I have a question about grounding an electric fence charger I recently bought a Parmak 25 mile range solar charger. The instructions say to put 3 6' galvanized ground rods 10 foot apart. I have a standard 30 mile charger that's just using one ground rod and it seems to run just fine. Most setups I see around other farms are also only using 1 ground rod, so I guess my question is what's the downside of using 1 grounding rod vs the 3 like the instructions say? I'm just using this for one short run at the top of a fence to keep a bull in.