Which MAXIM™ Electric Fence Energizer Do You Need?

MAXIM™ Power & Simplicity

Choosing the MAXIM™ electric fence charger (fence controller) with the power for your application is simple. Add together the lengths and types of fence that eventually need to be operated* on one fence energizer (fence charger) and refer to the guide below or to the label. The first number of the model name is the length of cattle fence overgrown with vegetation for which each charger is rated (see note below "Maxim Guide"). The second number is the length of clean well insulated wire and both are in miles (1 mile = 1.6 km). The length of overgrown sheep fence, goat fence, hog fence, and wildlife fence is also listed. It makes choosing fence energizers much easier. The first number is also the approximate number of ground rods needed for maximum performance.

"Guaranteed To Go The Distance"*

MAXIM™ Fence Chargers Easily Power Fence Through Weeds And Grass

Top - Three strand cattle fence with heavy weed load
Bottom - Five strand all electric for sheep and cattle

* "operate" means to maintain 1500 to 2500v on dry cattle fence and 2000 to 3000v on 1/3 as much dry sheep, hog, or wildlife fence in areas with about 40 inches (100 cm) annual rainfall and without ground wires; "wire" means 14 1/2 gage (1.6 mm) or larger.

* "Guaranteed To Go The Distance" means a charger will perform as specified herein, if the charger is installed correctly, or the energizer will be replaced or it's sale price will be refunded by the seller upon its return.

MAXIM™ Line-Operated 110 Volt Energizers Selection Guide

In the guide, "cattle fence" means up to three hot wires on insulated posts with the bottom wire 15 inches (38 cm) or more off the ground and other wires not grounded. For other fences with low hot wires (5 to 10 inches or 12 to 25 cm), less than half as much fence can be operated on the same charger. It is best to choose a more powerful energizer if there is old fence wire trash nearby or "ground wires" in the fences which reduce the length of fence that can be operated.

Free Shipping on all Energizers

Dual X100 and X150 12v Battery or 110v Line-Operated Energizers

Economy 110v Line-Operated Fence Charger

Voltmeters, Lightning Arrestors, Energy Limiters, & Warning Signs


All MAXIM™ brand fence energizers (chargers & controllers) are made in America ( except the B 6 Portable and Dual X100 which are made in England) and use modern digital power technology with a special integrated circuit chip to develop and control the pulse. Instead of the conventional analog type voltage doublers with rows of capacitors, MAXIM™ fence chargers switch alternating current off and on many many times per second through a transformer. Less heat is produced, fewer components are needed, and more exact control is possible. All this leads to more power, lower cost, and longer life.

In addition, MAXIM™ high voltage output transformers are designed to provide the maximum power on the fence when it is needed, that is, at heavy load conditions. That's why MAXIM™ fence energizers operate long lengths of fence with heavy vegetation loads and still shock with enough power.

Automatic Reset Circuit

The MAXIM™ line-operated plug-in fencers (except the X100) are equipped with a safety shutdown feature to control overpulsing and with an automatic reset circuit to restart the energizer. The safety feature is intended to stop operation if the charger should begin to pulse very rapidly. Some "high frequency" interference such as large sparks and lightning, especially on high voltage power lines, can also trigger the shutdown feature. Unlike non-digital control fence chargers, the MAXIM shutdown is automatically reset by a special circuit built into the energizers so they require less service and have less downtime.

More Power For The Money™

Best of all MAXIM™ fence energizers just cost less, a lot less. Tests conducted at the facilities of major agricultural universities in the United States have shown that the cost per mile of overgrown fence that can be operated on each unit is much lower, in fact, 20 to 50 percent lower, depending on energizer brand and charger model.

Backed By Thirty Years Of American Experience & Service

Thirty years of electric fence experience with American conditions and American high powered electric fence styles have produced a base of fencing knowledge and expert advice for the best customer service. MAXIM™ fence energizers are backed by a two or three year warranty that even includes lightning damage. Best of all, they are backed by a company and authorized dealers across the country that have provided prompt dependable service since 1978. Energizers are normally repaired in one business day.