The article is about the role of renewable energy objects such as pumped storage power plants (PSPP) within energy systems and their status on energy markets in Russian Federation and abroad. Problems and weakness of acting methods of tariff estimation are measured; the necessity of changings in tariff policy is emphasized. Article describes results of approbation of methodology for estimating of tariff bonuses, which are proved by the system impact of PSPP in regimes for maintenance of system reliability. Significant improvement of the investment attractiveness of PSPP from bonuses for system efficiency is shown.