Enquire whether anyone has experienced this. This morning, I entered the vehicle, and my BM2 indicated a low state of charge and a battery voltage of 10.5 volts. The battery was just replaced with a Yuasa Silver. The vehicle initiated without issue and indicated charging during my 30-minute journey, with the state of charge increasing. Returned to the vehicle thirty minutes later; it started without issue, but the voltage was again low. Arrived home and turned off the vehicle; the voltage immediately decreased again.
I replaced the 12v battery with the old one, which indicated 12.65v, and immediately it began to decline to low 11v readings. The vehicle in utility mode indicates that it is charging properly; nevertheless, there seems to be an anomaly with the battery voltage decreasing despite no active components. I have verified the voltages with a multimeter, and they correspond accurately to the BM2 readings. Are these indications of an impending ICCU failure?