30kva ups 60x12v 7ah or 9ah battery can enter inside
half load can do 30 minutes
full load can do 15 minutes back up
inbuilt battery systems requres 24 hours power in the site and ats system need to be there
main duty of the ups to back up power short time a to stop power shut down between nepa and genset change over also stabiliser and protect equipment from bad network affects
more back up time possible by increasing battery capacity with external battery bank