Gallagher S20 Lithium Solar
#10 in Battery and solarFull review
A portable lithium solar charger for rotational grazing and small pastures, if you value Gallagher’s battery and warranty over raw output.
Amazon $289.99$289.99
2.6/5
A self contained solar charger for larger remote pastures with some weeds, for cattle, horses and goats.
- 0.2 JOutput
- 15 milesRated fence
- SolarPower
Check price at Amazon$199.99
Price checked November 2, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Rated for heavy weeds, unlike the smaller Zareba solar units
- Post mounted, all in one design with the battery included
- Lightning damage covered
Cons
- Only a 1-year warranty
- Voltage not published
- Barely more output than the cheaper 10 mile model
The Zareba Solar M-Z family
Every Zareba Solar M-Z model we rank, smallest first. Ratings compare each against its own power source.
| Model | Output | Rating | Price |
|---|---|---|---|
| Zareba 5 Mile Solar ESP5M-Z | 0.1 J | 2.6/5 | $129.99 |
| Zareba 10 Mile Solar ESP10M-Z | 0.1 J | 2.6/5 | $149.75 |
| Zareba 15 Mile Solar ESP15M-Z (this one) | 0.2 J | 2.6/5 | $199.99 |
| Zareba 30 Mile Solar ESP30M-Z | 0.5 J | 3.4/5 | $299.99 |
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 | ESP15M-Z |
|---|---|
| Output | |
| Power | Solar |
| Output energy | 0.2 J |
| Rated fence length | 15 miles |
| Low impedance | Yes |
| Build | |
| Battery | 6 V |
| Lightning cover | Yes |
| Warranty | 1 year |
Alternatives in this power source
Zareba 5 Mile Solar ESP5M-Z
#11 in Battery and solarFull review
A simple post mounted solar charger for a small paddock, rotational grazing strip or garden fence away from power.
Amazon $129.99$129.99
Zareba 10 Mile Solar ESP10M-Z
#13 in Battery and solarFull review
A good value self contained solar charger for a remote pasture or rotational grazing paddock with clean fence lines.
Amazon $149.75$149.75
Compare
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