Parmak Magnum 12
A rugged, efficient battery charger for remote pastures and predator control, with a long lightning covered warranty.
Amazon $133.08$133.08
The Parmak Magnum 12 rates 4.9 among battery and solar electric fence energizers; the Zareba 75 Mile AC EAC75M-Z rates 3.9 among plug-in ones. The Parmak Magnum 12 costs $75.59 less ($133.08 vs $208.67).
Zareba 75 Mile AC EAC75M-Z
#5 in Plug-inFull review
A strong value for large pastures and perimeter fences with bulls or predators, where weeds would drain a smaller charger.
Amazon $208.67$208.67
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Scores side by side
These two sit in different power source classes (battery and solar and plug-in), and each is scored against the reference points for its own class, so a rating says how well each does among its own power source peers. How we rank explains each factor.
| Factor weight | Parmak Magnum 12 | Zareba 75 Mile AC EAC75M-Z |
|---|---|---|
| Overall rating | 4.9/5 | 3.9/5 |
| Value 35% | 98 $42.93 per joule ($133.08, 3.1 J output) | 64 $52.17 per joule ($208.67, 4 J output) |
| Output 25% | 94 3.1 J output | 69 4 J output |
| Warranty 25% | 100 3-year warranty | 50 2-year warranty |
| Lightning cover 15% | 100 warranty covers lightning damage | 100 warranty covers lightning damage |
Specifications
| Parmak Magnum 12 | Zareba 75 Mile AC EAC75M-Z | |
|---|---|---|
| Output | ||
| Power | Battery | Plug-in (110 V) |
| Output energy | 3.1 J | 4 J |
| Rated fence length | 30 miles | 75 miles |
| Peak voltage | 13.5 kV | - |
| Low impedance | Yes | Yes |
| Build | ||
| Battery | 12 V | - |
| Lightning cover | Yes | Yes |
| Warranty | 3 years | 2 years |