Should a run a BEC?

[REVO-DADDY]

I am running a Novak HV 6.5 in my Hyper 8 at 4s. The Novak system has an internal BEC. It seems like it is cutting out on me here and there. I am running a decent sized servo, and 2 fans. With one fan disconnected I did not have any issue. However I have not determined that this was not a fluke. I really don't want to add something that I really don't need, but I feel like I'd be better of with a bec.

Could the Novak BEC not be supplying enough power for my needs?