Yes, charging the Boxes permanently is no problem. The Boxes are designed to run permanently on mains power and there is even a dedicated circuit that makes sure not to damage the batteries. When running permanently on mains power, please use the provided power supply from the manufacturer Meanwell. Other supplies may interfere with the Track Box Passive, leading to reduced detection rates. You can also connect Solar Panels to your Track Boxes to run them permanently in sunny remote places. When using solar panels, please leave enough space between the solar panel and the Track Box not to cause interference.