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
4.1/5
A powerful battery charger for large remote pastures and rotational grazing, ready for a solar panel when you add one.
- 1.9 JOutput
- 50 milesRated fence
- BatteryPower
- 10.4 kVPeak voltage
Check price at Amazon$195
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Nearly two joules from a 12 V battery, enough for a big remote pasture
- Can add a 20 W solar panel later to keep the battery topped up
- Two year full replacement warranty
- Warranty covers lightning damage, per the label on the unit
Cons
- Battery and panel not included
- Without a panel the battery needs regular recharging
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its power source. How we rank explains each one.
Specifications
| Model number | 818352 |
|---|---|
| Output | |
| Power | Battery |
| Output energy | 1.9 J |
| Stored energy | 2.7 J |
| Rated fence length | 50 miles |
| Rated area | 165 acres |
| Peak voltage | 10.4 kV |
| Low impedance | Yes |
| Build | |
| Battery | 12 V |
| Lightning cover | Yes |
| Warranty | 2 years |
Alternatives in this power source
Parmak Deluxe Field Solar-Pak 6
A made in USA solar charger for small to medium remote pastures, with three years of lightning cover.
Amazon $259.99$259.99
Gallagher MBS400 Multi-Power
For ranchers who want one powerful charger that can move between a barn outlet and a battery at a remote pasture.
Amazon $570$570
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