We have a LFP battery suite. LFP should not remain at high float for extended periods of time (3.4 V per cell) and keeping an LFP suite on continuous charge from line power will degrade the cells. Chris of Technomadia candidly writes about the problems they had with his in his write-up of 3.5 years of LFP usage.
For this reason our son designed and fabricated our system so that the original 50 amp inlet system is isolated from the battery charging system. The 50 amp system (which we have not used in two years) will only run the AC appliances: hot water, micro-wave, air conditioner. The original OPM converter is only used to supply power from the battery suite via the 508 W Mean Well 48 to 12 V converter. We have tossed the 50 amp cable and its replacement 30 amp cable since we have not used either in two years except to trial the system.
The battery suite can be charged via a 1.5 kW battery charger and a 15 amp (120 V) extension cord. We have used this once when it was 103 at an RV park in Spokane (were visiting relatives and no place to boondock) and we were in the shade and really wanted a/c.
Daughter has about 6 or 7 kW of solar, brother-in-law has around 3.1 kW and son has around 5 or 6 kW of solar.
Reed and Elaine