Which chart are you looking at? I don't see a chart for electricity sources on that page. When I go to the page for electricity mix (https://ourworldindata.org/electricity-mix) and choose Brazil in the chart, I get a total of 77.46% of electricity coming from renewables (not including nuclear) for 2021. If we include nuclear, it's 80%.
It's usually higher than 80% without including nuclear, but 2021 had significantly lower hydro due to drought. Fortunately the huge investment in wind and solar kept that number close enough to 80%. Had that investment not happened, the numbers for 2021 would be much lower.
There were multiple decades in Brazil where 80% of electricity came from hydro alone.
It's usually higher than 80% without including nuclear, but 2021 had significantly lower hydro due to drought. Fortunately the huge investment in wind and solar kept that number close enough to 80%. Had that investment not happened, the numbers for 2021 would be much lower.
There were multiple decades in Brazil where 80% of electricity came from hydro alone.