Need Solar Guru Help!

campermama wrote:

otrfun wrote:
Many 12v lifepo4 voltage/SOC charts show 13.20v (resting voltage) as equivalent to 70% SOC. The key here is "resting voltage".

Ok so the 13.2 is not really "resting", then would the actual "resting" voltage show a higher voltage or less?

After charging, final resting voltage will be lower. After discharging, final resting voltage will be higher. Higher charge/discharge current means a greater voltage delta (difference) to reach a given resting voltage.

Why do you need/want to calculate SOC based on voltage? A shunt-type battery monitor (properly calibrated) will calculate SOC much more accurately.