This is solvable, but it will require international cooperation on a scale that is unlikely. But you wouldn't need any storage at all, just a large number of long distance HVDC lines to move the energy from wherever the sun is shining to where it isn't.

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leonidasrup an hour ago | parent [-]

It solvable but very expensive.

The costs of large number long distance HVDC lines with accompaning invertor stations would be as expensive as a electric generation based on nuclear power.

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jacquesm an hour ago | parent [-]

I don't think that is true. The bigger problem is the international cooperation required, as well as that such a system would be vulnerable to attacks.

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leonidasrup an hour ago | parent [-]

" The cost of the electrical equipment that brings the offshore renewable energy from the wind turbines to the shore is in the same range as the cost of the wind turbines themselves. The future offshore grid will need tens of billions of Euros of investments in HVDC transmission infrastructure. For instance, Dutch-German transmission system operator TenneT has contracted 30 G€ for such connections in the North Sea. "

https://blog.sintef.com/energy/future-hvdc-grids-yes-please-...

	▲	jacquesm an hour ago \| parent [-]
		Yes. Those links will be built anyway. Once you have them it isn't a huge stretch of the imagination that you could cross connect them. Check out a map of how many of those we have now, compare with two years ago or so and see how fast the buildout is. North-South links would take care of the seasonal variation and East-West links would lengthen the day.