This is a significantly longer operating period than is possible with the 6- to 10-amp-hour internal battery typically included with most packaged solar energizers.
Not only that, but using a fence energizer powered by a solar-charged battery will also offer greater flexibility in placement on your property, allowing you to put the unit where needed without any consideration for a grid connection.
A solar fence energizer has a low power drain on the battery because the output power is pulsed on and off, rather than remaining continuously energized.
The three disadvantages of using a solar-powered electric fence energizer include the need to locate the solar module where it will receive lots of sun; the higher cost; and the occasional replacement of the battery.
It will require replacing your 120-volt AC energizer with a self-contained solar energizer with its own battery and solar module.
After placing or mounting the solar energizer, position the solar module for maximum performance--typically with the module's face oriented either due south or southwest.
If you plan to assemble your own custom system, make sure your fence energizer is designed for the voltage of the external battery you want to use.
When selecting a solar module to keep your energizer battery charged, make sure it's rated for 12-volt charging.
The ground rod is typically a copper-clad steel rod driven into the earth next to the energizer.