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Could you please walk through a basic explanation of NPV?

Information about Net Present Value (NPV) can be found in slides 17-18 of the presentation from IRP Conference 1, held May 8, 2026, available here: https://devirp.dominionenergy.com/img/feedback/media/May-8---Stakeholder-Conference-1.pdf. In addition, for a full explanation of these slides, please view the Recording from IRP Conference 1, beginning at time stamp 0:25:20.

Other Stakeholder Questions and Answers

• The example slide 17 in the materials from IRP Conference 1 shows the NPV of an individual renewable project that earns REC revenue. How would REC costs be reflected for individual projects that do not generate RECs, such as natural gas fired resources?
• If "capacity costs" are a commodity, and it is a major cost driver, how do you estimate that cost and the volume of capacity required by year?