One of the main issues discussed during the bilateral contacts was the use for calculations at the EU level of "primary energy savings" (derived from "primary energy consumption", which includes the generation and transport of energy), as favoured by the Commission, versus "final energy savings" (derived from "final energy consumption", which is the amount consumed by end users), preferred by several member states.
Üks peamistest küsimustest, mida kahepoolsete kontaktide raames arutati, oli „primaarenergia säästu” (tuletatud „primaarenergia tarbimisest”, mis hõlmab energia tootmist ja transporti) kasutamine ELi tasandil tehtavate arvutuste puhul, nagu soovitab komisjon, vastandina „lõpliku energiasäästu” (tuletatud „energia lõpptarbimisest”, mis võrdub lõppkasutajate poolt tarbitud kogusega) kasutamisele, mida eelistab mitu liikmesriiki.