I have a 2016 Lexus ES 350. I have been thinking about putting in a battery isolator to run a second lead-acid battery....deep cycle gel pack and run my equipment directly off of it so as to never drain my primary starting battery. I have looked at a lot of isolators....was thinking about the Blue Sea ACR. Then I read about the Mountain Radio version.....which is a bit higher in price. However, I have heard that some people don't like isolators....that they can cause problems. I also built a 50 amp hour LFP battery which is in a battery box that I use for portable satellite operations. Since the charging profile is different, I don't think I can charge it in my car..... would have to find a charger for LFP batteries with a 12 v input. Any thoughts would be appreciated.