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
The Gallagher S20 Lithium Solar is the better electric fence energizer overall, rated 2.7 to 1.8. The Gallagher S20 Lithium Solar leads on warranty and output. The Patriot PS5 Solar costs $174.99 less ($115 vs $289.99).
Patriot PS5 Solar
#15 in Battery and solarFull review
A small solar charger for garden, pet and poultry fences away from power.
Amazon $115$115
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 Gallagher S20 Lithium Solar for warranty (3-year warranty vs 1-year warranty) and output (0.1 J output vs 0 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 | Gallagher S20 Lithium Solar | Patriot PS5 Solar |
|---|---|---|
| Overall rating | 2.7/5 | 1.8/5 |
| Value 35% | 10 $1,933.27 per joule ($289.99, 0.1 J output) | 1 $2,875 per joule ($115, 0 J output) |
| Output 25% | 25 0.1 J output | 0 0 J output |
| Warranty 25% | 100 3-year warranty | 0 1-year warranty |
| Lightning cover 15% | 0 lightning damage not covered | 50 lightning cover not stated (neutral score used) |
Specifications
| Gallagher S20 Lithium Solar | Patriot PS5 Solar | |
|---|---|---|
| Output | ||
| Power | Solar | Solar |
| Output energy | 0.1 J | 0 J |
| Stored energy | 0.2 J | 0.1 J |
| Rated fence length | 12 miles | 2 miles |
| Rated area | 40 acres | 8 acres |
| Peak voltage | 9.3 kV | 7.4 kV |
| Low impedance | - | Yes |
| Build | ||
| Battery | - | 4 V |
| Solar panel | 3 W | - |
| Lightning cover | No | - |
| Warranty | 3 years | 1 year |