The percentage comes from the purchase of 54 thousand 106.1 megawatt hours (MWh).
The purchase serves some 180 thousand 300 houses with an average consumption of 300 kilowatt hours per month, according to data from the National Energy Commission (CNEE).
"Carlos Colom, president of the National Energy Commission (CNEE), indicated that the result of the interconnection, besides stabilizing the system to avoid blackouts or reinforce what is generated by the country, is that at certain times during the day it helps lower the price (spot price for energy market opportunity)", reports Prensalibre.com.
Purchase of electricity coming from Mexico halted on 31 August due to the expiry of a temporary contract.
The exchange will resume once the new contract comes into force between Guatemala's National Electrification Institute and Mexico's Federal Electricity Commission (CFE in Spanish).
From May of next year, Mexico's state-owned Federal Electricity Comission (CFE) will begin to sell Guatemala 200 megawatts of power under a five-year accord signed in 2006.
The CFE has built transmission lines to the border, but work remains to be done on the Guatemalan side before the accord can be implemented.
César Fernández, director of Guatemala's National Electricity Commission said the accord would remove the threat of blackouts in Guatemala. The CFE will sell the power at the price it charges in Mexico, but without the subsidies that the government there gives consumers.
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