When you guys talk .05c, 1c, 2c etc I admit I'm lost, terms I never encountered in my years of electronic repair
For a 100AH Battery Pack, the 1C Rate is 100A, the 0.5C Rate is 50A. A 280AH has a 1C of 280A & 0.5C of 140A.
The 0.5C Rate is for CHARGING and not to be exceeded lest unpleasantness occur.
The 1C Rate is for Discharging Only. Most Cells CAN exceed that in a "Burst" mode for 2-5 Seconds (pends on the manufacturer) and it can be as high as 5C, so a 100AH outputting 500A for 2 seconds. A BMS will prevent such misadventures. LFP actually does really well with a 0.2-0.4 C Rate which will not even warm them up much. They get warm during charge, if too high they will get Hot ! LFP can handle up to 55C/131F Temp
Trickle is relative... Float is NOT trickle. Float is simply Constant Voltage & Variable Current which allows the cells to get to their Full Saturation state @ set voltage, not just a surface charge.
Charging with higher Amps. This is typically done when you have a Battery Bank consisting of several battery packs in parallel. OIn Parallel they share/divide both Charge & Discharge. Myself, I have 3x 280AH and 2x 175AH in one bank for 1190AH / 30kWh. During the Thrash Testing I pushed up to 250A into the batteries but that was divided between them. ALSO something that most do not realize, when you have a bank with different capacity cells, Charge & Discharge tends to be proportional relative to Pack Capacity. That get's TRIXY ! BTDT, A difference is OK but not too large otherwise you'll run into the bigger packs trying to charge the smaller ones when they get low. Best to try and keep them close like 280AH + 304AH would be just fine.
Cycles, there has also been contention there between "some". A Full Cycle is going from the Programmed Low Volt Cutoff to Full and back. A Partial Cycle (most common) is just that, your battery cells go from 3.400Vpc to 3.100Vpc and then recharged, that's a partial.
Re Growatt: Cannot speak to their behaviour as I do not use an AIO of any kind. Midnite Classic Solar Controller & Samlex Inverter/Charger here... I also use JK-BMS with 2A Active Balancing on my battery fleet (including utility packs) and so I float them so they are all perfectly topped off and have a good charge saturation before they are called upon to run my home. It's always nice to see the Delta between all cells in all packs @ <0.005 +/- 0.002.
BTW: I am No Longer seeing anything from that Gone Boating dude as he/she/it graduated to the IGNORE List ! Tedius nit pickery is of no interest and pointless, other than mulching a thread... Take the HIT, Go Sailing into the Sunset already.