BFL13 wrote:
100lb AGMs sound like 4Ds Some of those can be 200AH, while my 8D at 150 lbs is rated 250AH. AGMs except Lifeline seem to have spec max charging at about 30% charging rate. So 50 amps on 150AH works.
I had the 100AH AGMS for a year before they got in this MH and for the two years since they have been recharged per Mex's rules (20% bulk, 0.5/100) The 8D was second hand so I don't have its history. It has worked ok for a year until this started.
It seems to arise from repeated high amp draws where heat must build up inside and warps or cracks the plates somewhat. One high amp run I can get away with, maybe--we'll learn more about that when next out camping.
The mix of 27s with these AGMs is a quick-fix attempt to get more time with these AGMs before I have to get a new battery set. One of these days I will have four new batteries all the same, and have no more trouble :)
I use them like they are 150Ah. There is a 100lb Lifeline that is 150Ah. They are 13+in long and 11+in tall. I do have a G31 Johnson Controls and these are basically just taller.
I lifted the dinette seat and the label reads 'pwhr12500w4fr'. I have read that as 12V, 500W. I used the 2 with the 1000W inverter and the 4 are used with the 2200W inverter. The spec sheet includes a constant Watt chart.
I cannot meet the 20% rule with the 4. The charger is 75A and the 600Ah total for the 4 would call for 120A to get 20%. Adding 20A solar which usually is not usually coincident is only 95A. However, I am a stickler for getting to .5%.
I will be running capacity tests in Oct. I expect to draw 150A for 2 hours to prove the bank is ready for next year. I too like a silent breakfast. That is extreme though. When I first started using a converter, I was happy to get 80A for 30 minutes from a 79Ah Deka.
The Spartan charger calculates ABS time during Bulk. The time can be from 1 to 12 hours. I can manually restart the Spartan and get an extra 1hr ABS as often as I want.
HTH;
John
