I have been successfully running several Sodaq One v3 boards with a 0.5 W solar panel for over a year now. I am monitoring the weight of beehives at several locations in Berlin. I use the Sodaq Universal tracker software with LoRaWan via own TTN gateways. The systems run perfectly autonomously (even over the winter) with update rates of every 5 minutes, GPS fixed once in 24 hours.
Now I also have to monitor hives around Berlin. For this purpose, I have procured Sodaq AFF boards and operate them via NBIoT (Vodafone EasyConnect). Same software, update rate throttled to every 15 minutes.
Unfortunately, this board consumes much more power and I can not (even now in nice weather) keep the battery charged. After approx. 5 days the battery drops below 3.5 V.
I am grateful for any idea. Should it work with the Sara AFF?