For additional data and safety, many people choose to install temperature probes inside the battery banks. The probe should be installed on the side of a battery, below the liquid level, preferably on a unit in the centre of the bank. The main factor to look for is maximum temperature. The battery bank should not exceed an operating temperature of 52ºC / 125ºF.
**Mount sensor directly to side of the cell, below liquid level. On dual-container models, the sensor should be mounted directly to the inner cell jar, not the outer case.**
Sensors should not be mounted to the top of the battery case/cell or terminal as this does not provide an accurate temperature reading of the electrolyte.
See infrared temperature shown below -