Bare copper would heat up when it oxidizes the tinned coating would have a higher contact resistance. What would be safer? should i just use zinc-it galvanizing paint? it's for my MPPT 250/100 - Tr terminals
asked
Is tinned copper recommended?
Bare copper is fine unless you are in a marine environment, tinned copper is better in that case. I would not use zinc rich paint on electrical connections.
Tinned copper is best in a marine environment. Terminals crimped on bare copper and covered with a thick layer of grease have also proven to be effective and cost-effective against oxidation.
I definitively would not put anything between the wires and the terminals ; metal to metal connection has the lowest resistance.
