Fuse alternator issue

[1.8Tgolf_Chris]

My car yesterday hesitated starting a few times and started lighting up abs,traction control and airbag in the morning and afterwork yesturday few miles from my house went limp mode, id took a stab in the dark and thought id killed the battery due to having installed a sub.
Today it started fine in the morning but died when i got to work, I noticed the Fuse is melted ontop the battery the terminal to the far left so i was looking at the alternator but its brand new  bought a new fuse box and all the bits 70 odd quid is this likely to fix the problem because i dont actually know why it melted
The car now runs fine now and charges battery again?

[Wazzzer]

If my memory serves me correctly this is the cable coming from the alternator to the battery breaking down, very common

[1.8Tgolf_Chris]

ah i see is it easy to replace do you know im struggling to find any information on it, and according to tps the cable is 45 quid ! Bit steep

[shaft69]

I had to replace alt, line and fuse box.

[matty james]

as wazzer said -either poorly fitted cable or cable knackered .