Launch of new unit at Sayano-Shushenskaya HPP

December 21h, 2012

RusHydro Launches New Hydropower Unit at the Sayano-Shushenskaya Hydropower Plant

JSC RusHydro announces that a new hydropower unit was commissioned and put into commercial operation at the Company's Sayano-Shushenskaya hydropower plant.

The new unit is already the fourth newly manufactured one that was put into commercial operation at the Sayano-Shushenskaya HPP. Currently, the working capacity of the Sayano-Shushenskaya HPP is 3,840 MW with six 640 MW units in operation. Two of the old units, restored after the accident, have been decommissioned and will be replaced by new ones. The Company plans to put into operation one more new hydropower unit in March 2013.

The Sayano-Shushenskaya hydropower plant will be fully equipped with new up-to-date equipment with enhanced performance characteristics that meet all safety and reliability requirements by 2014. The useful life of the new units has been extended to 40 years and maximum efficiency now reaches 96.6%. They also have improved energy and cavitation features. The turbines will be fitted with a more efficient process protection system, which will automatically shut down the unit in case of any inadmissible deviations from controlled parameters.

For more information:

JSC RusHydro, Investor Relations Department

Tel. +7 (495) 225-3232 ext. 1319, 1394, 1607

[email protected]

DISCLAIMER

The information in this press release may contain projections or other forward-looking statements regarding future events or the future financial performance of RusHydro. One can identify forward-looking statements by terms such as "expect," "believe," "anticipate," "estimate," "intend," "will," "could," "may" or "might," the negative of such terms or other similar expressions. We wish to caution you that these statements are only predictions and that actual events or results may differ materially from these statements.

We do not intend to update these statements to reflect events and circumstances occurring after the date hereof or to reflect the occurrence of unanticipated events. Many factors could cause the actual results to differ materially from those contained in our projections or forward-looking statements, including, among others, general economic conditions, our competitive environment, risks associated with operating in Russia and rapid technological and market changes in our industries, as well as many other risks specifically related to RusHydro and its operations.