100 amp charging source vs 2 grp31 AGM
My friend plans on running an obscene stereo in his new box on wheels acquisition. He wanted a dedicated power source for it able to power it for a respectable amount of time from battery power alo...
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The AC input line voltage is the likely factor in not getting 100 amps from it. The unloaded source closest to breaker box was reading 117.9vAC, and the 30' extension cord to powermax is of dubious quality, and great age, and that is plugged in at a greater distance from panel.
I knew this was not ideal for the test, but where the batteries were set up already, the easiest AC power option was used, not the Ideal.
Next load test we will move the Vac input closer and measure what it is when the Powermax is maxed out.
We are using 0awg cable from powermax to batteries, 4 feet one way.
We reduced the stranding to just big enough to fit under set screws, and we tinned it. Very round, very tight fit with maximum surface area. The output terminals barely get warm. Their connections at the batteries barely get warm.
Amps began tapering at around the 45 minute mark. I missed the exact moment it began tapering. It was reading 75 amps at the ~1 hour mark.
At the ~ 1:30 mark it was down to 22 amps.
Bench temperature 66f, battery temp 81F at the 1:30 mark. 14.72v at battery terminals.
The powermax fan shut off at 40 amps and only comes on sporadically after that, at full speed.
The owner wants to add another 80Mm fan for a push/pull airflow scenario, but mostly because he has a box of 80MM fans salvaged from other equipment he wants to make use of.
As far as tinnitus goes, what joy it is!
I also have Surfer's ear which is basically the skull closing over the ear canal from too much wind and cold water in the ear canal over the last 30 + years.
I've had one ear operated on. They use fine chisels and then a grinder to hack away the bony growths. I need the other ear done too, but when this occurs is another matter.
This stereo is more about sound quality than absolute volume. Underdriven speakers distort easily at higher volumes. I don't see the actual desired volumes really requiring more battery capacity, but it is really an unknown how much the amps will draw at the desired Max volume level, much less the average volume level. But we will have Ammeters on both charging sources and inline on stereo cabling.
The owner of project vehicle is in his mid 60's, and is now grasping the concept of how batteries charge. With the data points we are recording as amps taper, I will make a graph showing the tapering and we can then better estimate how much time to set the timer for, and help to fill in the blanks regarding the charge acceptance profile.
I will update when there is more data to add, but don't hold your breathe. The project vehicle is having fuel delivery issues which take precedence, well before installation of these batteries, their cabling, or the stereo.
Here's hoping the return shipping costs of the incorrect products is reimbursed.
I knew this was not ideal for the test, but where the batteries were set up already, the easiest AC power option was used, not the Ideal.
Next load test we will move the Vac input closer and measure what it is when the Powermax is maxed out.
We are using 0awg cable from powermax to batteries, 4 feet one way.
We reduced the stranding to just big enough to fit under set screws, and we tinned it. Very round, very tight fit with maximum surface area. The output terminals barely get warm. Their connections at the batteries barely get warm.
Amps began tapering at around the 45 minute mark. I missed the exact moment it began tapering. It was reading 75 amps at the ~1 hour mark.
At the ~ 1:30 mark it was down to 22 amps.
Bench temperature 66f, battery temp 81F at the 1:30 mark. 14.72v at battery terminals.
The powermax fan shut off at 40 amps and only comes on sporadically after that, at full speed.
The owner wants to add another 80Mm fan for a push/pull airflow scenario, but mostly because he has a box of 80MM fans salvaged from other equipment he wants to make use of.
As far as tinnitus goes, what joy it is!
I also have Surfer's ear which is basically the skull closing over the ear canal from too much wind and cold water in the ear canal over the last 30 + years.
I've had one ear operated on. They use fine chisels and then a grinder to hack away the bony growths. I need the other ear done too, but when this occurs is another matter.
This stereo is more about sound quality than absolute volume. Underdriven speakers distort easily at higher volumes. I don't see the actual desired volumes really requiring more battery capacity, but it is really an unknown how much the amps will draw at the desired Max volume level, much less the average volume level. But we will have Ammeters on both charging sources and inline on stereo cabling.
The owner of project vehicle is in his mid 60's, and is now grasping the concept of how batteries charge. With the data points we are recording as amps taper, I will make a graph showing the tapering and we can then better estimate how much time to set the timer for, and help to fill in the blanks regarding the charge acceptance profile.
I will update when there is more data to add, but don't hold your breathe. The project vehicle is having fuel delivery issues which take precedence, well before installation of these batteries, their cabling, or the stereo.
Here's hoping the return shipping costs of the incorrect products is reimbursed.
