Really nice installation! Both your fence and @AndySmith charging system. This same general (but much smaller, more "homesteady) set-up has worked well for us. Our electric fence is solar but runs from a buried wire from an outbuilding with a panel/inverter/battery system. Here’s a description from an older “electric fence materials” thread (Electric fence material - #9 by DanBlass):
“We have two electric wires, both hot. The bottom one is on a 2” insulator at 48". About 8" above that one is the second wire on a 4" insulator. The thought is if a racoon somehow “steps” or reaches over the first wire they’re more apt to hit the next wire being out a bit farther. They’re both on a 6 ft fence which is the ground. Poultry netting on field fence or 2"x4" welded wire fence up to the wire, field or poultry fence above. We have old and new fence surrounding our acre garden/orchard. Old is on cedar posts and that area has some wire or rebar “staples” over the bottom fence wire into the ground, just for insurance for good ground. The new fence is on steel posts so that part is well grounded. There is a wire from the fence to a regular ground rod at the fencer (regular farm fencer).
For years the bottom electric was at 2 ft and that was a real pain keeping the weeds/grass down to keep from shorting out the fence. When we expanded and redid our fence this spring we put the bottom electric wire at 4 ft and that was a whole lot better. This has worked well. Confirmed, unfortunately, last month when our dependable mouser cat decided to climb a fence post up and over instead of waiting for me to open the gate. Now she won’t go anywhere near the area. Sue. "