How can I calculate how many volts,watts and joules I want in a UPC?

[LAPIII]

Also, which company has the best warranty? I've read that AVC well replace the unit right away if needed!

 

[LAPIII]

Excuse me, I meant APC

 

[meodowla]

Check this link:

http://global.msi.com.tw/index.php?func=power