This document includes questions and answers that pertain to the ARPA-E Funding Opportunity Announcement (FOA) entitled "DE-FOA-0003163: Pioneering Railroad, Oceanic, And Plane Electrification with 1k energy storage systems SBIR/STTR (PROPEL-1K SBIR/STTR)".  The full solicitation on the PROPEL – 1K SBIR/STTR FOA and additional information can be found on the ARPA-E Funding Opportunity Exchange website (https://arpa-e-foa.energy.gov).