It is advisable to go the professional route and find a company that is able to advise you what’s best for your needs – one that can professionally install your unit and also a company that can service your unit should the need arise!
There are different types of UPS Systems but the most common UPS categories of modern UPS Systems include Standby UPS Systems, which is also referred to as Off-Line UPS, Line Interactive UPS and On-Line UPS.
A Standby or Off-Line UPS system is usually used for when the load is powered directly from the utility and the backup power only kicks in if the main power fails. This UPS system is extremely basic and only provides surge protection and battery backup to enable businesses and individuals to save their data and shut down their devices safely. The Off-Line UPS can withstand under-voltage brownouts and surges without consuming the reserve power from the battery plus it is able to automatically select various power taps on the autotransformer.
A Line-Interactive UPS, on the other hand, preserves the inverter in line and transmits the battery’s DC current path from the usual charging method to supply current as and when the power goes down.
Online UPS System uses a method referred to as a “double conversion” which accepts the AC input, and correcting to DC, passing through the rechargeable battery.
There are definite distinctions regarding the UPS Systems being used – for example massive power units require UPS supplies where a synchronous alternator or motor is attached on the mains through the use of a choke. Power is then stored in a Flywheel and when the power is intermittent an Eddy Current directive upholds the power on the load. At times a diesel UPS supply is required and is referred to as a DRUPS.