I need to fix this with the wire in the trailer since I don't want to re-run the battery to converter wiring at this time. It looks like the wire is run directly from the batteries to the converter.
The most cost effective tool I've found is the Quick Cable Quick Crimp 250. It's hand operated hex tool. It's still quite pricy at ~$200.
I can't figure out the inexpensive hydraulic tools. It seems as if in many cases the dies are not quite right - as if they are set up for a different application. At least the Harbor Freight one claims to have dies in an AWG scale vs MM like some of the other ones I see.
Even if crimper supports AWG sizes you need different dies depending on the lugs (Battery/Starter type vs thicker power type). I don't know which the HF supports, it can't be both though.
Whatever tool I buy, I think it should at least have instructions that show what lugs it's compatible with....
If I'm willing to pony up for the Quick Cable tool, does anyone know if it will work as advertised from 8 to 4/0 cable?
Here's photo of one of the existing crimps:
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