[Schroedingersat]

No they don't. Proposing international transmission from the equator over a hanful of many thousand km long lines in competition with your neighbors in all directions as a sole source of winter energy is far more fragile than a mixture of local fossil fuel reserves, nuclear, local production, and imports from any direction from immediate neighbors.

PVs solve net energy needs. Perovskites might even make them do so without needing strategic mineral reserves. But they don't really provide energy security, and keeping fossil fuel infrastructure working for 1 month in 30 is extremely costly.

> You are always free to invent falsehoods about pumped hydro, as about anything else.

Then show the real numbers. I did. Demonstrate it being viable as a significant portion of primary energy in a typical country as a new project.