Just curious if the 6000XP is working for your application?
I have recently set up a similar goal, of "UPS" for my server/network room. I have a 3000EHV and 48v 100ah Lifepower.
I found this thread during my search to find a software/program to do the switching of Battery to util via a rpi and Solar assistant.
The 6000XP is working perfectly for my desired setup. I had two goals in mind.
1. Battery Backup
2. Time of Use energy savings (TOU)
The EG4 3000EHV-48 solved #1 just fine and could have been kept in place if I was looking for battery backup alone, but that was just part of my goal. In order to get more benefit from the system, I wanted to take advantage of "peak shaving" by buying electricity when it's cheap (charging and using grid power) while going off grid during peak hours when electricity is expensive. I was able to accomplish this very nicely with the 6000XP.
So far, I do see some system losses due to charging & inverting, but the savings I am seeing is offsetting these system losses. I've attached two billing cycles from my electric company that show my daily usage for Winter Rates. You can see when I finished the 6000XP install with all of my batteries right around January 11. January 12th I added some additional batteries and did some TOU programming. By January 16th I have the system fairly well dialed in.
I am currently on the grid and charging from 8 a.m. to 4 p.m. while power is the cheapest. I go off grid from 4 p.m. to 8 a.m. I started off with the 6000XP and a single indoor wall mount 280Ah battery. After a few days, I added some server rack batteries to boost my total storage up to 580Ah. I didn't really need to do this, but wanted to know that the system could operate on battery for at least 30 hours if needed and I have now accomplished this. I currently have just over 50% battery left at 8 a.m. each day when charging starts again and I've limited my charging to 75 amps to give the batteries a nice slow 0.13 C rate of charge.
I've included some data below from both the EG4 Monitor and Solar Assistant.
Here's a picture of my 6000XP with the mixed battery bank. I mostly did this battery bank as "mixed" because I wanted to test out a number of batteries from EG4 and spread out my battery investment to some degree. I bought these over a few months and with different uses in mind; as I was first using the 3000EHV-48.
So far, the server rack batteries are all charging back to 100% each day, while I do see the 280Ah Indoor Wall Mount only reach 99% before the BMS shuts off charging. I've seen a number of other users online with similar setups and this slight difference in charging really does not concern me. EG4 has a "Multi-Pack firmware" upgrade for mixed batteries like this, but I have not tried it and I don't really fully understand how it would benefit my situation and mix of batteries. The firmware exists for a reason, but the documentation on this firmware is marginal at best (with no documentation on mixing a Wall Mount battery with multiple models of the server rack batteries). Maybe someone from EG4 can better explain the multipack firmware and provide some guidance on the best practice for my mix of batteries.
