Originally Posted by Nos4r2
The ONLY thing I'll say on solder V crimp is there's a reason it's illegal to solder connections on aircraft.
Personally, I wouldn't join the cable at all. I'd make a new cable.
I assume this is to do with high frequency vibrations and the cable to solder interface? I would expect failures with vibration at the point where the solder ends and flexible cable starts on something prone to high vibration levels.
I also do something similiar as a job (not on boats) and can solder and have access to HD crimping tools. In fact I have crimped cables up to 250mm Cross section using hydraulic tools in the past although I suspect we are not talking QE3 powere distribution here.........
I suppose it really comes down to just how bothered you are about problems arising as a result of the bodge and how exposed the connections are.