Today makes 6 years of continuous use of my system with lfp of fulltime boondocking and the days that I was on a power pole I would turnoff the charging from inverter and let the power pass through so only solar was charging the the batteries if needed it from misc 12v loads (fridge, furnace).
2016_ 200 of 261 days
2017_ 365 of 365 days
2018_ 365 of 365 days
2019_ 344 of 365 days
2020_ 282 of 365 days
2021_ 349 of 365 days
2022_ 102 of 102 days
Total of 2,007 days boondocking.
Everyday there are high draw appliances being used from 5-20 minutes (coffeemaker, microwave) to 2-3 hours (15k air conditioner) or just the idle draw of the inverter with a humidifier always going 24/ 7 of 7ah. We live off of the system almost like being on the grid.
My solar and inverter/ charger are set to the same settings of 14.1v absorb (10 minute max, 6 minutes is the normal time till it switches to float), 13.6v float. Our daily power consumption can range from 175ah to 275ah just depending on the season. Shorter the day light hours the more power consumed from batteries. This is running everything in the trailer (not at once). Coffeemaker, microwave, air conditioner, vacuum, ice maker, fridge, air compressor, and other misc hand tools. My inverter is set to 12.0v cut off and never have had it shut down yet due to low voltage even when drawing 150a load at 30% SOC for 5 minutes.
If I have lost capacity I can not tell yet in my day to day use of the system. I have/ do use between 20-100% depending on the season.
I have not had to break the system apart for rebalancing of cells but had to replace 2 senseboards on 2 cells a couple years back. The cpu/ bms shut my batteries down and after bypassing the cpu/ bms was back up and running. Ran it like that for 2 months till I got south to replace them.
I guess my point being is that there are not alot of folks using their rvs in an extreme boondocking/ dry camping situation and try to get "longevity" out of the batteries seems just silly when using them per the manufacturer specs of voltage range 2.8vpc-3.65vpc should yeild a very long life of 2,000-5,000 cycles of 100% use seeing that most are just weekend worriors or on power poles most of the time and in those cases just get dead lead. I believe most will kill their lfp by mistakes of human error or the cells will age out.
Just my opinion from years of hands on experience in all environmental conditions and use and expect to get many more years out of the system.
