APC UPS Blog - ExcessUPS.com https://validator.w3.org/feed/docs/rss2.html Non-Linear Loads and Their Impact on UPS Systems Harmonics and Their Impact on UPS Systems Challenges of Inductive Loads and UPS Systems Inrush Current and Its Impact on UPS Systems Why UPS Systems Struggle with Fluorescent Light Loads Power Factor and Its Impact on UPS Systems Why Sump Pumps Cannot Be Backed Up by UPS Systems Designed for Computers & Data Centers What is a buck-boost transformer? What does it do and how does it work? Why can’t I plug a UPS into a surge protector or a power bar? How does a UPS protect against surges? Step down transformer vs Isolation step down transformer – What’s the difference? Isolation transformers, what are they? Step Down vs. Isolation Step Down Transformers Understanding AVR Boost/Trim in UPS Systems What is a split phase UPS? Line Interactive vs. Online Double Conversion What is a surge and why a UPS is needed How does AVR Boost / Trim work in UPS systems? Electrical Power Surges – What are they? Why are UPS systems mostly rated in VA (volt-amps)? Why does my PC with a PFC power supply not work with a standby/offline UPS? What is a Power Factor (PF) in UPS systems? What’s the difference between VA (volt-amps) and W (watts)? What’s the difference between Watts and VA? Can I plug in a laser printer into a UPS? Why not? What is an internally “Modular” Redundant UPS Configuration? Why is generator power considered dirty? Why are standby / Offline UPSs not generator compatible? Battery LED’s flashing on a Smart-UPS even after Battery Replaced What is a line interactive UPS and what is it used for? What’s a standby UPS and what is used for? What is a Parallel Redundant N+1 UPS Configuration? What is an Isolated Redundant N+1 UPS Configuration? What To Do When The UPS Battery Voltage Exceeds Nominal Battery Voltage What are the Main Types N+1 UPS Configurations? Updating The Firmware Of An APC Smart-UPS Changing The Settings Of An APC Smart UPS To Use Two Batteries What To Do When The UPS Online Light Goes Off Checking Out A Refurbished APC Smart UPS SU3000 What is a PFC Power Supply? The Difference Between Non-Linear Loads and Inductive Loads Dealing With A Battery Constant Issue How to Replace an APC Back-UPS Pro Battery UPS Does Not Work During An Outage What is an N+1 UPS Configuration? What is the shelf life of a UPS battery? How to replace an APC Smart-UPS rack mount battery Should You Plug Your UPS into a Power Strip? What to do when the “replace the battery” light comes on? Why You Can’t Back Up Your Home Refrigerator with a UPS