Well, After spending a quite a sum for a 30AMP DC to DC, connected battery wrong way around. Victron kit has Diode protection but to get to it you have to smash unit open..
HEY VICTRON STAFF - Its called a thermal resetting fuse OR Auto-Reset Electronic Circuit Breaker OR N-channel MOSFET
Point being out of warranty user error but when people are buying rolls Royce Victron blue we expect much higher standard.
Yes this totally my own fault, could a 10p fuse protected end users yes. also this glue Indian made unable to be opened design. disappointing. £200 gone in 2 seconds.