Perhaps Capacity is Not King
I don't want to derail the current "charging AGM batteries" thread more than I already have. During the course of that thread I was shopping for AGM batteries, trying to determine which ones could ...
Forum Discussion
I was a bit pressed for time and forgot to take SG readings before I installed the battery and hooked it up.
I had charged it a bit more and it had a resting voltage of nearly 12.9.
After I got it installed and properly secured, I Hooked up the cables and turned the fridge back on. I was a Little disappointed to see the voltage drop to 12.2 quickly, but then, as I watched, it climbed back up to 12.5, while under an ~ 3.2 amp load. Never noticed that occur before.
I wound up taking about 30 amp hours out of it, and while Doing so, I disassembled my Schumacher charger and removed the 40mm Muffin fan and replaced it with a 60MM fan of the same current reading. I believe the air intake holes were insufficient for the loud annoying 6.3 CFM 40 MM fan so I drilled a bunch more for the higher 17.1 CFM fan.
This fan comes with little adaptor cables with resistors in it to lower the speed, noise and current. One lowers it to 13.83CFM, the other down to 9.83 cfm. The fan also works with both resistor cables in series. Basically I have to put my ear within 12 inches of the 9.83 CFM to be able to hear it.
http://www.noctua.at/main.php?show=productview&products_id=48&lng=en&set=1
I did not install any resistor cables on the Schumacher, yet. I can now just barely hear it with my cabinet door closed. A huge improvement in sound. I wonder if there is such a thing as too much cooling, and if it would be better to lower the fan's speed to bring it closer to the CFM rating of what it left the factory with. Any input on this?
The Northstar 27 continues to crank my engine extremely quickly. I like the fact that this battery can be cycled and also has more CCA than an equal size flooded starting battery would have. My bragging rights AGM, is impressive.
The SW regional guy from Crown Battery called me back today, said he was going to ensure the battery distributor received the correct literature for what they were relabelling. He said they still make the Deep cycle group 31, in addition to the marine version. Was not sure why it was not on the website but that it should be.
He asked me what I wound up with, and I told him that I have one of their competitor's.
I had charged it a bit more and it had a resting voltage of nearly 12.9.
After I got it installed and properly secured, I Hooked up the cables and turned the fridge back on. I was a Little disappointed to see the voltage drop to 12.2 quickly, but then, as I watched, it climbed back up to 12.5, while under an ~ 3.2 amp load. Never noticed that occur before.
I wound up taking about 30 amp hours out of it, and while Doing so, I disassembled my Schumacher charger and removed the 40mm Muffin fan and replaced it with a 60MM fan of the same current reading. I believe the air intake holes were insufficient for the loud annoying 6.3 CFM 40 MM fan so I drilled a bunch more for the higher 17.1 CFM fan.
This fan comes with little adaptor cables with resistors in it to lower the speed, noise and current. One lowers it to 13.83CFM, the other down to 9.83 cfm. The fan also works with both resistor cables in series. Basically I have to put my ear within 12 inches of the 9.83 CFM to be able to hear it.
http://www.noctua.at/main.php?show=productview&products_id=48&lng=en&set=1
I did not install any resistor cables on the Schumacher, yet. I can now just barely hear it with my cabinet door closed. A huge improvement in sound. I wonder if there is such a thing as too much cooling, and if it would be better to lower the fan's speed to bring it closer to the CFM rating of what it left the factory with. Any input on this?
The Northstar 27 continues to crank my engine extremely quickly. I like the fact that this battery can be cycled and also has more CCA than an equal size flooded starting battery would have. My bragging rights AGM, is impressive.
The SW regional guy from Crown Battery called me back today, said he was going to ensure the battery distributor received the correct literature for what they were relabelling. He said they still make the Deep cycle group 31, in addition to the marine version. Was not sure why it was not on the website but that it should be.
He asked me what I wound up with, and I told him that I have one of their competitor's.
