Looking to deploy the Sparrow gateway (Notecarrier A + essentials board + Notecard LTE-M) in harsh environment for an agri type of prototype, looking for recommendations for suitable solar panel and lithium battery max capacity especially for those days without much sunshine (summer temperature of about 35c or around 100F and winters approaching -15C or 5F in the open fields)
if anyone has successfully deployed a similar solution in the wide range of cold and hot environments as mentioned above, that would be very helpful.
Hard to answer your questions without knowing the operational parameters, in particular how much current draw there is.
We use the Notecard with Notecarrier-F and ESP32 Feather with 4-20ma inputs and RS-485 comms for monitoring in oil and gas applications, our monitor is mounted on storage tanks and are exposed to the same temperature extremes you mentioned.
We use the 4400 maH Li Po battery (Lithium Ion Battery Pack - 3.7V 4400mAh : ID 354 : $19.95 : Adafruit Industries, Unique & fun DIY electronics and kits) and a 2 watt 6 volt solar panel from Voltaic Systems (https://voltaicsystems.com/2-watt-6-volt-solar-panel-etfe/).
In our application, the electronics is in deep sleep mode most of the time. The electronics wakes up every hour, collects the data, syncs with Notehub and then goes back to sleep.
This setup has handled 2+ weeks of heavy cloud cover at temperatures between 30 - 40 F with discharging the battery. It has also performed when temperatures have been below freezing for several weeks at a time. Don’t have a lot of experience at below 0F.
Hope this helps,