"i really need to see what kind of amps these things will accept just after the pm drops down to abs mode."
You already know that!!!! :( The reason the pm dropped is because it reached 14.6 and amps taper from there even if the thing didn't drop to 13.6 ---once again---look at the ugly graphs, my goodness.
No, 40 amps is not more than twice as fast on half the bank, it is twice as fast. Doubling the amps on the same bank does not halve the time. Doubling the size of the bank with the same amps doubles the time. Double the amps and double the bank and it takes the same time. See my ugly graphs, my goodness . :)
Camping tactic to reduce size of bank and operate in the lower SOC zone where acceptance rate is higher is good as long as you stay over 50% SOC. That is what the 50-80 was invented for--faster charging.
You still need to get to 100 every so often. Without shore power that means solar (can't run gen that long) Solar needs enough sun so location and seasons and daily weather in all seasons matter.
Another way is to run on half the bank and sneak the other half into work while the boss isn't looking and charge up the batts with a portable charger, then sneak them out and back to the trailer.
