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 is the better electric fence energizer overall, rated 4.9 to 3.9. The Parmak Magnum 12 leads on warranty and output. The Zareba 25 Mile Battery EDC25M-Z costs $1.20 less ($131.88 vs $133.08).
Zareba 25 Mile Battery EDC25M-Z
A strong battery charger for remote pastures and rotational grazing when you can swap a deep cycle battery every few weeks.
Amazon $131.88$131.88
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.
Which should you buy?
- Choose the Parmak Magnum 12 for warranty (3-year warranty vs 2-year warranty) and output (3.1 J output vs 1 J output).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every battery and solar electric fence energizer; a clear win is highlighted. How we rank explains each one.
| Factor weight | Parmak Magnum 12 | Zareba 25 Mile Battery EDC25M-Z |
|---|---|---|
| Overall rating | 4.9/5 | 3.9/5 |
| Value 35% | 98 $42.93 per joule ($133.08, 3.1 J output) | 72 $131.88 per joule ($131.88, 1 J output) |
| Output 25% | 94 3.1 J output | 68 1 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 25 Mile Battery EDC25M-Z | |
|---|---|---|
| Output | ||
| Power | Battery | Battery |
| Output energy | 3.1 J | 1 J |
| Stored energy | - | 1.3 J |
| Rated fence length | 30 miles | 25 miles |
| Peak voltage | 13.5 kV | 11.5 kV |
| Low impedance | Yes | Yes |
| Build | ||
| Battery | 12 V | 12 V |
| Lightning cover | Yes | Yes |
| Warranty | 3 years | 2 years |