the utility's proportion of clean energy sales (+ behind-the-meter consumption) is greater than 60%.||Requires the linear reduction of carbon dioxide emitted by electricity generators to 80% by 2050. This requires the Secretary of Energy to convert the required percent of emissions reduction to a required percent of clean energy for electricity generators. The % of required clean electricity generation will be uniform for each electric utility. For the first compliance period, the Department of Energy is required to project emissions requirements to facilitate planning for utilities.|
|Could the CES achieve a 100% zero-emission power sector earlier than its target, if the technology is available?||Requires every RES to submit enough ZECs by 2035 to account for 100% of electricity sales, or to pay the Alternative Compliance Payment (ACP). Defers the increases, beginning in 2031, for any RES that submits an ACP for more than 10 percent of its compliance obligation for two consecutive calendar years, up to a maximum of five years' deferral.||Advances the date of achieving 100% clean energy to as soon as 2035 only if the technology is available to do so, as indicated by the price of ZECs remaining low year-after-year from 2025.||There is no compliance obligation to reach 100% zero emission power sector earlier than the target year if the technology is available.||There is no compliance obligation to reach an 80% reduction of carbon dioxide emitted by electricity generators earlier than the target year if the technology is available.|
|How does the CES address the possibility that the technology may not arrive as late as 2050?||Companies not achieving 100% by 2035 will have to pay ACPs each year from at least 2035 on. If the industry is unable to achieve more than 80% zero-emission electricity (given current technology), the ACP will likely be paid from 2030 on.||Companies will have to pay an ACP.||Companies will have to pay an ACP.||Companies will have to pay an ACP.|
|Does the CES give credit for natural gas?||From 2023 - 2030, fossil units are credited as a function of (a) the extent to which their direct carbon emissions are lower than that of an uncontrolled coal unit, for example, through the use of an uncontrolled gas unit or CCS, and (b) the methane waste associated with the extraction, processing and transportation of the fossil fuel. From 2030-2035, credit for gas units declines steadily, until from 2035 on gas units receive no credit without CCS.||Same as the Pallone CES from 2023 - 2030, except that this continues indefinitely, with no phase down or elimination of credit for uncontrolled gas. Note that the rising prices of ZECs will reduce the value of gas-powered generation, eliminating it at whatever point between 2035 and 2050 that the technology has become available to eliminate the industry's emissions.||For qualified natural gas (coal mine methane, but not landfill methane or biogas), the carbon intensity is adjusted to account for methane leakage rates, which will alter how the generator is credited. Emissions benchmark of 0.40 metric tons of CO2e/MWh effectively excludes natural gas from earning credits.||The emissions benchmark of 0.82 metric tons/MWh would allow natural gas to receive a partial credit.|
|What are the Alternative Compliance Payment levels?||Starts at $40/MWh in 2023 and increases by 3% annually plus inflation. |
|Starts at $21.50/MWh in 2023 and increases $1.50 annually plus inflation. |
|Start at $30/MWh and increases by 3% plus inflation annually through 2029 and 5% plus inflation annually starting in 2030. Assuming for comparison that compliance begins in 2023, the ACP levels would be: |
|Start at $30/MWh for the first year of compliance (which is approx. 10 years from enactment) and increases by 5% annually. Assuming compliance begins in 2031, the ACP levels would be:
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