Hi there, I am using a SmartSolar MPPT 75|15 and read in the specs that it has a temp sensor built-in. I tried to use it for a low temp cut-off but couldn't trigger it as an attached temp sensor is needed for this feature? (see also my video of my test https://youtu.be/S9qw9-SSplo?t=300)
Is this correct and why couldn't the built-in sensor be used for a low-temp cut-off if the temperate is already measured? Is it due to the heat that is produced by the charge controller?