Personally I would suggest an APC Smart Ups VA ( SUA or SMT ) , then depends how much you want to go on while there's a power cut... 750 to 1500 (with the latter if you want to have power for around 1 hour probably). With good power supplies , a good ups is required... otherwise the psu gets slowly damaged.
Hi,   Recently i purchased Dell Precision 7820 tower station after having interaction with Dell technicians. Recently i had a lot of power cuts in my house, hence i would like to have one UPS for my workstation. Requesting technicians to suggest suitable battery backups/UPS necessary for Dell Precision 7820 tower station  and do the needful   Regards K S Chidanand Kumar
UPS required for Dell Precision 7820 tower station