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‘Energy independent’ Uruguay runs on 100% renewables for four straight months
(theprogressplaybook.com)
This is a most excellent place for technology news and articles.
We've been at ~95% renewable for years actually, but now we've reached 100%
How do you cope when there is cloudy without wind?
They also have hydropower which provides a constant base load, and basically they have just heavily optimised their distribution of power to be very efficient. In emergencies they are also able to import power from neighbouring countries.