Here we can see the base station battery slowly dropping Bat Voltage during the cold winter – and when the temperatures are below zero it can not charge the battery. After mid feb the temperatures are above zero and the solar charging is working well – bringing the battery back to 100% (around 4V). This means we did the right things to make it work through winters!

The Fjalls tracker has restarted – perhaps uprighted itself – and data is now coming in daily again. The gap in the data shows that it coul not create accurate readings then – which could also be due to a problem with its base station..

https://data.glacsweb.info/iceland/tracker/plot.py?imei=300434062961640