Putting together my 48v off-grid system, and have discovered that my all-in-one inverter/charge controller doesn't have low-temp cut-off, and two of my batteries also do not have low-temp cut-off. Obvs I will need to solve the low temp problem. First stage of the plan is some heat mats in the battery compartment, but obviously if I have enough dark days in a row--especially if I'm not home--they will drain down and then will be in danger of charging in the cold, so I need an external low-temp cut-off as well. Is this something that could be done with a thermostat and a relay? I'm looking for something dead reliable, as I don't fancy re-buying batteries if I can at all avoid it.
Anyone have experience with this from the days before batteries were building these things into the batteries themselves?
Anyone have experience with this from the days before batteries were building these things into the batteries themselves?
