LiFePo4 lithium battery charging questions

ewarnerusa wrote:

3 tons wrote:
...LFP SOC can be problematic to track (due to a relatively flat discharge voltage plateau…), thus you should use a shunt meter that’s known to be capable of accurately tracking LFP chemistry, such as a Victron smart-shunt (to smart phone), or BMV-12 (with meter), or equivalent…

3 tons

Thanks again 3 tons, I appreciate the input. I do plan on adding a monitor with this upgrade. The Renogy smart battery offers a monitoring screen for around 50 bucks that plugs into the battery via RJ45 cable and communicates directly with the BMS. They claim, "Instead of measuring the current flowing in/out of the battery bank using a shunt, it can communicate directly with the battery management system (BMS) and obtain more accurate state of charge (SoC) readings compared to traditional battery monitors." To me, it is more convenient to use this feature vs installing a shunt system. Any feedback about their claim of obtaining more accurate SOC this way vs a shunt system?

I’m not familiar with their offerings, so it’s kinda hard to say by what means their set-up arrives at SOC (battery internal shunt, or what??)…Personally (cost aside here…), I would want to ensure their use of a shunt-derived *calculation - this, to avoid the possibility of questionable ‘or suspect’ inaccuracy - I’d want to ask about this - JMO

* a calculation based on coulomb counting, voltage, and an embedded ‘look-up’ data table (provides real-time data comparisons)…A ‘Lithium capable’ meter should have these characteristics -

3 tons