Check the fence as a system each week through winter, because cold, wet and frozen conditions attack every part of it at once: batteries deliver less, frozen ground earths poorly, snow weighs lines down and shortens the daylight that charges a solar unit. A fence that was strong in autumn can fade gradually through winter, and horses learn a weakening fence by testing it, so your checks need to find the fall in voltage before they do.
Test Voltage With a Tester, and Log It
Use a fence tester rather than a hand, a blade of grass or the sound of a click. Clip the tester to the line and read the voltage first near the energiser, then at the furthest point of the fence, because the gap between those two readings tells you whether power is being lost along the line. Follow the energiser maker's guidance for the reading your set-up should hold, and treat a falling trend as a fault to trace.
Log each week's pair of readings with the date, and test again after storms, heavy frost and snowfall, since those events change a fence overnight. A steady slide over three weeks is a battery, an earth or a short asking for attention.
Earthing in Frozen or Dry Ground
An energiser is only as good as its earth. Frozen soil and hard, dry frost conduct poorly, so a fence that earths well in a wet autumn can lose much of its effect in a frozen spell even with the energiser working perfectly. Inspect the earth stake and its clamp for corrosion, looseness and damage, and keep the connection tight and clean.
Where soil at the stake is frozen solid or dried out, follow the energiser maker's guidance for improving earthing on your set-up, which may involve the stake's position or added earthing, rather than turning the energiser up and hoping. Recheck voltage at the furthest point after any earthing work.
Power Supply Through Short Days
Check battery state more often in winter. Cold reduces what a battery can deliver, and a solar unit faces short days, low sun and panels dulled or covered by frost and snow. Wipe panels clear when you pass, confirm the panel faces the light it can get, and check battery terminals and leads for corrosion and secure connections.
Keep the energiser and battery sheltered from standing water, with cables routed so meltwater cannot work into connections.
Lines, Tape, Insulators and Shorts
Walk the whole line weekly. Snow and ice load tape and wire, sagging them towards the ground, and a line touching soil, a hedge or piled snow leaks power along its length. Clear fallen branches, lift sagging sections, re-tension lines, and cut back or clear vegetation that presses on the fence, including growth buried under snow that will short the line as the thaw wets it.
Use wide tape where horses rely on seeing the fence: pale, broad tape shows clearly against snow and in flat winter light, while thin, frayed tape blends into a wintry field. Replace insulators cracked by frost, since a line resting against a wet post through a cracked insulator drains steadily. Check posts for lean in ground softened by freeze and thaw, and straighten any that have let the line drop.
Work on the Fence Safely
Switch the energiser off before handling lines, insulators or connections, and confirm with the tester that it is off before you grip it. Tell anyone else in the field when the fence goes off and when it comes back on. Wear dry gloves, and never leave a section disconnected overnight without telling whoever turns horses out in the morning.
Finish each round by switching back on, testing at the furthest point once more, and recording that reading beside the week's earlier pair. Assigned in advance through KinsLe, the Care Teams list for this winter work can name one person for the round, the after-storm check and the final retest, so checks happen on schedule instead of when someone happens to remember.