I'm in a new Keystone Cougar RV that came equipped with a 400 watt solar collection system, and Victron 100/30 charge controller + smart shunt. I purchased and had the dealer install a new 270W LiFePO4 12V battery, and went through all the proper configuration steps with a Battle Born batteries support engineer. The components were all factory equipped, and wired by Keystone. Zero Current calibration was performed with all battery connections disengaged, and the solar charger set to 'disabled' in VictronConnect. The Inverter was powered off.
In the morning when the sun is low, the solar shows it is collecting about 100W of power. As the day progresses, the solar rises above 350W at ~40V yet the shunt still shows a difference of about 40Watts at 13.5V if I turn off the solar charger and watch the load level on the battery change. I observe a drop from -12W to -26W when the solar is showing 130W of power being collected. This leaves me wondering, "Where did those other 116 Watts go?" The battery cables are tight, and none of the wires are warm to the touch, so I don't think its heat loss. That much power expended as heat would have caused a fire.
The battery in question is the GameChanger 3, which is configured as directed by Battle Born batteries, with 14.4V Absorption Voltage, 14.4V equalization and 13.6Float, but the Equalization is disabled in the app. Max charge current is 30A. On the shunt, the settings are 270Ah Capacity, 14.4V Charged Voltage, Floor 0, Tail 3.50%, Peukert 1.05, Efficiency factor 99%.
Yesterday I ran on battery all day, and before the battery reached low voltage for my refrigerator (at about 4%), the smartshunt displayed that I had expended 285Ah of power.
So the question is: How can I get the SmartShunt to properly display the power it is receiving from the charger again? If everything is configured correctly, and the calibration was done with no load, I would expect no more than a 10% loss of power from the solar charger.