An incredibly hot and effective fencer is a Parmak 30 mile. Mine tests out to 13,000 volts. The 12 volt version will run for 30 to 45 days on a group 24 deep cycle battery, as long as weeds don't short it out.

For temp fences, use 1/2" poly tape, and use the step in posts. Bottom 3 positions. The poly tape can be tensioned up by hand. If it is a 50 foot run or larger, set steel posts on the corners with donut insulators and tape will roll thru the turn. And even with all that, bait the fence for coons. I put fish oil laced cat food in a tin can.

A parmak charger would be more then adequate for most garden fences, but on the hot scale a parmak 30 mile fencer isn't that hot. A really hot charger on a garden size fence could potentially make things hot it wasn't attached to.

I ditto HayDay and Okie Farmer. The best on the market in my opinion.

I had a smaller charger I think it was 1.5 joules. With the fence inside of a fence it did good keeping deer out, Didn't slow the coons down at all. Got a 6 joules and it worked much better but still not 100%. I run 3 strands on the inside fence with the bottom strand about 2" and the 3rd. about 4~5". Last year I did not lose any sweet corn. Trapping & taking every opportunity I get to keep the population in check is what worked for me. Hopefully it works again this year.