Having a solid backup for your power source is essential for staying up and running when power is down.  Power outages happen with more frequency due to severe weather, aging infrastructure, and overwhelmed grids during warm weather.  Uninterruptible Power Supply (UPS) will allow time to shut down equipment properly and an auto save function will automatically save the last data before electricity was cut.  There are many options to consider in looking for alternative power sources for long term use, but budget will be a factor in making your selection.  While Generators are the best source of power, they are also the costliest.  Planning ahead for power outage will help you be ready when the time comes.  It is not a matter of if…but when.