Gerrit84

That someone doesn't know what they are talking about.  Once a lithium battery reaches a certain state of charge at a given voltage it will no longer accept charge.  You can keep it at that voltage and it will simply draw self consumption current at that point (nearly no current whatsoever).
The only thing to avoid is high "float" voltages.  For example, with LiFePO₄ to charge the battery fully you would technically charge it at 3.65v per cell and then keep the float somewhat lower than that because at 3.65v the cells degrade much faster.  Thus you would typically float it at a more reasonable level like 3.42v per cell.  For LiFePO₄ there are pretty compelling evidence to show even charging up to 3.48v per cell will get you to 99% SoC.  That last 1% dramatically reduces the life of the cell and is thus best avoided.  But you can easily test that for yourself if you have a BMS (ie. with LiFePO₄ charge up to 3.65v per cell, drain battery down, then charge back up to 3.48v per cell, then drain down.  Compare Wh you attained and thus be informed of what that last bit buys you.  Then adjust accordingly to meet your expectations).
Lots of these yahoos around who try to apply Lead Acid logic to Lithium batteries.  It just doesn't work that way.
Assuming LBSA uses LiFePO₄ in a 16s configuration, their 56v "charge" voltage is 3.5v per cell and 54v = 3.375v per cell.  I personally went a bit higher on my "float" but they have obviously tested this and determined that you will still get a guaranteed capacity at that float voltage.  At the float they propose LiFePO₄ is pretty far from its maximum voltage, I wouldn't be concerned at that voltage about premature aging.  The reason they went up to 56v in the first place is to ensure all the cells are fully charged.  Because the cells are in series if the "float" was 3.375 some cells may not be fully charged.  So you bring them all near enough to 3.5v and they'll all self consume down to 3.375 and be 98% or whatever full at that point.

Hi guys,
Just wanted to present to you a new Windows' software tool that we prepared for monitoring of PIP/Axpert inverters and Pylontech batteries. It supports many compatible inverter models. It can work with parallel configurations as well. This was actually the main reason to write the software because a few months ago I upgraded my system from single to 3x inverters and the "pi" solution did not work correct anymore.
The software can control switching between battery/grid mode based on Pylontech SOC, and also can control Pylontech max charge current based on the request coming from its BMS. The software can also upload data to emoncms server. 
Currently the software has only basic reporting, but all inverter/pylon data is stored in local database and we intend to add more reporting options in future.
We also added a "console" screen where users can manually send commands to Inverters and Pylontech.
The communication with inverters is by USB or RS232 connection. In parallel setups each inverter should be connected with separate cable. I chose this method because reading parallel data from a single inverter is highly inaccurate and slow (at least in the setups where we tested).
The Pylontech batteries can be connected by RS232 (console port) or RS485 (to the dedicated RS485 port). 
You can download the software at http://www.multisibcontrol.net . It is absolutely free now.
 

Perhaps not the best input but I have my float just 0.4V lower than bulk. I am happy using 27.8V for bulk. 
Equalisation is off and not needed. As you said going up to above 28.5V for long enough is only to allow balancing of cells and not to get the battery fully charged. 
Your cut out is fine. I use 24V in order not to discharge very low as you gain very little in capacity by going down to 21V. Falling off the cliff for lithium. 
My S-100 drop inn's are doing very well after over 2 years. 

100a continuous,so 1c (reportedly)

At 30A it might not go over 800W.