Thor Forums

[dkoldman]

I will give my battery Mfg for AGMs (vMax Tank) a call this week. I will see if I can get their take or recommendation on what is optimal voltage for any specific temperature. This may actually be a range. I assume the duration of the preferred charge still be determined by the battery's usage or lack thereof.

At the moment from what little research I have done, I don't see how my current PD2000 Charge Wizard could ever over apply any voltage unless the converter is running and battery is over 120F.

Let's say I am boondocking in the middle of the desert right next to the Duck's house with daytime ambient temperatures well above 110. I could simply adjust my Quiet time so the genny ensure my batteries are fully charged during periods it is not optimum to charge batteries, and if I must have my ACs running, I can simply turn off the Converter at the breaker.

At this time; I don't a significant gain or benefit when temperatures are cooler. Sounds like the more voltage the better and my unit max voltage is 14.4 volts. During cold nights if I had the Remote Pendant, I could ensure my charge is always sustained at 14.4vdc

FWIW; It is 101F ambient temperature where I am now, ACs are running and coach is at 80F inside, the batteries which are under the steps; but under a cooled floor is 97F

My converter is putting out only 13.6VDC before it knows the AGMs are well over 90% fully charged. Should it get hot enough where my batteries reach 120F, I agree it is not optimum to be charge batteries and I will stop that albeit manually.

This is akin to my Ryobi chargers. They will not start to charge if they detect excess heat from the battery pack. I just got lucky as they came that way from Ryobi.