Response from Sol-Ark.
"Our system uses battery resistance to calculate and compensate for voltage droop under load. Our settings are in milli-ohms. I haven't seen anything less than 5 m-ohms. At 275A possible draw from a 15K, with 5 m-ohms, this amounts to 1.375V of droop, which can mean the difference between hitting a battery setpoint for grid or gen charge, inverter shut down due to low battery level, etc... or not. 100 micro-ohms for 275A would be only 0.0275V, so this difference is significant in absolute terms.
If you are talking to their support, I would ask them the question: "so you're telling me these batteries essentially have zero voltage droop under significant load?" and see what they say."
