Semi-permanent fences are designed to stay in the same place for up to a year or two. They are best used for horses, outdoor pigs, poultry, or to protect a new crop planting from vermin.
For best stability corner posts, gateways or sharp bends in the fence would consist of wooden posts. These should be very firmly installed and suitable insulators used with softwood posts. In-line posts could be either plastic or steel and the conductors could be tape, rope, nets or stranded steel wire.
Energizers should be mains powered when there is a convenient power supply. Alternatively, 12-volt wet battery energizers are a good choice. They are portable, although heavier than internal battery energizers, and they can operate longer fences more effectively than 6-volt and 9-volt energizers.