I need to monitor the battery temperature at remote sites. Here is a picture of one of the sites
The equipment is in the white box below the solar panel, The battery is in the black box at left of tower base. That box is being changed for and insulated box which will be placed in the ground. I need to monitor the battery temperature. The battery will have a heater on it, but want to monitor the temperature and switch the heater in and out.
Here is a image of the inside of the equipment box
The MPPT 75/15 carries the system well, but with the advent of winter we need to get the battery protected. I am trying to figure out what else I need to monitor the battery temperature
Here is a drawing of the solar parts in the box. The RPi is powered by a 24v to 5v PSU
What I am trying to figure out is what I need to add in order to monitor the battery temp. It will need a cable about 6ft long to reach the battery box below. BLUETOOTH and WIFI will not work, these are metal boxes. And the battery will end up underground.
