I had a 6 volt model, it bit the dust, but served well while it worked. I would suggest the 12 volt model, the 6 isn't hot enough for sheep and I can't vouch if the 12 is much better for them, but I imagine it is. Only once when we had weeks of dark gloomy WX did the battery drain.
We have a Dare brand solar 12v charger, it got me the other day and knocked me to the ground, I was unaware of what happened until I bounced off the ground!
So far all the animals have respect for those little wires.
I came back to add, the only down side to it is it needs 3 days of bright sunlight to fully charge the battery in it, ( it comes with the battery)
I have to stick with Jena here. I use both, and the solar and battery units are getting better, but the plugins will probably always be cheaper and more dependable. I restrict my solar to garden duty and temporary use, any long term location is plug-in if at all possible. I am using for preditor control, not containment, but I doubt that my oinion would change anyway. You just really seem to get more bang (or zap) with the wired units.
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