Parmak MAG12-UO 12-Volt Magnum Low Impedance Battery Operated 30-Mile Range Electric Fence Charger; Weatherproof, Indoor&Outdoor; Ideal for livestock or predator control; 3-YR Warranty (MADE in USA)

This thing works great. I have it connected to a battery bank, charged by a solar panel. It output voltage is much higher than other fencers. I could hear an audible 'snap' when one of our lamb touched it while grazing. Spotted a black bear near the pasture a few days ago. I believe this unit delivers enough voltage to deter a bear too. Our pasture is small. 1/2 of an acre. The furthest point away from the ground connection I measured 10,500 Volts with my digital fence tester. We have shallow ground (12 - 16 inch deep soil) before limestone. For a ground rod, I used a 10 foot piece of 1/2" copper pipe. Dug a trench 10 feet long, and 16" deep (bedrock) and lay the pipe horizontally. I ran 3 strands of fencing wire,,, the yellow plastic type, with 3 aluminum conductors,,, about 1800 feet of wire. The meter on the front of the unit is helpful, showing the fence status. With 1800ft of wire, the fence status is almost at the max position, meaning very strong, high voltage. I run the bottom wire 6-8 inches from the ground,,, I see some grass touching it,, but am still getting 10.5 KV furthest from ground. You should see the lamb leap in the air when they 'take a hit'.

I was looking for a DC charger that would keep the deer out of my garden. I have no AC power in that area. Before I purchased this charger I had tried several others but they were to weak. This one looked to have the power but had complaints about moisture and corrosion on the internal electronics. I ordered two chargers and when they arrived I noted that they had good strong cases. To guard against internal moisture I took some form-a-gasket used for autos and sealed the seams on the case as shown in the photo. I did not open the case. I just ran a bead and used my finger to spread it for coverage. I am on my second year and have had no issues with ether charger. I do have them simi covered from direct rain but they can get some moisture on them. They give a strong jolt and I have had no issues with deer in my gardens. I would buy again. I use the fiberglass electric fence rods from Tractor Supply to run the wire for the fence. For the battery I purchased a Marine/RV for power. They can be discharged further down that a normal car battery without harm. 5-9-2024 UPDATE Both units still fully operational with no issues.

Update (November 2024): I ordered another of these fence chargers on October 24, but it was never delivered to me. An email message on November 4 indicated that the package was returned by the carrier and that a refund would be issued. No other explanation was provided for the failure to fulfill this order. This product is very good, but I would recommend ordering it from another source. I purchased one of these fence chargers late in 2018, and have been using it ever since to power around 4000 feet of fence with good results. We have a bull who was leaning on our barbed wire fence and even sticking his head through to "argue" with the neighbor's bull, but that all stopped after we installed a single strand of hot wire just inside the barbed wire fence. I really like the gauge on the front of case that provides an indication of the status of the system. From time to time the hot wire will get tangled with the barbed wire fence when deer jump over, and the gauge shows when the electric fence has gotten grounded on the metal fence. I simply locate the point where the hot wire is hung up on the barbed wire and pull it off. Having the hot wire grounded in this way does not appear to harm the fence charger at all. I used a 12-volt battery to power this fence charger until a couple of years ago, and now it is powered by a 12-volt power supply that is plugged into a 120-volt outlet. Both methods work well, but it was inconvenient to keep the battery charged up all the time. I drove in one 8-foot ground rod next to the fence charger and that seems to be working well enough for the grounding connection. Many recommendations call for three ground rods spaced 10 feet apart, but we're getting by with only one so far.

Arrived on time, solid unit, easy to set up and install, I love the built-in meter and switch. I have only had this installed for a few weeks but it is working great for a solar powered setup in a remote area for a beeyard. It is powered by a marine battery I picked up at Canadian Tire which is charged by a solar panel.

This is the standard for solar fencing. Used it to power over half a mile of single strand Polly and I can confirm that even at the end your getting quite the zap. Never had any power down issues. Built my own system with a 10a panel, deep cycle AGM lawn mower batter and a plastic batter box. Worked great.