Emissionality

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Definition: Emissionality, coined by WattTime, is a quantitative measurement that compares the impact of renewable energy projects on driving down emissions. Due to the uneven distribution of clean energy in the United States, where a renewable energy project is built has a large influence over how much carbon it is reducing, or directly replacing.

Required Data

Emissionality metrics use interval data (typically hourly data) of generation (and/or RECs) and marginal carbon emissions data. The users would supply the generation and REC data while the marginal carbon emissions data is to be sourced from WattTime.

Metrics

Our Emissionality dashboard contains the following methodology metrics:

Total Procurement (RECs, PPA Off-take Agreements, etc)

Marginal Carbon Emissions Rate

Marginal Carbon Avoidance

Average Marginal Carbon Avoidance

Dashboard Walkthrough

The Emissionality dashboard can be found under the Metrics Dashboard section in the sidebar.

Introduction

The first view of the Emissionality Dashboard will showcase filtering on the year, the date range, and the granularity (monthly, daily, or hourly). It will also showcase the Contractual Instruments, where it can be broken down by the contract details and the generation source of the selected Contractual Instrument, the yearly total of the Marginal Carbon Avoidance, and the yearly total of Energy Generation.

Marginal Carbon Avoidance

The Marginal Carbon Avoidance is showcased over time, based on the granularity view (below is a monthly view). A CSV file of this data can be downloaded.

Marginal Carbon Emissions Rate

The Marginal Carbon Emissions Rate is displayed by a ‘8760 heatmap’ and displayed by the grid region the Contractual Instrument is located in. A CSV file of the latter can be downloaded.

Energy Generation

The granualer energy generation is displayed by the granularity specified (example below is monthly) and by a ‘8760 heatmap’. A CSV file of the former can be downloaded.