New member here. Just finished installing an 18Kpv with four LL-S. No PV yet - first step is to get this system working as a whole house battery backup. I may add PV in a year or two. I've been struggling with settings first to get batteries to charge, and then later to get batteries to stop discharging. The differences between which settings are available on the control panel vs the Android monitoring app, and the differences in setting name labels, makes the system setup very frustrating. Finally found a setting only on the control panel which allowed the batteries to begin charging from the grid.
A day later, I could make no sense in the logic the unit is using to decide to start discharging batteries. Despite SOC down to 25% and grid being available, unit continues to drain batteries to power the entire load. After triple checking all my settings for AC Charge, SOC start and stop charge limits, etc. I was stumped and close to asking for an RMA for the whole lot. I happened to open up the web page for monitoring, which I had yet to look at. I assumed it was just a better presentation of exactly what is on the phone app. Wrong. I quickly discovered a setting "Power Backup" which doesn't appear in either the device control panel or phone app. I enabled this setting, but no change. I then discovered a function button "Start Battery Backup" which also does not exist in either the control panel or phone app. Pressing this button finally stopped the battery discharge and began powering loads from grid as well as charging the bank at the limits I'd set. I'm now waiting to see what is going to happen once the bank reaches 100% - will it immediately begin discharging again as it did with my first testing, or will it keep the bank full as a backup, as I intend.
The missing settings and function buttons in the device control panel and the phone app are very frustrating. As a software engineering manager of over 30 years on embedded systems, I will state that whoever is in charge of SW at EG4 needs to do better.
