I know I'm a lot smaller than most of you but I maintain about 5 miles of hot wire - - - I went thru 3 Gallengers before I gave up on them. The day I threw the last one away the biggest charger TSC had was a "Holdem" and it came with a ( storm guard ) lighting arrester.
This was at least 10 years ago and probably more like 15 - - - When I hooked it up it has a no load voltage of 8,000 volts but when I went to the south end of the farm I was only getting around 2,000 volts, put in a second ground rod and upped it to 5,000 volts, third ground rod and now it is 7,000 volts at the south end ( about 1 mile away ) All of my ground rods are copper clad steel from REMC and 10' long spaced about 15' apart and 2 of them are below the down spouts of the workshop.
This charger is rated at 12.5 joules and makes a believer out of the cattle but the dogs figured out you can listen to the fence and hear the pulses so they would hear a pulse then run thru without a shock.
Being as I raise German Shepherd dogs I then bought a Stinger charger - - - only puts out 2,000 volts and 1/2 joule but it is on constantly so I have a white rope wire around the bottom of the 3 acre yard and the dogs respect it.
If you can see the top 2 wires are hooked to the big charger and the bottom one is hooked to the Stinger
I don't know who makes this charger but I have never done anything to it since I hooked it up - - - with moderate weeds I still get over 5,000 volts at the south end and the deer can lay large sections on the ground and still get about 3,000 volts - - - If it is trouble free and dependable I like it no matter what name it has.
Would this cover the ground you guys have? I don't know but on 300 acres it is doing a great job.