[hwstar] built a custom power monitoring board based on this IC. His AC-Emeter will give you all the measurements you’d want, and includes an ESP12 module for data collection and WiFi connectivity.

The idea came when he learned about the INA219 chip. The INA219 is a current shunt and power monitor IC with an I²C or SMBUS compatible interface. The device is able to monitor both shunt voltage ...

Besides wringing out as much power as possible out of the EV battery ... NXP’s battery-management IC can monitor the voltage of the battery pack through resistors placed on the high-voltage ...