Need advice for Lux Powertech Web Interface/app settings

Wattstored

Hi, I am new to the forum & have recently added Lux SquirrelPod/Pylontech 9.6kW battery storage independent from my existing solar setup.

We have two EVs and 5kW PV with 6.7kW battery storage but because of the way this was installed I'm unable to force charge without it registering as additional FIT payment (not permitted of course). The Pylontech batteries will therefore be independently force charged when needed.

The Lux setup is predominantly for use during the winter months when PV generation is low, to charge during the 6 hour Intelligent Octopus time slot which I already use for the cars & programmable appliances. 

I am trying to get my head around the ‘Maintain’ part of the Lux web based app and am unsure about some of the terminology/setup features so could someone please help and confirm what each of the following is meant to do (screenshot at the bottom shows where each question relates to)…

1. Power Backup (Enable/Disable). What does this do?
2. System Charge Power Rate % - what does this do?
3. Charge priority settings - if enabled does this block discharge for the hours set in any/all of the 3 start/end times? 
4. ….If so, what does disabling Charge Priority Disable actually do?
5. What impact does changing Priority Charge Rate % have? 
6. What are Discharge Settings supposed to do?
7. What are the Forced Discharge Enable/Disable meant to achieve - is this purely for export back to the grid based on a PV linked inverter or will it somehow export from the Lux/Pylontech batteries back to the grid? (Something I do NOT want to do as I will not receive payment)
8. What are the meanings of On-grid discharge Cut-off and Off-grid discharge Cut-off.
9. As a final, probably dumb question, can anything be done between the two systems to automatically fill the Pylontechs once the other batteries are full? (I am assuming that there would not be a CT clamp configuration that could achieve this if I took one from the LUX to either the PV inverter +ve cabling or the main incoming house +ve supply cable).  

*When not charging overnight 23.30-05.30 I occasionally want to be able to start charging during the day at a lower rate than potentially exported solar generation ie a cloudy period where the panels are exporting excess (after ‘their own’ batteries are full) so I want the Lux inverter to only charge the Pylontechs at a low rate to avoid also taking the remainder from the grid during a daytime peak period. I appreciate that this arrangement would require monitoring & adjustment in real time to try and avoid drawing from peak rate grid & therefore probably impractical. However there are occasional cloud free days where it could be used if I find a way to trickle charge at a low % rate, hence why I’m asking. 

The alternative is to set the Pylontechs to charge when the PV batteries are at a low SOC so solar generation goes there first but I don't want the LUX to draw 3.6kWh at the max of my other inverter, hence I need to understand the answers to questions 2 & 5 above so I can reduce to a lower charge rate.
 

Any answers or help from experienced users will be appreciated as I am not clear what many of the config settings for the Lux actually do.

Many Thanks

Andrew

gefnew

I would try here on this thread.
Lux ac battery controller - Page 99 — MoneySavingExpert Forum

Wattstored

yes, I had read through all 99 pages of that several days ago and already posted my questions on there without a reply, hence starting this new thread