Manufacturer , Exporter & Supplier Of Solar Hybrid Air Conditioner In Delhi & NCR ALTEK ENERGY SAVER SOLAR AIR CONDITIONER (ALTEK ESAC) Solar air conditioning refers to an air conditioning (cooling) system that uses solar power as a primary energy source by converting solar energy to electricity. This makes the system very energy efficient and cost effective. ESAC works on a hybrid system which combines photovoltaic technology (PV) with direct current (DC). It automatically switches between solar and battery power as needed. In hybrid mode, this system charges its batteries when the sun is shining and when it isn't, the system runs on battery backup while charging its batteries by alternating current (AC) power.