New posts in Ups

Why shouldn't two AC sources be connected in parallel?

5V ups circuit oscillating?

Extending the backup runtime of a UPS with an external car battery

Some advice on charging circuit used in simple UPS

12V DC UPS for Network Equipment

Should the UPS output be exactly same in normal and battery backup modes? Or it is normal to have a slight variation in voltage or something?

How does the capacity (kVA) of a UPS affect my power consumption?

Identify an Unusual USB Port

Implications of AC power failure on suspended Linux box

When do I need a pure sine wave UPS?