Hello all, hope everyone who is in the way of this hurricane is doing well and staying safe. Ok, here is my deal. I have been working on cleaning up and redoing some of my fence. I currently have a power wizard low impedance pm600 I believe. It says max output is 6 joules. The charger is 10 years old. I purchased a new Gallagher m800 with a max output of 8 joules. So, my fence checker does not read in joules it reads in Kv. So with old charger I am getting 2.4 Kv at charger and 1.5 Kv at the end of the line. With new more powerful charger I am only getting 1.4 Kv at charger and 0.2 Kv at the end of the line. I know I need to clean more off and plan on when storms are over this weekend. But why am I getting more power out of my old charger when the new more powerful one is putting out way less? I have three six feet grounding rods 6 feet apart. Thanks for your help.