Are you using rechargeable batteries? If not, one should be.
I am using non rechargeable AA batteries in my trail cameras with the cameras
set to 30 second video with one minute delay. The larger the SD card, the more
power it takes to fire them up and the more megapixels show up for a higher quality
video. When new, these batteries test 1.55 volt using a digital meter. Rechargeable
batteries when put on a charger alone, very seldom come up to a full charge as they
are advertised.
I have used Lithium Ultimate AA batteries which test 1.79 to 1.83 volt when new.
The problem here is when the voltage drops to approximately 1.55 volt, the cameras
shut down where as this is the starting voltage of alkaline batteries. Lithium are
advertised for cold weather.
I am not using solar panels due to them being too easy to spot if some one is looking
for trail cameras etc.
If trail cameras are set up over baits, one can receive a lot of pictures. If trail cameras
pick up movement of waving grass or tree leaves one can get a lot of unwanted pictures
and or videos. I carry a SD card viewer so am able to check that the camera is functioning
and set at the proper angle or direction. All cards are swapped out each time the cameras
are checked.
Trail cameras facing the rising or setting sun or later in the year where the arc of the sun
is lower in the sky, results in poor quality pictures and or videos.
As a trial, one winter I used 12 volt batteries, the same as used in a ride on lawn tractor,
wired externally. Some trail cameras have this option. If squirrels were in the area, one had
to hide the small wires as the squirrels would chew on them.
These batteries were set on a small piece of plywood so they would not freeze to the ground.
The voltage could drop to approximately 6 volt and the cameras would still work.
My cameras usually get checked every two to three weeks but now with the higher cost of fuel,
they do not get checked as often. 45 miles one way to a property and 55 miles one way in the
opposite direction to my other property. Cameras are used to monitor wild life as well as security.
Wishing you all the best.
Take care.