Do you have any recommendations for solar chargers?
If you value maximum convenience and quick easy setup and takedown, I would probably go with a battery unit like this: https://www.premier1supplies.com/det...1667&cat_id=0&
It will at least equal the performance of the Zareba unit and your net cost wil be less. it's not solar but the battery will power the fence 80 days on a single charge and you probably won't camp that long.
If you want something a little more powerful, but still relatively convenient, I would go with one of these. in fact, this is what I will probably buy for this summer when I start moving my cattle around: https://www.premier1supplies.com/det...297&cat_id=171
If you go much more powerful than that, the ground rods need to be longer, and would be pretty inconvenient to drive in a 6' ground rod every time you moved your fence. The second unit has an integrated solar panel. The kit includes the wiring harness, ground rod, a 110v recharger for the battery (very useful to extend battery life when the unit is not in use) and even a fence tester. which will help you sleep at night.
Whatever you get, be sure and set it up at home so both you and horse are comfortable with the arrangement before you get to your event.
I love my local Tractor Supply and Fleet Farm stores, but a lot of their electric fence products are built to a lower price point to avoid frightening away potential customers. In the long run, I've found the stuff from Premier to be a better buy.