Luminous inverter and ups and batrrys are very good this inverter backup is very good I realy like it I am purchase this ups in 2010 and use this on desktop around 3 to 4 hours continue and 1 lcd and 3 fans with 4 lights continue 12 hours this backup is very nice when I purchase this they give me 2 years company warante but now my luminous ups complete our 5 years but not have any single problem on it and I am purchase 2 batrys with it they change after 3 years with good backup I realy like luminous all products