As far I my PC UPS is concerned, I put my 4 cents on APC UPS. I am using it since 3 years and it is still doing good job without fail on any day. And for the inverter, I am using Amara Raja inverter with 165AH Tata Green battery. I do not choose APC because the support is not so good in Hyderbad though it is extremely good in Metro cities. Amara Raja combined with Tata Green batteries are giving me a backup time of over 2-3 hours for entire home. If I switch of few electrical components or my PC it can give more backup. I am pretty fine with the inverter and battery.