Per mass, aluminum is better than copper. That's why modern high voltage lines have aluminum conductors around a steel core, while "advanced conductors" (aka Hi

Per mass, aluminum is better than copper. That's why modern high voltage lines have aluminum conductors around a steel core, while "advanced conductors" (aka High Temperature Low Sag) densely pack aluminum around a composite core. https://pv-magazine-usa.com/2023/11/20/reconductor-existing-transmission-to-unlock-renewables-says-uc-berkeley-study/ https://pv-magazine-usa.com/2023/11/20/reconductor-existing-... https://haas.berkeley.edu/wp-content/uploads/WP343.pdf#page=26 https://haas.berkeley.edu/wp-content/uploads/WP343.pdf#page=... https://www.entsoe.eu/Technopedia/techsheets/high-temperature-low-sag-conductors-htls https://www.entsoe.eu/Technopedia/techsheets/high-temperatur...