Here is a SECURITY PACKAGE designed for RV's. It will automatically contact you and you can even log into the base unit and check the status or your RV (battery, temp....)
How will RV Command protect my RV?
RV Command will help you protect your RV against:
Unauthorized entry
Low battery voltage
GPS tracking
Geofence
Low or high interior temperatures
Unintended shore power disconnections
RV Command will instantly alert you the moment an event happens with your RV!
All you need to do is hide the base unit, connect it to your battery and wait for the test message.
If you are concerned about your RV, this may even let you sleep at night
https://rv-command.com/
I would add a small SOLAR panel to power it and keep the batteries topped off.
Don
My Registry
RVing with SOLAR