Are solar trail cameras worth it? It depends on which way the camera has to face

The short version

Solar on a trail camera does one thing: it removes the battery trip. It does not make the camera faster, sharper or better at night, and on a cellular camera it does nothing about the plan. So the value question reduces to a simple comparison: what does the trip cost you, and will the panel actually get the sun it needs?

If the answer to the second half is yes, solar is one of the best-value upgrades in this category. Spypoint claims its integrated panel and battery “replaces up to 1,000 AA batteries,” and while that is a maker claim rather than a measurement, the direction is right: a camera that never needs cells is a camera you stop thinking about.

The battery bill it replaces

Put real numbers on it before you decide. Independent testing puts the longest-running cellular camera in our registry at about fourteen months of photos on twelve lithium AA cells, and the best card cameras at roughly thirty months on eight. So a cellular camera on lithium primaries costs you one tray of twelve cells a year, plus the walk; a card camera costs you one tray of eight every two to three years.

That is the honest frame. On a cellular camera, solar replaces a yearly battery purchase and a yearly trip — genuinely worth paying for. On a card camera that already runs thirty months, solar replaces a trip you make once every two and a half years, and you have to visit the camera for the card anyway. That is why integrated solar is overwhelmingly a cellular-camera feature, and why on card cameras it makes most sense on a camera running video or time lapse, where runtime collapses to three to six months. The measured figures are in best trail cameras for battery life.

The integrated-panel problem

Every integrated-solar camera in our registry has the panel moulded into the front of the housing, above or around the lens. That is tidy, weatherproof and theft-resistant. It also means the panel and the lens are rigidly coupled: whatever direction you need the camera to watch, that is where the panel faces.

On a field edge or a plot where the camera faces south or west, this is a non-issue and the camera will run forever. On a trail in a north-facing hardwood bottom — which is where a lot of good sets are — you are asking a small panel to charge from skylight under a canopy. Those are the cameras people report dying in November, and the camera is not at fault.

What winter actually does

Three things change at once, and they compound. Daylight hours fall by about a third in the northern half of the country. The sun sits lower, so light arrives at a shallow angle to a vertically mounted panel and much of it reflects rather than converting. And snow sits on a flat or shallow panel until it melts, during which the camera is running entirely on stored charge.

The practical consequence is that a solar set which coasted through August can run down in January even though nothing broke. If your sets are in snow country, size for stored capacity, angle any panel you can angle steeply so snow slides off, and keep a charged spare pack in the truck. The cold-weather picks and the battery chemistry table are in best trail cameras for cold weather and batteries in cold weather.

When a separate panel is better

Almost always, on a shaded or awkward set. A separate panel on a cable can go up the trunk, out to the edge of the canopy gap, or on a fence post in full sun while the camera stays where the animals are. Spypoint's SPLB-22 is a 10-watt panel with a 15,000 mAh battery and a mounting bracket and strap, which is the shape of thing that fixes a problem an integrated panel cannot.

The trade is three-fold: a cable to hide, another object to steal, and a camera that must have the right input. A 12-volt jack is the most useful port here because it accepts panels and battery boxes without adapters, and four of the five Browning bodies we rank have one. The full panel comparison is in best trail camera solar panels, and the fixed-supply alternative in 12V battery boxes.

One genuine warning on mixing the two approaches: GardePro advises against using its SP350 panel with cameras that have built-in lithium packs, naming the R3 Pro, E8 2.0 Pro and X66 series, because of idle power draw. Check the maker's compatibility note before adding a panel to a camera that already has an internal pack.

Two cameras and two panels

The four mistakes that kill a solar set

• Mounting the panel at the camera's height. Put a separate panel higher than the camera, where the canopy is thinner, and run the cable down the trunk.
• Mounting it flat. A steeply angled panel sheds snow, rain and leaf litter and faces a low winter sun more directly.
• Aiming it once, in August. Re-aim any aimable panel in late autumn. The sun is in a different part of the sky.
• Treating solar as a substitute for capacity. A panel keeps a battery topped up; it does not carry a camera through a cloudy fortnight. Size the battery for the worst week, not the average one.

And one that is not about sun at all: a panel is a visible, valuable object hanging in a tree. On ground where theft is a risk, a solar camera advertises itself twice over. Box it, cable it, and read how to keep a trail camera from being stolen.