Costa Rica's national electricity grid ran for a record 300 consecutive days in 2017 on renewable sources alone, mainly hydro, wind, and geothermal power, one of the longest such streaks documented for any nation.
Record no. MRB-2026-006310
Most Consecutive Days Running on 100% Renewable Electricity
Reference Record – Not Certified
This record is compiled from publicly available sources for reference. It has not been examined or certified by The Book of World Records.