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The first step in applying to this FOA is registration in ARPA-E eXCHANGE, ARPA-Eās online application portal. For detailed guidance on using ARPA-E eXCHANGE, please refer to Section IV.H.1 of the FOA and the āARPA-E eXCHANGE User Guideā (https://arpa-e-foa.energy.gov/Manuals.aspx).