For those wanting to monitor lots of individual channels in a single-phase household the ADE7816 is an ideal solution. It allows differential current sensors for 3 channels and single ended current sensors for 3 more channels. The MCU interface is over SPI or I2C bus, and Arduino driver will be developed along with this breakout board.
There is work in progress on supporting this board in Arduino and Micropython.
The hardware can be obtained as PCB, PCB + Parts Kit or Fully assembled.
