The COVID-19 pandemic has had an impact on the economy, industry, health, and key sectors in almost every country in the world. Electricity generation has been one of the sectors highly impacted by the national measures taken due to the pandemic. In Peru, a mandatory social quarantine was decreed that strongly impacted the demand and generation of electricity in the country.This paper studied the impact of social isolation measures, adopted by the COVID-19 pandemic, on greenhouse gas emissions (CO2, CH4, N2O) associated with the generation of electricity from the interconnected electricity system (SEIN) From Peru. A reduction in greenhouse gases of 1,599,285 tCO2e, equivalent to 60% with respect to the reference scenario, was estimated.