Daylight Savings Time
Policy measure

In an attempt to reduce electricity demand and promote saving and efficient use of energy resources, the Government of Guatemala implemented Daylight Savings Time to take full advantage of sunlight and keep power bills low. This measure affected the entire economy, including industry (ECLAC, 2010).


The implementation started as of 00:00 a.m. on 30 April 2006, when clocks across the entire national territory were changed forwards by 60 minutes to make maximum use of natural light and manage peak demand in the system. This measure was in place until midnight on 30 September 2006. The rationale behind the action was that electricity generation based on the burning of fuel is more expensive than electricity produced by hydraulic energy. Therefore, during peak hours, between 6:00 p.m. and 10:00 p.m., thermoelectric plants are the last ones the grid will use. The delay of thermal plants use does not only cause a reduction in the consumption of fossil fuels for electricity generation and the resultant environmental pollution, but less foreign currency has to be purchased for this process (ECLAC, 2010).  

No identified challenges.

According to ECLAC (2010), an investigation of both the load and the consumption curve of the national grid in this period revealed that the measure, on average, reduced peak demand by 41.35 MW. Moreover, peak demand began an hour later but subsided at the usual time. This caused overall electricity consumption for the May-September period to drop by 28.8 GWh.


ECLAC (Economic Commission for Latin America and the Caribbean), 2010. Energy efficiency in Latin America and the Caribbean: situation and outlook. Chile: Santiago.