Because we are far away from nearest civilization we decided to run completely autonomous power system based on solar energy. Hybrid (solar and diesel) power supply system of observatory must work 365 days per year, 24 hours per day. Parameters of system chose from condition of minimal use of diesel generator and minimal price of system. Diesel must work only when there is no sun more than 1 day or total disruption of solar power supply system. At normal operation observatory consume electricity from PV-panels at day or from batteries at night. Batteries charge at day time.Observatory approximately consumes 39 kWh electricity per day; auxiliary equipment of containers (for example air coolers) consumes less than 24 kWh at day time when hot weather period. Therefore maximal consummation not more than 63 kWh at summer time (December) and not more than 40 kWh in winter time (Yuly), because there is no need of air cooling. Night consumption is assented about 30 kWh per day and it is not depended from season. Equipment demands electricity with voltage — 230V and frequency — 50 Hz. Full calculated load of observatory is 5,1 kW, maximal power (start of engines) cold be equal 10 kVA.