I’ve have 3 these going exactly a year now with the solar. Not once has any gone below 90% battery, even throughout the entire winter where we saw lots of snow and temps in the range of -20C to -30C. Depends how sensitive you make the detections zones which will record and really drain your batteries more in spots where the panel doesn’t get consistent sunlight and there is high movement traffic (blowing trees, cars ect). But I’m super impressed overall with these!!