BFL13 wrote:
I do in fact adjust the charging voltage for temperature, so that when camping in February and ambient is 35F, I will set 15.2 instead of 14.7 as in July. The adjustable voltage PowerMax "LK" line of converters lets you do that manually.
My old VEC1093DBD portable charger has built in temperature comp and you can see it working when it operates at higher or lower voltages.
Neither compensates for battery internal temperature though, just ambient.
The AGM guides insist upon temp comp. If you set the spec 14.4 (for 77F) in February at 35F, you will be undercharging the AGM, with no way to see the SG failing to rise to the right amount.
With temp-comp charging, you do not manually set the charge Voltage.
There is no point in discussing SG with AGMs.
If you will read through my linked topic you will see that I use the .5% rule when charging. Float is optional and NOT a valid charging Voltage. You must eventually apply
charging Voltage until the .5% rule is achieved.
My solar chargers will repeat and lengthen ABS daily as necessary until the .5% rule is done. I have graphs that show when the solar is falling behind and that is when the genny is used. Charging can be spread out over days within limits.
HTH;
John
