Power outages are an unavoidable challenge that every business has to face at one point or another. An emergency power generator acts as a backup power source for lighting, heating, ventilation, medically equipment in hospitals, data storage in data centers and the HVAC systems in centers. These generators are usually powered by diesel for reliability and long duration use. Advanced units can be set to start automatically during a power outage or be switched on manually. Regular maintenance is essential to ensure that the unit is ready to provide backup power, which is why testing the system is also recommended.