darsben wrote:
Why?
You have a 90 amp converter but your DRAW from the battery(ies) remains the same so no upgrade is needed.
Your charge rate should not approach the capabilities of the cable. Clean the connections and make sure all connections are tight.
THIS.
Assuming that the "charging line" will be protected with a 45 amp fuse unless you change it, I vote for trying it out first.
I think that it is HIGHLY unlikely that you well ever approach 90 amps unless your batteries are stone cold dead and maybe not even then.
Routing heavy gauge cable is sometimes REALLY difficult.
