Zareba 15 Mile Solar ESP15M-Z
#12 in Battery and solarFull review
A self contained solar charger for larger remote pastures with some weeds, for cattle, horses and goats.
Amazon $199.99$199.99
The Zareba 15 Mile Solar ESP15M-Z and the Gallagher S12 Lithium Solar are evenly matched, rated 2.6 and 2.6. The Zareba 15 Mile Solar ESP15M-Z leads on lightning cover. The Gallagher S12 Lithium Solar wins on warranty. The Gallagher S12 Lithium Solar costs $20 less ($179.99 vs $199.99).
Gallagher S12 Lithium Solar
#14 in Battery and solarFull review
A compact lithium solar charger for poultry, goats and short strip grazing fences, with a three year warranty that covers the battery.
Amazon $179.99$179.99
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 Zareba 15 Mile Solar ESP15M-Z for lightning cover (warranty covers lightning damage vs lightning damage not covered).
- Choose the Gallagher S12 Lithium Solar for warranty (3-year warranty vs 1-year warranty).
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 | Zareba 15 Mile Solar ESP15M-Z | Gallagher S12 Lithium Solar |
|---|---|---|
| Overall rating | 2.6/5 | 2.6/5 |
| Value 35% | 23 $1,111.06 per joule ($199.99, 0.2 J output) | 7 $2,249.88 per joule ($179.99, 0.1 J output, estimated from stored joules) |
| Output 25% | 29 0.2 J output | 11 about 0.1 J output (0.1 J stored) |
| Warranty 25% | 0 1-year warranty | 100 3-year warranty |
| Lightning cover 15% | 100 warranty covers lightning damage | 0 lightning damage not covered |
Specifications
| Zareba 15 Mile Solar ESP15M-Z | Gallagher S12 Lithium Solar | |
|---|---|---|
| Output | ||
| Power | Solar | Solar |
| Output energy | 0.2 J | about 0.1 J |
| Stored energy | - | 0.1 J |
| Rated fence length | 15 miles | 4 miles |
| Low impedance | Yes | - |
| Build | ||
| Battery | 6 V | - |
| Lightning cover | Yes | No |
| Warranty | 1 year | 3 years |