During the sleep period it completely stops charging the battery as a way of reducing water loss.
That appears to be what our new inverter does as well. While I don't see any documentation as to time, it does go into a state where it shows 0.0 amps of charging. Then, from time to time it kicks in at some random rate but never the full 150 amp which appears to be a step higher than float. We have AGM batteries so water is not an issue but I think this charging pattern will provide a better overall experience than our old 458. I do know that the new 150 amp charger and the way the charging cycles are handled, substantially reduces the recharging time when we are dry camping.
