Temperature Compensation--Battery or Ambient?
OK I have had my fill of why you need a temp comp probe to the battery casing or battery post (whichever one this week it is supposed to go on, the neg or the pos :) ) I understand temp comp and ag...
Forum Discussion
Hi JIDenver,
My sensors appear to change the voltage output in an analog manner. The colder the batteries get the higher the voltage the devices provide. That is how thermistors work.
On the Magnum, I have observed it in both absorb and float modes. I expect it applies to all modes.
Of course, overall capacity is affected too. At -40 my bank, when new, was designed to be able to operate a block heater via an inverter (50 amps @ 12 volts) for three hours.
At the temperatures mena is at capacity is quite a bit increased, but charging voltage needs to be moderated and lowered.
My first RV had but 30 watts of solar. Between trips that was sufficient to return the batteries to 100% state of charge. That is where a battery is happiest.
Leaving a battery below full charge will cause it to sulphate. If left long enough the sulfate hardens and there is permanent loss of capacity.
My sensors appear to change the voltage output in an analog manner. The colder the batteries get the higher the voltage the devices provide. That is how thermistors work.
On the Magnum, I have observed it in both absorb and float modes. I expect it applies to all modes.
Of course, overall capacity is affected too. At -40 my bank, when new, was designed to be able to operate a block heater via an inverter (50 amps @ 12 volts) for three hours.
At the temperatures mena is at capacity is quite a bit increased, but charging voltage needs to be moderated and lowered.
My first RV had but 30 watts of solar. Between trips that was sufficient to return the batteries to 100% state of charge. That is where a battery is happiest.
Leaving a battery below full charge will cause it to sulphate. If left long enough the sulfate hardens and there is permanent loss of capacity.
