The Compañía Nacional de Fuerza y Luz has asked the rate regulating agency for a 35.56 percent increase, the agency said.
The agency, the Autoridad Reguladora de Servicios Públicos said that the company wants a 25.8 percent increase to cover future power purchases, and it wants 7.71 percent more to cover purchases it already made from its parent, the Instituto Costarricense de Electricidad.
The Compañía Nacional de Fuerza y Luz provides power to much of the Central Valley except Heredia and Cartago, which have municipal companies.
The regulating agency noted that prior requests by the power company have been rejected.
In the filing the company also said it seeks a rate for generating power that is 250 percent greater than that of its parent. The company maintains some wind generating systems that have been the subject of criticism of their operation and cost.
If the regulating agency decides that the rates should be raised, a public hearing will be held. Representatives of industry and other big power users are sure to protest.