Professional lighting are manufacturers of a wide range of emergency lights, luminaires, ups systems and servo-controlled voltage stabilizers. They now offer autopro centralised emergency power supply system in different capacities to suit different load ratings. It is a modern system compactly designed for instant take over during power failure, is silent, automatic, maintenance-free, economical and safe. It involves no risk of fire or fumes and needs no petrol or kerosene for its operation like ordinary generators. In case of power failure it automatically supplies power to the lights, fans and other household appliances or office equipment, epabx, telex, etc. The inverter block is the heart of the whole system. When power fails, the inverter block immediately goes into action and supplies power to the respective load from batteries, thereby maintaining constant power at the output. When power resumes, the inverter stops automatically, allowing the main line to flow at the output load side; simultaneously, the charger recharges the batteries. The system is available in capacity range from 150 va to 3,000 va and upwards.