Er no. Definitely not )
I am not even going to waster one minute trying to get three different charging options to play nice.
We all get to choose how we spend our time. My comments are not intended to change your mind. They are for the benefit of other readers who may find themselves in a similar situation and choose to spend their time making a few voltage adjustments to their different charging options to create a charging strategy that optimizes Lithium pack life.
With a 600 Amphour battery capacity and a safe charging level of 0.5C it is safe to say that the battery could take 300 Amps of charging from multiple sources without causing harm. If one wanted to be conservative 200 Amps would be 0.33C So the first risk management step would be to add up the capacity of the three sources to see if they could exceed 200 Amps. If they do not exceed 200 Amps, then physics will take care of the concern about the charging options playing nice with each other.
Now for the the issue that I see is important is how to terminate charging. I assume each of those options has a programmable setting but if not, there are simple voltage activated relays that can terminate charging at programmable voltages. Now, for the benefit of other readers, the charge curve of every Lithium chemistry has one important point known as the knee of the curve where the voltage increases under constant current charging. That typically is an SOC of approximately 90-95 percent SOC and is a perfectly good voltage at which to terminate voltage. The good thing about Lithium chemistries is that unlike FLA they do not need to be fully charged to optimize their service life. Until you find the perfect current based solution what settings are you now using for voltage to terminate charging?
voltage alone is poor predictor of almost everything
I need charging history, based on current uptake
I agree that voltage alone is a poor predictor of SOC except at the upper knees of the charge curve when it is a reasonable indicator that the cells are approaching 100 per cent SOC or full. The cells do not have a memory of what happened to them so charging history is of no use to the cells. If a reader feels they need history then they can spend the time on devices to get them that history.
THIS IS DEADLY TO LiPo4 cells as the link in the first post explains in great detail.
ANY voltage above resting voltage will over charge the pack. Thats what most seem tyo fail to grasp about this technology (including me until recently)
Yes, I said that Float is just a low Amperage Constant Voltage stage. I agree it can be deadly to Lithium at high voltages typically of most FLA chargers. The author agreed. However a Constant Voltage at or around the settling voltage is not harmful to LFP, especially at low current. Even the author of the article you referenced said the key to long life for LFP is that, ".....they are never floated, never over-absorbed, never held at a high SOC for long periods," In fact that supports my notion that an absorb (Constant Voltage) stage at the end of the Bulk (Constant Current) stage is not even necessary. And that is why a simple termination of charging at a conservative voltage works for me. I still give my pack a low amperage CV stage (I prefer that term to Float or Absorb. At that stage in my daily cycle the loads discharging the pack often exceed that low amperage charge and it never exceeds a few hours.
I have 600ah capaity which is more than enough to to run everything for a few days, so I dont need to keep batteries topped up all day. Once charged. Thats it. No more charging until they fall to say 50-70%.
That is a very good strategy. I have been using LFP batteries since I first converted a bicycle to electric in 2010, I did an EV conversion in 2012 using the same Winston cells that the author of the article used. I have since moved through three stationary storage hyvrid inverter systems for my homes and probably cycled batteries thousands of times. I have made mistakes of over charging and over discharging as I stated above my only purpose is not to argue with you but to provide meaningful information to other readers.
