Here’s an overview of what were doing: The main device is a LTE transceiver with PEP that hits double the suggested current (600ma) The 3.3v supply powers another MPU which does the sensor data collection and storage. The 1.8v supports ultrasonic transducers that measure open channel water velocity and wind velocity and direction. Hopefully in the future when Nordic has worked some issues we can drop the second MPU and run everything on +5 and 1.8v.
Two years ago I needed 3amps for the LTE M1 devices, all of them, some more than others but they all sucked power, was looking at 50 watt solar panels. with 10Ah sealed batteries.