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Hydroelectricity alone can produce 100% of some countries electricity, but other countries can't produce any [1]. Hydropower is geographically limited, in that

Hydroelectricity alone can produce 100% of some countries electricity, but other countries can't produce any [1]. Hydropower is geographically limited, in that you need the right combination of a river and a valley to build a dam. You can't just scale out hydroelectric power. No country produces the majority of its electricity from wind and solar. Australia produces the 15% and 13% of its electricity from solar and wind respectively. Denmark produces 2.5% and 42% from wind and solar [1]. Unfortunately, battery prices have stopped dropping and started increasing [2]. 1. https://en.wikipedia.org/wiki/List_of_countries_by_renewable_electricity_production https://en.wikipedia.org/wiki/List_of_countries_by_renewable... 2. https://about.bnef.com/blog/lithium-ion-battery-pack-prices-rise-for-first-time-to-an-average-of-151-kwh/ https://about.bnef.com/blog/lithium-ion-battery-pack-prices-...

Retric 3y ago
> No country produces the majority of its electricity from wind and solar. Yet, but infrastructure lasts far longer than the recent dip in prices which favors renewable energy. As to battery costs that article specifically mentions expectations of near term drop in prices, these are long term trends not specific annual guarantees. Solar prices have occasionally increased due to supply shortages even in the middle of vast longer term price drops. Also, countries electric grids aren’t independent outside of a few islands. Globally Hydropower is ~16% of global electricity generation and quite flexible. A country with 100% hydropower generation can easily add wind and solar panels and then export flexible and cheap hydroelectric energy. In fact if you look at countries running over 50% of hydroelectric power they tend to export quite a bit.