On this page
On a cold evening the path lights glow for a while after dark, then fade before the night is done. Do solar lights work in winter? Yes, they do, but the short days and low sun leave the battery with less charge, so the light runs dimmer and goes out sooner. The sections below explain why winter cuts the charge and what to do about it.
SolarKitHQ earns a commission when you buy through links on this page, at no extra cost to you. As an Amazon Associate I earn from qualifying purchases. Affiliate disclosure.
Do solar lights work in winter?
Yes. A solar light charges its battery from daylight and runs the lamp from that charge after dark, and winter does not stop that cycle. What changes is the amount of daylight the panel sees: the sun stays low, the days run short, and cloud cover takes the edge off the light that reaches the panel. The battery still charges, but it charges less, so the lamp has less to draw on through the night. A light that glows all night in summer may go out before dawn in winter, and that is normal for the season, not a fault in the light.
Why winter cuts the charge
A solar panel makes its charge from sunlight, and winter gives it less of it in every way that matters. The sun rises late and sets early, so the panel has fewer hours of light. The sun also rides low across the sky, so its rays strike the panel at a slant and carry less strength than the high summer sun. Cloud and haze add to the loss by softening the light further, and short spells of clear sky between clouds do not make up the gap. The result is a battery that ends the day part charged, and a lamp that starts the night with less in reserve. Even a panel that faces open sky will gather less in winter than in summer, because the light itself is weaker and the day is shorter.
What snow and cold do to a solar light
Snow is the most direct winter problem for a solar light, because a panel covered in snow sees no sun at all. Even a thin dusting cuts the charge, and a crust of ice over the panel keeps the sun out until it melts or is cleared. Cold itself does less harm: a battery holds less charge in the cold and gives it up more slowly, so the lamp may look dimmer and run shorter, but the cold does not damage the light on its own. What damages a light is water that gets in and freezes, so a cracked lens or a loose seal matters more in winter than in summer. Check the lens and the seals when the cold sets in, and bring a light with a cracked lens inside until the lens is fixed.
Where to put solar lights in winter
Put the light where the panel sees the sun for the longest stretch of the day, with nothing between the panel and the sky. A spot that catches the morning sun and holds it through the afternoon charges the battery most, while a spot under eaves, trees or a fence stays in shade and starves the panel. Face the panel toward the sun at midday, and keep it clear of drifts where snow piles up after a storm. A light that sits in open sun in winter will outlast a light that sits in shade, even if they look the same in summer. Move a light that sits in shade to a sunnier spot, and the difference shows within days.
How to keep solar lights going through winter
Clear the panel after each snowfall, and wipe it clean when grime or salt spray dulls the surface. A soft cloth and plain water are enough, and the panel should be dry before nightfall so a film of ice does not form on it. Check that the light is on and set to the mode you want, since a light left off through a dark spell will not charge. See the how to clean a solar light guide for the cleaning steps. For snow on the panel, see the snow brush for solar panels. A panel kept clean and clear of snow gathers all the light the short day offers, and that is the best return for the least work.
When to bring solar lights inside
Some lights are better off inside for the cold months, and the sign is the lamp itself: if the light goes out soon after dark night after night, the panel is not getting the charge it needs where it stands. Bring the light in, charge it in a sunny window, and put it back out when the days lengthen. Lights that mark a path or a step are worth keeping out with care, while lights that only decorate a bed or a border can wait inside until spring. A light stored inside should be turned off and kept dry, and it should go back out with a clean panel and a full charge from a sunny sill.
FAQ: power away from the grid
Do solar lights work on cloudy winter days?
Yes, but weakly. A panel still gathers charge from daylight on a cloudy day, just less than on a clear day, so the lamp runs dimmer and goes out sooner. Lights that face open sky do better than lights under trees or eaves, and a clean panel gathers more than a dirty panel. See the solar lights for cloudy days for lights made for low light.
Should I turn solar lights off in winter?
Leave them on if you want the light, since the panel charges whenever daylight reaches it, even on short winter days. Turn a light off if you plan to store it inside, or if it has stopped lighting the path and you would rather let the battery rest until spring. A light left on through winter will not harm the battery, but it will run dimmer and shorter than in summer.
Can snow damage a solar light?
Snow itself does not damage the light, but the weight of snow on a stake light can push it over, and water that seeps in and freezes can crack a lens or a seal. Clear snow off the panel and the lens after a storm, and set stake lights where drifts do not pile up. A light with a cracked lens should come inside until the lens is fixed.
How do I get the most from solar lights in winter?
Give the panel open sun, keep it clean and clear of snow, and trim back anything that shades it. Face the panel toward the midday sun, and move lights that sit in shade to a sunnier spot. See the solar lights for low sunlight for lights that suit dim winter days.
Related solar guides
See every path, string and deck lights guide, the best solar lights for winter and the best solar pathway lights for winter.
