Вот что пишет Контроник на своем сайте:
Further highlights are waiting inside, for example the strong BEC which is adjustable between 5 V and 6 V with PROGCARD II. It offers 5 A continuous BEC current with 15 A in peak. That is enough for all spectacular flight figures, even in helicopters. To provide this power the JIVE ESCs have got two parallel BEC output jacks.
Unique too is the BEC of the HV Types, which offers 5 A continuous current with 15 A peak current up to 12 S
(16-50 V)! This allows a secure BEC usage for all applications up to 12 S, of course without any Voltage swing and without interferences - proven by thorough tests on our own EMV test bench.
Т.е в принципе никаких ограничений нет.