[asdefghyk]

Multiday renewable droughts ( solar and wind ) are a significant challenge. ( A further problem would be if a renewables drought occurred at a (multiday) peak demand period ) Appropriate (often new) wide area, power transmission networks can help to reduce this risk. Renewables also need to be over provisioned to reduce the risks, which could be blackouts or some kind of power rationing (via "smart meters" )

[tcfhgj]

ideally power rationing is not needed thanks to the electricity market - and you could still perform an intentional brown out to avoid a black out