Calibrating Voltage of your system to ensure Optimal Operations.
The BATTERY reading (be it a single or a bank of packs) is the one that RULES and the remaining equipment must "match up" to be effective. Example using basic numbers to Keep It Simple: Assume the Battery reads 24.0 VDC, the SCC reads 23.75 VDC and the Inverter/Charger sees 23.60 VDC.