This isn't strictly true, but isn't strictly false. Power plants are often built to supply power to aluminum smelters, like in New Zealand [1], Oman [2], and Ic

This isn't strictly true, but isn't strictly false. Power plants are often built to supply power to aluminum smelters, like in New Zealand [1], Oman [2], and Iceland [3], but they're usually connected to the grid in the end. Iceland has a grid circling the island [4], Oman is upgrading its grid and building out interconnects [5][6], and in New Zealand, Manapouri went from exclusively supplying the Tiwai Point smelter to being a power station of the South Island grid. [1] https://en.wikipedia.org/wiki/Manapouri_Power_Station https://en.wikipedia.org/wiki/Manapouri_Power_Station [2] http://www.powerengineeringint.com/articles/print/volume-17/issue-9/special-project-report/state-of-the-art-ccpp-fires-omanrsquos-new-aluminium-smelter.html http://www.powerengineeringint.com/articles/print/volume-17/... [3] https://en.wikipedia.org/wiki/K%C3%A1rahnj%C3%BAkar_Hydropower_Plant https://en.wikipedia.org/wiki/K%C3%A1rahnj%C3%BAkar_Hydropow... [4] https://nea.is/hydro-power/electric-power/transmission/ https://nea.is/hydro-power/electric-power/transmission/ [5] https://www.omangrid.com/en/Pages/Existing-Transmission-System.aspx https://www.omangrid.com/en/Pages/Existing-Transmission-Syst... [6] https://businessgateways.com/news/2017/07/30/Oman-plans-to-interconnect-north-south-power-grids https://businessgateways.com/news/2017/07/30/Oman-plans-to-i...