Another question on Converter sizes
There is another active thread regarding converter sizes, but I get lost in the wealth of detail offered here. I have a simple question: I have a PD 9200 , 45 amp converter, two Trojan T105 batteries ...
Forum Discussion
rtate wrote:
Can I expect my t105s to go from 11v to 90% charge in a couple of hours?
I think a couple of hours is extremely optimistic. I think 4 hours is a safer bet.
BFL13 wrote:
T-105s or any other battery should not be down to 11 volts! 50% is 12.1 volts.
A pair at 225 AH at 50% with a 45amp charger doing constant 45 will take about 85 minutes to get the batts to 75% , another 20 min to 80%, and another hour from 80-90. So total 50-90 will take about 3.4 hours. the 80-90 for an hour might not be worth the gen time, which is why many do 50-80s instead.
BFL13 is right on the money here. My batteries are a little smaller than 225 AH, but my wiring is a little smaller too. My 158 AH battery bank at 12.0v or 12.1v (50% SOC) takes right at 4 hours charging time over the 6g wire. I don't really know the final SOC, but I consider it done when the PD4645V drops its charge voltage from 14.4v to 13.6v. I call it 90% SOC, but that is an assumption on my part. I have never let it charge to that point then let the surface charge go to get a reading.
BTW, I am the OP on the other thread, the one where I was trying to decide if I wanted to upgrade from a 45 amp charger to a 55 amp charger. The solution was no. It would only save me about 20 minutes charge time, at best.
