-
Mark, my isolator is just above the engine so if it gets hot I never was aware. Apparently heat is not going to affect it I hope.
To determine how hot it is getting drive a while and shoot the temps with the temp sensing gun, then after sitting a while, like overnight and shoot them again. All that isolator is supposed to do is to stop current flow from one battery bank or source from passing into another. That prevents one set of dead batteries from sucking the power out of the other set. On my Liberty one alternator charges house and chassis batteries, but draining power from one set will not discharge the other set.