Replacing my ACP UPS for delta 3 pro

I was tired of my ACP UPS only running my pc for about 4 minutes, so I am now using a Delta pro 3 4kw on my pc so it will run for about 3 hours minimum. Since we moved to our new home, we have lost power about 6 times in 2 years, and it would never fail I would be transferring large amounts of data to either another HDD or to a Blu-ray and the power would go out causing my to either have to restart the data transfer, or throw away the now coaster for Blu-ray disc and start over. With 3 hours of backup power just for my pc, I don't have to worry about that anymore.