LiFePo4 battery users

[RoamingKat]

Sternwake....I have discovered that I am so anal that I know the state of my battery every moment.
I know a couple of lithium users that choose battle born because they never pay attention to the battery and they do not want to ever be bothered. (They run the electric heat all night and just let the BMS shut it down whenever it is drawn down so far the system has to protect the battery.)

So, the battery chargers that I have (solar and other) have limits set to prevent over charging. So that is not an issue. I am so intune with the draw on my batteries that I usually never have let it get down past about 50%. (I tried to charge an electric car with my house battery one time...dropped to about 40% and almost melted a cable besides).

Temp is set on two relays. They turn on heat or fan. Plus ring an alarm. Mostly that is for overnight protection. I have never set off the alarms yet. If it ever came to it, I can shut off everything with a master switch on the positive side of the battery. Since I do not have to,be concerned about out-gassing....The batteries are inside with me. So heating and A/C to suit me also is good for them.

Balancing is done...first the bottom cell balancing is done internal by the type of battery I purchased. (I would guess that most people are not going to assemble the individual cells themselves). The balancing between the batteries is done by 4 external balancers that are wired to each battery and then wired together. I have 16 batteries....3.1V X 100 AH. Wired to create first 12v X 100ah battery...then in parallel. This makes up 12v x 400ah. Only time I use much of that is running A/C. Which I can do for about and hour and half at night when it is really too hot to sleep. Even the electric heat doesn’t use that much....mostly because I am not in freezing temps so I don’t need to run heat much in the morning

So, that leaves the only unanswered question. How much is too much when talking about the batteries being full over time. Right now, I turn off the solar panels for a day every other day. I do not know if that is enough. When I run the AC I have all my solar panels deployed, so I do not worry about that because of the large draw down....but the rest of the time I feels like my batteries are full almost always if I don’t disconnect charging. A chart with time on one axis and degree of full on the other would be a awesome diagram to have! Right now it is a guessing game.