Estonia produced 42 percent less electricity in June compared to the same month in 2014.
Elering, the state-owned power transmission system operator, said the dip in production was one of the largest in recent years.
The company said the reasons lie in an open power market with Scandinavian countries producing more power due to a good year for hydro electricity.
Estonia produced 540 gigawatts of electricity, consuming 574 gigawatts. Power generation on the whole decreased, by 22 percent, in the Baltics despite both Latvia (up 2 percent) and Lithuania (up 37 percent) increasing production, compared to June 2014.
Electricity prices in June were the lowest on record for Estonia on Nord Pool Spot, the Nordic electricity exchange, at 27.26 euros per megawatt-hour. The main reason was increased electricity power flow with Finland, where prices were around 21 euros.
Editor: J.M. Laats