The duration of PPAs ranges from 7 to 20 years, calculated from the date on which the power plant starts operating; most of them have been concluded for a period of more than 15 years.
Elektrienergia ostulepingute kestus ulatus seitsmest kuni kahekümne aastani alates kuupäevast, mil elektrijaam alustas tegevust; enamik lepingutest sõlmiti kauemaks kui viieteistkümneks aastaks.